/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-a20a710-m [2023-12-09 15:03:14,441 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-09 15:03:14,501 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-09 15:03:14,515 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-09 15:03:14,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-09 15:03:14,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-09 15:03:14,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-09 15:03:14,517 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-09 15:03:14,517 INFO L153 SettingsManager]: * Use SBE=true [2023-12-09 15:03:14,517 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-09 15:03:14,517 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-09 15:03:14,518 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-09 15:03:14,518 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-09 15:03:14,518 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-09 15:03:14,518 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-09 15:03:14,519 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-09 15:03:14,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-09 15:03:14,519 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-09 15:03:14,519 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-09 15:03:14,519 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-09 15:03:14,520 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-09 15:03:14,520 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-09 15:03:14,520 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-09 15:03:14,521 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-09 15:03:14,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-09 15:03:14,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 15:03:14,521 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-09 15:03:14,521 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-09 15:03:14,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-09 15:03:14,522 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-09 15:03:14,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-09 15:03:14,522 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-09 15:03:14,522 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-09 15:03:14,522 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-12-09 15:03:14,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-09 15:03:14,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-09 15:03:14,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-09 15:03:14,737 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-09 15:03:14,738 INFO L274 PluginConnector]: CDTParser initialized [2023-12-09 15:03:14,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-12-09 15:03:15,779 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-09 15:03:16,003 INFO L384 CDTParser]: Found 1 translation units. [2023-12-09 15:03:16,004 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-12-09 15:03:16,018 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dcd37787/00756d86279147b8b40fe7800eca7aba/FLAG284250c82 [2023-12-09 15:03:16,029 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dcd37787/00756d86279147b8b40fe7800eca7aba [2023-12-09 15:03:16,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-09 15:03:16,032 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-09 15:03:16,033 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-09 15:03:16,033 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-09 15:03:16,037 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-09 15:03:16,037 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15495007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16, skipping insertion in model container [2023-12-09 15:03:16,038 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,067 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-09 15:03:16,303 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2023-12-09 15:03:16,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 15:03:16,334 INFO L202 MainTranslator]: Completed pre-run [2023-12-09 15:03:16,372 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2023-12-09 15:03:16,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 15:03:16,405 INFO L206 MainTranslator]: Completed translation [2023-12-09 15:03:16,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16 WrapperNode [2023-12-09 15:03:16,407 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-09 15:03:16,408 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-09 15:03:16,408 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-09 15:03:16,408 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-09 15:03:16,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,436 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,456 INFO L138 Inliner]: procedures = 172, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-12-09 15:03:16,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-09 15:03:16,457 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-09 15:03:16,457 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-09 15:03:16,457 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-09 15:03:16,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,476 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,477 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,480 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,484 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-09 15:03:16,486 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-09 15:03:16,486 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-09 15:03:16,486 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-09 15:03:16,487 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (1/1) ... [2023-12-09 15:03:16,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 15:03:16,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 15:03:16,591 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-09 15:03:16,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-09 15:03:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-09 15:03:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-09 15:03:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-09 15:03:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-09 15:03:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-09 15:03:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-09 15:03:16,612 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-09 15:03:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-09 15:03:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-12-09 15:03:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-09 15:03:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-09 15:03:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-09 15:03:16,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-09 15:03:16,614 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-09 15:03:16,718 INFO L241 CfgBuilder]: Building ICFG [2023-12-09 15:03:16,720 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-09 15:03:16,875 INFO L282 CfgBuilder]: Performing block encoding [2023-12-09 15:03:16,902 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-09 15:03:16,903 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-12-09 15:03:16,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:03:16 BoogieIcfgContainer [2023-12-09 15:03:16,904 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-09 15:03:16,906 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-09 15:03:16,906 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-09 15:03:16,908 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-09 15:03:16,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 03:03:16" (1/3) ... [2023-12-09 15:03:16,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df4bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:03:16, skipping insertion in model container [2023-12-09 15:03:16,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:16" (2/3) ... [2023-12-09 15:03:16,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df4bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:03:16, skipping insertion in model container [2023-12-09 15:03:16,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:03:16" (3/3) ... [2023-12-09 15:03:16,910 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-12-09 15:03:16,922 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-09 15:03:16,923 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-09 15:03:16,923 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-09 15:03:16,961 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-09 15:03:16,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 112 transitions, 231 flow [2023-12-09 15:03:17,028 INFO L124 PetriNetUnfolderBase]: 21/156 cut-off events. [2023-12-09 15:03:17,028 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 15:03:17,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 156 events. 