/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_28-funptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-a20a710-m [2023-12-09 15:02:40,742 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-09 15:02:40,820 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 15:02:40,857 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-09 15:02:40,857 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-09 15:02:40,858 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-09 15:02:40,858 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-09 15:02:40,859 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-09 15:02:40,859 INFO L153 SettingsManager]: * Use SBE=true [2023-12-09 15:02:40,859 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-09 15:02:40,860 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-09 15:02:40,860 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-09 15:02:40,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-09 15:02:40,861 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-09 15:02:40,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-09 15:02:40,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-09 15:02:40,861 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-09 15:02:40,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-09 15:02:40,862 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-09 15:02:40,862 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-09 15:02:40,863 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-09 15:02:40,863 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-09 15:02:40,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-09 15:02:40,864 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-09 15:02:40,864 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-09 15:02:40,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 15:02:40,865 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-09 15:02:40,865 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-09 15:02:40,869 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-09 15:02:40,869 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-09 15:02:40,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-09 15:02:40,870 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-09 15:02:40,870 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-09 15:02:40,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-12-09 15:02:41,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-09 15:02:41,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-09 15:02:41,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-09 15:02:41,138 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-09 15:02:41,139 INFO L274 PluginConnector]: CDTParser initialized [2023-12-09 15:02:41,140 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i [2023-12-09 15:02:42,297 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-09 15:02:42,559 INFO L384 CDTParser]: Found 1 translation units. [2023-12-09 15:02:42,560 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i [2023-12-09 15:02:42,574 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89de1bc6b/5ba3a884baf242b2a211dac6b57bf199/FLAG2fb6f253e [2023-12-09 15:02:42,586 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89de1bc6b/5ba3a884baf242b2a211dac6b57bf199 [2023-12-09 15:02:42,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-09 15:02:42,589 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-09 15:02:42,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-09 15:02:42,592 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-09 15:02:42,596 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-09 15:02:42,597 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:02:42" (1/1) ... [2023-12-09 15:02:42,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a2249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:42, skipping insertion in model container [2023-12-09 15:02:42,599 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:02:42" (1/1) ... [2023-12-09 15:02:42,646 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-09 15:02:42,972 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_28-funptr_racefree.i[41323,41336] [2023-12-09 15:02:42,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 15:02:43,013 INFO L202 MainTranslator]: Completed pre-run [2023-12-09 15:02:43,055 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_28-funptr_racefree.i[41323,41336] [2023-12-09 15:02:43,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 15:02:43,137 WARN L675 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-12-09 15:02:43,144 INFO L206 MainTranslator]: Completed translation [2023-12-09 15:02:43,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43 WrapperNode [2023-12-09 15:02:43,147 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-09 15:02:43,148 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-09 15:02:43,148 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-09 15:02:43,149 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-09 15:02:43,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (1/1) ... [2023-12-09 15:02:43,183 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (1/1) ... [2023-12-09 15:02:43,211 INFO L138 Inliner]: procedures = 274, calls = 51, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 144 [2023-12-09 15:02:43,211 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-09 15:02:43,212 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-09 15:02:43,212 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-09 15:02:43,212 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-09 15:02:43,219 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (1/1) ... [2023-12-09 15:02:43,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (1/1) ... [2023-12-09 15:02:43,226 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (1/1) ... [2023-12-09 15:02:43,226 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (1/1) ... [2023-12-09 15:02:43,252 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (1/1) ... [2023-12-09 15:02:43,256 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (1/1) ... [2023-12-09 15:02:43,268 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (1/1) ... [2023-12-09 15:02:43,269 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (1/1) ... [2023-12-09 15:02:43,272 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-09 15:02:43,273 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-09 15:02:43,273 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-09 15:02:43,273 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-09 15:02:43,276 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (1/1) ... [2023-12-09 15:02:43,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 15:02:43,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 15:02:43,320 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 15:02:43,328 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 15:02:43,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-09 15:02:43,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-09 15:02:43,344 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-09 15:02:43,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-09 15:02:43,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-09 15:02:43,345 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-09 15:02:43,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-09 15:02:43,345 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-09 15:02:43,345 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-09 15:02:43,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-09 15:02:43,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-09 15:02:43,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-09 15:02:43,347 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 15:02:43,469 INFO L241 CfgBuilder]: Building ICFG [2023-12-09 15:02:43,471 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-09 15:02:43,671 INFO L282 CfgBuilder]: Performing block encoding [2023-12-09 15:02:43,703 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-09 