21/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 409 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 80. Up to 6 conditions per place. [2023-12-09 15:03:17,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 112 transitions, 231 flow [2023-12-09 15:03:17,037 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 107 transitions, 218 flow [2023-12-09 15:03:17,046 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 15:03:17,050 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5cce3cd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 15:03:17,051 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-09 15:03:17,062 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 15:03:17,062 INFO L124 PetriNetUnfolderBase]: 4/64 cut-off events. [2023-12-09 15:03:17,062 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 15:03:17,062 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:17,063 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:17,063 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:17,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:17,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1934429495, now seen corresponding path program 1 times [2023-12-09 15:03:17,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:17,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116169513] [2023-12-09 15:03:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:17,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:17,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:17,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116169513] [2023-12-09 15:03:17,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116169513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:17,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:17,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 15:03:17,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624836442] [2023-12-09 15:03:17,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:17,250 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-09 15:03:17,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:17,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-09 15:03:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-09 15:03:17,287 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 112 [2023-12-09 15:03:17,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 218 flow. Second operand has 2 states, 2 states have (on average 88.0) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:17,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:17,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 112 [2023-12-09 15:03:17,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:17,359 INFO L124 PetriNetUnfolderBase]: 26/251 cut-off events. [2023-12-09 15:03:17,359 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 15:03:17,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 251 events. 26/251 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 944 event pairs, 24 based on Foata normal form. 47/285 useless extension candidates. Maximal degree in co-relation 245. Up to 64 conditions per place. [2023-12-09 15:03:17,361 INFO L140 encePairwiseOnDemand]: 100/112 looper letters, 9 selfloop transitions, 0 changer transitions 19/94 dead transitions. [2023-12-09 15:03:17,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 214 flow [2023-12-09 15:03:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-09 15:03:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-12-09 15:03:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 197 transitions. [2023-12-09 15:03:17,370 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8794642857142857 [2023-12-09 15:03:17,371 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 197 transitions. [2023-12-09 15:03:17,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 197 transitions. [2023-12-09 15:03:17,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:17,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 197 transitions. [2023-12-09 15:03:17,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:17,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:17,378 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:17,381 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 0 predicate places. [2023-12-09 15:03:17,381 INFO L500 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 214 flow [2023-12-09 15:03:17,381 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.0) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:17,381 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:17,381 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:17,382 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-09 15:03:17,382 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:17,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1481391463, now seen corresponding path program 1 times [2023-12-09 15:03:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:17,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491451277] [2023-12-09 15:03:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:17,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:17,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:17,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491451277] [2023-12-09 15:03:17,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491451277] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:17,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:17,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 15:03:17,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225012316] [2023-12-09 15:03:17,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:17,475 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 15:03:17,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:17,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 15:03:17,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 15:03:17,477 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 112 [2023-12-09 15:03:17,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:17,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:17,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 112 [2023-12-09 15:03:17,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:17,596 INFO L124 PetriNetUnfolderBase]: 73/428 cut-off events. [2023-12-09 15:03:17,596 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-12-09 15:03:17,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 428 events. 73/428 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2096 event pairs, 6 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 640. Up to 132 conditions per place. [2023-12-09 15:03:17,603 INFO L140 encePairwiseOnDemand]: 109/112 looper letters, 23 selfloop transitions, 2 changer transitions 16/102 dead transitions. [2023-12-09 15:03:17,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 102 transitions, 298 flow [2023-12-09 15:03:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 15:03:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 15:03:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-12-09 15:03:17,609 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7827380952380952 [2023-12-09 15:03:17,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-12-09 15:03:17,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-12-09 15:03:17,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:17,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-12-09 15:03:17,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:17,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 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) [2023-12-09 15:03:17,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 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) [2023-12-09 15:03:17,613 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 2 predicate places. [2023-12-09 15:03:17,613 INFO L500 AbstractCegarLoop]: Abstraction has has 99 places, 102 transitions, 298 flow [2023-12-09 15:03:17,613 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:17,613 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:17,614 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:17,614 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-09 15:03:17,614 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:17,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:17,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1172818453, now seen corresponding path program 1 times [2023-12-09 15:03:17,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:17,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446059684] [2023-12-09 15:03:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:17,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:17,638 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 15:03:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:17,677 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 15:03:17,678 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 15:03:17,678 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-12-09 15:03:17,680 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-09 15:03:17,680 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-09 15:03:17,680 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-09 15:03:17,682 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 15:03:17,682 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-09 15:03:17,702 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-09 15:03:17,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 145 transitions, 306 flow [2023-12-09 15:03:17,730 INFO L124 PetriNetUnfolderBase]: 37/259 cut-off events. [2023-12-09 15:03:17,730 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-12-09 15:03:17,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 259 events. 37/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 822 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 158. Up to 9 conditions per place. [2023-12-09 15:03:17,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 145 transitions, 306 flow [2023-12-09 15:03:17,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 145 transitions, 306 flow [2023-12-09 15:03:17,741 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 15:03:17,742 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5cce3cd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 15:03:17,742 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-09 15:03:17,746 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 15:03:17,747 INFO L124 PetriNetUnfolderBase]: 4/64 cut-off events. [2023-12-09 15:03:17,747 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 15:03:17,747 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:17,747 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:17,747 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:17,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:17,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2055118248, now seen corresponding path program 1 times [2023-12-09 15:03:17,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:17,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423214262] [2023-12-09 15:03:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:17,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:17,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:17,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423214262] [2023-12-09 15:03:17,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423214262] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:17,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:17,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 15:03:17,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041871231] [2023-12-09 15:03:17,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:17,772 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-09 15:03:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:17,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-09 15:03:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-09 15:03:17,773 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 145 [2023-12-09 15:03:17,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 145 transitions, 306 flow. Second operand has 2 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:17,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:17,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 145 [2023-12-09 15:03:17,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:17,988 INFO L124 PetriNetUnfolderBase]: 421/1786 cut-off events. [2023-12-09 15:03:17,988 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-12-09 15:03:17,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2545 conditions, 1786 events. 421/1786 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 13548 event pairs, 414 based on Foata normal form. 530/2255 useless extension candidates. Maximal degree in co-relation 2113. Up to 716 conditions per place. [2023-12-09 15:03:17,995 INFO L140 encePairwiseOnDemand]: 127/145 looper letters, 16 selfloop transitions, 0 changer transitions 22/126 dead transitions. [2023-12-09 15:03:17,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 126 transitions, 308 flow [2023-12-09 15:03:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-09 15:03:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-12-09 15:03:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 250 transitions. [2023-12-09 15:03:17,997 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8620689655172413 [2023-12-09 15:03:17,997 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 250 transitions. [2023-12-09 15:03:17,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 250 transitions. [2023-12-09 15:03:17,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:17,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 250 transitions. [2023-12-09 15:03:18,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.0) internal successors, (250), 2 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:18,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:18,001 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:18,004 INFO L308 CegarLoopForPetriNet]: 129 programPoint places, 0 predicate places. [2023-12-09 15:03:18,004 INFO L500 AbstractCegarLoop]: Abstraction has has 129 places, 126 transitions, 308 flow [2023-12-09 15:03:18,005 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:18,005 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:18,005 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:18,005 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-09 15:03:18,005 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:18,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1499170744, now seen corresponding path program 1 times [2023-12-09 