15:02:43,704 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-12-09 15:02:43,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:02:43 BoogieIcfgContainer [2023-12-09 15:02:43,705 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-09 15:02:43,708 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-09 15:02:43,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-09 15:02:43,711 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-09 15:02:43,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 03:02:42" (1/3) ... [2023-12-09 15:02:43,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5750ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:02:43, skipping insertion in model container [2023-12-09 15:02:43,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:02:43" (2/3) ... [2023-12-09 15:02:43,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5750ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:02:43, skipping insertion in model container [2023-12-09 15:02:43,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:02:43" (3/3) ... [2023-12-09 15:02:43,713 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2023-12-09 15:02:43,729 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-09 15:02:43,729 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-09 15:02:43,729 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-09 15:02:43,775 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-09 15:02:43,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 131 transitions, 269 flow [2023-12-09 15:02:43,860 INFO L124 PetriNetUnfolderBase]: 17/176 cut-off events. [2023-12-09 15:02:43,860 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 15:02:43,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 176 events. 17/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 439 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 91. Up to 4 conditions per place. [2023-12-09 15:02:43,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 131 transitions, 269 flow [2023-12-09 15:02:43,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 126 transitions, 256 flow [2023-12-09 15:02:43,883 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 15:02:43,889 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;@1083b1d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 15:02:43,890 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-09 15:02:43,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 15:02:43,914 INFO L124 PetriNetUnfolderBase]: 3/88 cut-off events. [2023-12-09 15:02:43,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 15:02:43,915 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:02:43,916 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:02:43,916 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:02:43,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:02:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash 270595860, now seen corresponding path program 1 times [2023-12-09 15:02:43,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:02:43,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917859035] [2023-12-09 15:02:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:02:43,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:02:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:02:44,103 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 15:02:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:02:44,176 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 15:02:44,178 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 15:02:44,179 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-12-09 15:02:44,180 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-09 15:02:44,181 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-09 15:02:44,182 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2023-12-09 15:02:44,186 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 15:02:44,186 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-09 15:02:44,220 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-09 15:02:44,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 174 transitions, 364 flow [2023-12-09 15:02:44,284 INFO L124 PetriNetUnfolderBase]: 31/290 cut-off events. [2023-12-09 15:02:44,284 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-12-09 15:02:44,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 290 events. 31/290 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 942 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2023-12-09 15:02:44,289 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 174 transitions, 364 flow [2023-12-09 15:02:44,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 174 transitions, 364 flow [2023-12-09 15:02:44,293 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 15:02:44,295 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;@1083b1d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 15:02:44,295 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-09 15:02:44,312 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 15:02:44,312 INFO L124 PetriNetUnfolderBase]: 3/91 cut-off events. [2023-12-09 15:02:44,312 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 15:02:44,312 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:02:44,313 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, 1, 1] [2023-12-09 15:02:44,313 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:02:44,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:02:44,314 INFO L85 PathProgramCache]: Analyzing trace with hash -605133248, now seen corresponding path program 1 times [2023-12-09 15:02:44,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:02:44,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429250940] [2023-12-09 15:02:44,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:02:44,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:02:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:02:44,517 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 15:02:44,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:02:44,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429250940] [2023-12-09 15:02:44,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429250940] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:02:44,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:02:44,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 15:02:44,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562457334] [2023-12-09 15:02:44,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:02:44,525 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 15:02:44,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:02:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 15:02:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 15:02:44,560 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 174 [2023-12-09 15:02:44,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 174 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 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 15:02:44,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:02:44,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 174 [2023-12-09 15:02:44,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:02:45,683 INFO L124 PetriNetUnfolderBase]: 2082/6796 cut-off events. [2023-12-09 15:02:45,683 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-12-09 15:02:45,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10215 conditions, 6796 events. 