15:03:18,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:18,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446768572] [2023-12-09 15:03:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:18,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:18,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446768572] [2023-12-09 15:03:18,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446768572] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:18,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:18,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 15:03:18,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062007567] [2023-12-09 15:03:18,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:18,085 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 15:03:18,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 15:03:18,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 15:03:18,087 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 145 [2023-12-09 15:03:18,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 126 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:18,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:18,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 145 [2023-12-09 15:03:18,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:18,569 INFO L124 PetriNetUnfolderBase]: 1114/3892 cut-off events. [2023-12-09 15:03:18,570 INFO L125 PetriNetUnfolderBase]: For 983/983 co-relation queries the response was YES. [2023-12-09 15:03:18,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7032 conditions, 3892 events. 1114/3892 cut-off events. For 983/983 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 34320 event pairs, 480 based on Foata normal form. 0/3561 useless extension candidates. Maximal degree in co-relation 907. Up to 1728 conditions per place. [2023-12-09 15:03:18,587 INFO L140 encePairwiseOnDemand]: 142/145 looper letters, 32 selfloop transitions, 2 changer transitions 22/136 dead transitions. [2023-12-09 15:03:18,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 136 transitions, 418 flow [2023-12-09 15:03:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 15:03:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 15:03:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-12-09 15:03:18,588 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7609195402298851 [2023-12-09 15:03:18,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-12-09 15:03:18,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-12-09 15:03:18,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:18,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-12-09 15:03:18,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:18,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:18,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:18,593 INFO L308 CegarLoopForPetriNet]: 129 programPoint places, 2 predicate places. [2023-12-09 15:03:18,593 INFO L500 AbstractCegarLoop]: Abstraction has has 131 places, 136 transitions, 418 flow [2023-12-09 15:03:18,593 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:18,593 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:18,594 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:18,594 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-09 15:03:18,594 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:18,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1563849711, now seen corresponding path program 1 times [2023-12-09 15:03:18,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:18,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599512692] [2023-12-09 15:03:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:18,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:18,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:18,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599512692] [2023-12-09 15:03:18,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599512692] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 15:03:18,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394226457] [2023-12-09 15:03:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:18,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 15:03:18,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 15:03:18,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 15:03:18,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-09 15:03:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:18,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-09 15:03:18,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 15:03:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:18,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 15:03:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:18,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394226457] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 15:03:18,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 15:03:18,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-09 15:03:18,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502431466] [2023-12-09 15:03:18,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 15:03:18,924 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-09 15:03:18,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:18,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-09 15:03:18,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-09 15:03:18,926 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 145 [2023-12-09 15:03:18,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 136 transitions, 418 flow. Second operand has 10 states, 10 states have (on average 98.6) internal successors, (986), 10 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:18,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:18,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 145 [2023-12-09 15:03:18,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:19,209 INFO L124 PetriNetUnfolderBase]: 492/1276 cut-off events. [2023-12-09 15:03:19,210 INFO L125 PetriNetUnfolderBase]: For 1042/1192 co-relation queries the response was YES. [2023-12-09 15:03:19,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3461 conditions, 1276 events. 492/1276 cut-off events. For 1042/1192 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 8335 event pairs, 0 based on Foata normal form. 6/1260 useless extension candidates. Maximal degree in co-relation 461. Up to 754 conditions per place. [2023-12-09 15:03:19,217 INFO L140 encePairwiseOnDemand]: 140/145 looper letters, 75 selfloop transitions, 7 changer transitions 0/148 dead transitions. [2023-12-09 15:03:19,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 148 transitions, 766 flow [2023-12-09 15:03:19,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-09 15:03:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-09 15:03:19,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 948 transitions. [2023-12-09 15:03:19,219 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7264367816091954 [2023-12-09 15:03:19,220 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 948 transitions. [2023-12-09 15:03:19,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 948 transitions. [2023-12-09 15:03:19,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:19,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 948 transitions. [2023-12-09 15:03:19,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:19,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 145.0) internal successors, (1450), 10 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:19,224 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 145.0) internal successors, (1450), 10 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:19,228 INFO L308 CegarLoopForPetriNet]: 129 programPoint places, -26 predicate places. [2023-12-09 15:03:19,229 INFO L500 AbstractCegarLoop]: Abstraction has has 103 places, 148 transitions, 766 flow [2023-12-09 15:03:19,230 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.6) internal successors, (986), 10 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:19,230 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:19,230 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:19,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-09 15:03:19,435 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-09 15:03:19,436 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:19,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash -702533315, now seen corresponding path program 1 times [2023-12-09 15:03:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708050802] [2023-12-09 15:03:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:19,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:19,458 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 15:03:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:19,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 15:03:19,480 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 15:03:19,481 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-12-09 15:03:19,481 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-09 15:03:19,481 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-09 15:03:19,481 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-09 15:03:19,482 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 15:03:19,482 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-09 15:03:19,519 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-09 15:03:19,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 178 transitions, 383 flow [2023-12-09 15:03:19,555 INFO L124 PetriNetUnfolderBase]: 58/397 cut-off events. [2023-12-09 15:03:19,555 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-12-09 15:03:19,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 397 events. 58/397 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1377 event pairs, 1 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2023-12-09 15:03:19,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 178 transitions, 383 flow [2023-12-09 15:03:19,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 178 transitions, 383 flow [2023-12-09 15:03:19,563 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 15:03:19,566 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5cce3cd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 15:03:19,566 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-09 15:03:19,569 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 15:03:19,570 INFO L124 PetriNetUnfolderBase]: 4/64 cut-off events. [2023-12-09 15:03:19,570 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 15:03:19,570 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:19,570 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:19,570 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:19,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:19,571 INFO L85 PathProgramCache]: Analyzing trace with hash 455666714, now seen corresponding path program 1 times [2023-12-09 15:03:19,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:19,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767454740] [2023-12-09 15:03:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:19,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:19,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:19,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767454740] [2023-12-09 15:03:19,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767454740] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:19,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:19,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 15:03:19,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397366285] [2023-12-09 15:03:19,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:19,606 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-09 15:03:19,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:19,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-09 15:03:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-09 15:03:19,607 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 178 [2023-12-09 15:03:19,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 178 transitions, 383 flow. Second operand has 2 states, 2 states have (on average 126.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:19,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:19,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 178 [2023-12-09 15:03:19,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:21,148 INFO L124 PetriNetUnfolderBase]: 4833/14324 cut-off events. [2023-12-09 15:03:21,149 INFO L125 PetriNetUnfolderBase]: For 940/940 co-relation queries the response was YES. [2023-12-09 15:03:21,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21749 conditions, 14324 events. 4833/14324 cut-off events. For 940/940 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 153046 event pairs, 4795 based on Foata normal form. 5099/19069 useless extension candidates. Maximal degree in co-relation 18307. Up to 6995 conditions per place. [2023-12-09 15:03:21,280 INFO L140 encePairwiseOnDemand]: 154/178 looper letters, 23 selfloop transitions, 0 changer transitions 23/153 dead transitions. [2023-12-09 15:03:21,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 153 transitions, 389 flow [2023-12-09 15:03:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-09 15:03:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-12-09 15:03:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 302 transitions. [2023-12-09 15:03:21,282 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.848314606741573 [2023-12-09 15:03:21,282 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 302 transitions. [2023-12-09 15:03:21,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 302 transitions. [2023-12-09 15:03:21,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:21,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 302 transitions. [2023-12-09 15:03:21,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 151.0) internal successors, (302), 2 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:21,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:21,284 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:21,284 INFO L308 CegarLoopForPetriNet]: 157 programPoint places, 0 predicate places. [2023-12-09 15:03:21,284 INFO L500 AbstractCegarLoop]: Abstraction has has 157 places, 153 transitions, 389 flow [2023-12-09 15:03:21,284 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 126.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:21,284 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:21,284 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:21,285 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-09 15:03:21,285 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:21,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:21,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2024544234, now seen corresponding path program 1 times [2023-12-09 15:03:21,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:21,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10420618] [2023-12-09 15:03:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:21,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:21,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:21,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10420618] [2023-12-09 15:03:21,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10420618] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:21,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:21,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 15:03:21,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950781718] [2023-12-09 15:03:21,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:21,309 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 15:03:21,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:21,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 15:03:21,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 15:03:21,310 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 178 [2023-12-09 15:03:21,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 153 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:21,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:21,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 178 [2023-12-09 15:03:21,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:24,517 INFO L124 PetriNetUnfolderBase]: 11956/32094 cut-off events. [2023-12-09 15:03:24,518 INFO L125 PetriNetUnfolderBase]: For 6539/6873 co-relation queries the response was YES. [2023-12-09 15:03:24,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63339 conditions, 32094 events. 