2082/6796 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 64992 event pairs, 960 based on Foata normal form. 1320/7673 useless extension candidates. Maximal degree in co-relation 1038. Up to 3338 conditions per place. [2023-12-09 15:02:45,733 INFO L140 encePairwiseOnDemand]: 154/174 looper letters, 40 selfloop transitions, 2 changer transitions 22/168 dead transitions. [2023-12-09 15:02:45,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 168 transitions, 446 flow [2023-12-09 15:02:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 15:02:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 15:02:45,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-12-09 15:02:45,750 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2023-12-09 15:02:45,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-12-09 15:02:45,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-12-09 15:02:45,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:02:45,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-12-09 15:02:45,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 15:02:45,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 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 15:02:45,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 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 15:02:45,770 INFO L308 CegarLoopForPetriNet]: 160 programPoint places, 1 predicate places. [2023-12-09 15:02:45,770 INFO L500 AbstractCegarLoop]: Abstraction has has 161 places, 168 transitions, 446 flow [2023-12-09 15:02:45,771 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 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 15:02:45,771 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:02:45,771 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:02:45,771 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-09 15:02:45,772 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:02:45,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:02:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1259264640, now seen corresponding path program 1 times [2023-12-09 15:02:45,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:02:45,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37326608] [2023-12-09 15:02:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:02:45,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:02:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:02:45,824 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 15:02:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:02:45,869 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 15:02:45,870 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 15:02:45,870 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-12-09 15:02:45,870 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-09 15:02:45,871 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-09 15:02:45,871 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 15:02:45,872 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 15:02:45,872 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-09 15:02:45,924 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-09 15:02:45,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 217 transitions, 461 flow [2023-12-09 15:02:45,985 INFO L124 PetriNetUnfolderBase]: 50/439 cut-off events. [2023-12-09 15:02:45,985 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-12-09 15:02:45,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 439 events. 50/439 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1639 event pairs, 1 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 298. Up to 16 conditions per place. [2023-12-09 15:02:45,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 217 transitions, 461 flow [2023-12-09 15:02:45,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 217 transitions, 461 flow [2023-12-09 15:02:45,997 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 15:02:46,002 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;@1083b1d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 15:02:46,002 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-09 15:02:46,010 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 15:02:46,010 INFO L124 PetriNetUnfolderBase]: 3/91 cut-off events. [2023-12-09 15:02:46,010 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 15:02:46,010 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:02:46,011 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, 1, 1] [2023-12-09 15:02:46,011 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:02:46,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:02:46,011 INFO L85 PathProgramCache]: Analyzing trace with hash -913384423, now seen corresponding path program 1 times [2023-12-09 15:02:46,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:02:46,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70545286] [2023-12-09 15:02:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:02:46,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:02:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:02:46,116 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 15:02:46,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:02:46,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70545286] [2023-12-09 15:02:46,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70545286] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:02:46,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:02:46,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 15:02:46,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230670989] [2023-12-09 15:02:46,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:02:46,117 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 15:02:46,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:02:46,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 15:02:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 15:02:46,120 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 217 [2023-12-09 15:02:46,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 217 transitions, 461 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 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 15:02:46,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:02:46,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 217 [2023-12-09 15:02:46,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:02:56,337 INFO L124 PetriNetUnfolderBase]: 29495/77286 cut-off events. [2023-12-09 15:02:56,337 INFO L125 PetriNetUnfolderBase]: For 1395/1395 co-relation queries the response was YES. [2023-12-09 15:02:56,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119271 conditions, 77286 events. 29495/77286 cut-off events. For 1395/1395 co-relation queries the response was YES. Maximal size of possible extension queue 1671. Compared 984328 event pairs, 24181 based on Foata normal form. 17552/93079 useless extension candidates. Maximal degree in co-relation 10712. Up to 41299 conditions per place. [2023-12-09 15:02:56,861 INFO L140 encePairwiseOnDemand]: 191/217 looper letters, 49 selfloop transitions, 2 changer transitions 23/205 dead transitions. [2023-12-09 15:02:56,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 205 transitions, 551 flow [2023-12-09 15:02:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 15:02:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 15:02:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2023-12-09 15:02:56,865 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8172043010752689 [2023-12-09 15:02:56,865 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2023-12-09 15:02:56,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2023-12-09 15:02:56,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:02:56,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2023-12-09 15:02:56,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 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 15:02:56,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 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 15:02:56,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 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 15:02:56,874 INFO L308 CegarLoopForPetriNet]: 198 programPoint places, 1 predicate places. [2023-12-09 15:02:56,874 INFO L500 AbstractCegarLoop]: Abstraction has has 199 places, 205 transitions, 551 flow [2023-12-09 15:02:56,875 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 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 15:02:56,875 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:02:56,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:02:56,875 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-09 15:02:56,876 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:02:56,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:02:56,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1314046345, now seen corresponding path program 1 times [2023-12-09 15:02:56,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:02:56,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431879522] [2023-12-09 15:02:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:02:56,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:02:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:02:57,012 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 15:02:57,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:02:57,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431879522] [2023-12-09 15:02:57,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431879522] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 15:02:57,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557806632] [2023-12-09 15:02:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:02:57,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 15:02:57,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 15:02:57,020 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 15:02:57,026 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 15:02:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:02:57,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-09 15:02:57,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 15:02:57,193 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 15:02:57,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 15:02:57,237 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 15:02:57,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557806632] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 15:02:57,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 15:02:57,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-09 15:02:57,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099566923] [2023-12-09 15:02:57,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 15:02:57,239 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-09 15:02:57,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:02:57,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-09 15:02:57,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-09 15:02:57,243 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 217 [2023-12-09 15:02:57,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 205 transitions, 551 flow. Second operand has 10 states, 10 states have (on average 149.8) internal successors, (1498), 10 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:02:57,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:02:57,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 217 [2023-12-09 15:02:57,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:05,179 INFO L124 PetriNetUnfolderBase]: 30285/72197 cut-off events. [2023-12-09 15:03:05,180 INFO L125 PetriNetUnfolderBase]: For 14708/21927 co-relation queries the response was YES. [2023-12-09 15:03:05,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156649 conditions, 72197 events. 30285/72197 cut-off events. For 14708/21927 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 845742 event pairs, 1973 based on Foata normal form. 6/68331 useless extension candidates. Maximal degree in co-relation 13558. Up to 41459 conditions per place. [2023-12-09 15:03:05,751 INFO L140 encePairwiseOnDemand]: 211/217 looper letters, 138 selfloop transitions, 9 changer transitions 23/300 dead transitions. [2023-12-09 15:03:05,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 300 transitions, 1233 flow [2023-12-09 15:03:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-09 15:03:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-09 15:03:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1478 transitions. [2023-12-09 15:03:05,755 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.756784434203789 [2023-12-09 15:03:05,755 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1478 transitions. [2023-12-09 15:03:05,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1478 transitions. [2023-12-09 15:03:05,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:05,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1478 transitions. [2023-12-09 15:03:05,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 164.22222222222223) internal successors, (1478), 9 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:05,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 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 15:03:05,763 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 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 15:03:05,765 INFO L308 CegarLoopForPetriNet]: 198 programPoint places, 9 predicate places. [2023-12-09 15:03:05,766 INFO L500 AbstractCegarLoop]: Abstraction has has 207 places, 300 transitions, 1233 flow [2023-12-09 15:03:05,767 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 149.8) internal successors, (1498), 10 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 15:03:05,767 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:05,767 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:05,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-09 15:03:05,972 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 15:03:05,972 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:05,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:05,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2021067391, now seen corresponding path program 1 times [2023-12-09 15:03:05,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:05,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352791898] [2023-12-09 15:03:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:05,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:06,000 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 15:03:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:06,042 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 15:03:06,042 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 15:03:06,042 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-12-09 15:03:06,042 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-09 15:03:06,043 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-09 15:03:06,043 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-09 15:03:06,043 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 15:03:06,043 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-09 15:03:06,085 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-12-09 15:03:06,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 260 transitions, 560 flow [2023-12-09 15:03:06,160 INFO L124 PetriNetUnfolderBase]: 81/660 cut-off events. [2023-12-09 15:03:06,160 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-12-09 15:03:06,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 660 events. 81/660 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2748 event pairs, 6 based on Foata normal form. 0/574 useless extension candidates. Maximal degree in co-relation 459. Up to 32 conditions per place. [2023-12-09 15:03:06,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 260 transitions, 560 flow [2023-12-09 15:03:06,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 260 transitions, 560 flow [2023-12-09 15:03:06,181 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 15:03:06,184 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;@1083b1d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 15:03:06,184 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-09 15:03:06,189 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 15:03:06,189 INFO L124 PetriNetUnfolderBase]: 3/91 cut-off events. [2023-12-09 15:03:06,189 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 15:03:06,189 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:06,189 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, 1, 1] [2023