11956/32094 cut-off events. For 6539/6873 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 372521 event pairs, 7555 based on Foata normal form. 0/30999 useless extension candidates. Maximal degree in co-relation 7006. Up to 16847 conditions per place. [2023-12-09 15:03:24,730 INFO L140 encePairwiseOnDemand]: 175/178 looper letters, 39 selfloop transitions, 2 changer transitions 23/163 dead transitions. [2023-12-09 15:03:24,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 163 transitions, 515 flow [2023-12-09 15:03:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 15:03:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 15:03:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-12-09 15:03:24,732 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7415730337078652 [2023-12-09 15:03:24,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-12-09 15:03:24,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-12-09 15:03:24,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:24,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-12-09 15:03:24,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:24,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:24,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:24,735 INFO L308 CegarLoopForPetriNet]: 157 programPoint places, 2 predicate places. [2023-12-09 15:03:24,736 INFO L500 AbstractCegarLoop]: Abstraction has has 159 places, 163 transitions, 515 flow [2023-12-09 15:03:24,737 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:24,737 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:24,737 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:24,737 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-09 15:03:24,737 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:24,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:24,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1318264482, now seen corresponding path program 1 times [2023-12-09 15:03:24,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:24,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449006388] [2023-12-09 15:03:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:24,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:24,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:24,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449006388] [2023-12-09 15:03:24,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449006388] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 15:03:24,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959370071] [2023-12-09 15:03:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:24,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 15:03:24,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 15:03:24,802 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 15:03:24,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-09 15:03:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:24,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-09 15:03:24,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 15:03:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:24,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 15:03:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959370071] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 15:03:24,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 15:03:24,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-09 15:03:24,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133987609] [2023-12-09 15:03:24,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 15:03:24,938 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-09 15:03:24,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-09 15:03:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-09 15:03:24,940 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 178 [2023-12-09 15:03:24,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 163 transitions, 515 flow. Second operand has 10 states, 10 states have (on average 117.6) internal successors, (1176), 10 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:24,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:24,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 178 [2023-12-09 15:03:24,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:28,064 INFO L124 PetriNetUnfolderBase]: 12570/31830 cut-off events. [2023-12-09 15:03:28,065 INFO L125 PetriNetUnfolderBase]: For 19467/22953 co-relation queries the response was YES. [2023-12-09 15:03:28,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80744 conditions, 31830 events. 12570/31830 cut-off events. For 19467/22953 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 349375 event pairs, 932 based on Foata normal form. 3/29679 useless extension candidates. Maximal degree in co-relation 8759. Up to 16943 conditions per place. [2023-12-09 15:03:28,436 INFO L140 encePairwiseOnDemand]: 172/178 looper letters, 106 selfloop transitions, 9 changer transitions 23/236 dead transitions. [2023-12-09 15:03:28,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 236 transitions, 1177 flow [2023-12-09 15:03:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-09 15:03:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-09 15:03:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1158 transitions. [2023-12-09 15:03:28,439 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7228464419475655 [2023-12-09 15:03:28,439 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1158 transitions. [2023-12-09 15:03:28,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1158 transitions. [2023-12-09 15:03:28,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:28,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1158 transitions. [2023-12-09 15:03:28,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 128.66666666666666) internal successors, (1158), 9 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:28,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:28,444 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:28,444 INFO L308 CegarLoopForPetriNet]: 157 programPoint places, 10 predicate places. [2023-12-09 15:03:28,444 INFO L500 AbstractCegarLoop]: Abstraction has has 167 places, 236 transitions, 1177 flow [2023-12-09 15:03:28,445 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 117.6) internal successors, (1176), 10 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:28,445 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:28,445 INFO L233 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:28,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-09 15:03:28,650 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-09 15:03:28,650 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:28,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:28,651 INFO L85 PathProgramCache]: Analyzing trace with hash -777369052, now seen corresponding path program 1 times [2023-12-09 15:03:28,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:28,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282198418] [2023-12-09 15:03:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:28,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:28,667 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 15:03:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:28,688 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 15:03:28,688 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 15:03:28,688 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-12-09 15:03:28,688 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-09 15:03:28,688 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-09 15:03:28,689 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-09 15:03:28,689 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 15:03:28,689 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-09 15:03:28,715 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-12-09 15:03:28,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 211 transitions, 462 flow [2023-12-09 15:03:28,756 INFO L124 PetriNetUnfolderBase]: 91/607 cut-off events. [2023-12-09 15:03:28,756 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-12-09 15:03:28,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 607 events. 91/607 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2430 event pairs, 6 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 417. Up to 32 conditions per place. [2023-12-09 15:03:28,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 211 transitions, 462 flow [2023-12-09 15:03:28,763 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 211 transitions, 462 flow [2023-12-09 15:03:28,764 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 15:03:28,764 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5cce3cd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 15:03:28,764 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-09 15:03:28,766 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 15:03:28,766 INFO L124 PetriNetUnfolderBase]: 4/64 cut-off events. [2023-12-09 15:03:28,766 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 15:03:28,766 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:28,767 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:28,767 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:28,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:28,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1431042189, now seen corresponding path program 1 times [2023-12-09 15:03:28,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:28,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030931249] [2023-12-09 15:03:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:28,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:28,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030931249] [2023-12-09 15:03:28,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030931249] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:28,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:28,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 15:03:28,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954756619] [2023-12-09 15:03:28,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:28,781 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-09 15:03:28,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:28,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-09 15:03:28,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-09 15:03:28,782 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 211 [2023-12-09 15:03:28,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 211 transitions, 462 flow. Second operand has 2 states, 2 states have (on average 145.0) internal successors, (290), 2 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:28,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:28,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 211 [2023-12-09 15:03:28,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:42,003 INFO L124 PetriNetUnfolderBase]: 48200/116403 cut-off events. [2023-12-09 15:03:42,003 INFO L125 PetriNetUnfolderBase]: For 10382/10382 co-relation queries the response was YES. [2023-12-09 15:03:42,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184443 conditions, 116403 events. 48200/116403 cut-off events. For 10382/10382 co-relation queries the response was YES. Maximal size of possible extension queue 2778. Compared 1509092 event pairs, 47844 based on Foata normal form. 45768/159822 useless extension candidates. Maximal degree in co-relation 154710. Up to 63891 conditions per place. [2023-12-09 15:03:43,051 INFO L140 encePairwiseOnDemand]: 181/211 looper letters, 30 selfloop transitions, 0 changer transitions 24/180 dead transitions. [2023-12-09 15:03:43,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 180 transitions, 472 flow [2023-12-09 15:03:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-09 15:03:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-12-09 15:03:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 354 transitions. [2023-12-09 15:03:43,053 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8388625592417062 [2023-12-09 15:03:43,053 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 354 transitions. [2023-12-09 15:03:43,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 354 transitions. [2023-12-09 15:03:43,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:43,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 354 transitions. [2023-12-09 15:03:43,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 177.0) internal successors, (354), 2 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:43,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:43,055 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:43,056 INFO L308 CegarLoopForPetriNet]: 185 programPoint places, 0 predicate places. [2023-12-09 15:03:43,056 INFO L500 AbstractCegarLoop]: Abstraction has has 185 places, 180 transitions, 472 flow [2023-12-09 15:03:43,056 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.0) internal successors, (290), 2 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:43,056 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:43,056 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:43,056 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-09 15:03:43,059 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:43,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:43,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1237455363, now seen corresponding path program 1 times [2023-12-09 15:03:43,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:43,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555070380] [2023-12-09 15:03:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:43,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:43,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:43,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555070380] [2023-12-09 15:03:43,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555070380] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:43,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:43,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 15:03:43,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649561958] [2023-12-09 15:03:43,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:43,102 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 15:03:43,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:43,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 15:03:43,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 15:03:43,103 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 211 [2023-12-09 15:03:43,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 180 transitions, 472 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:43,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:43,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 211 [2023-12-09 15:03:43,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand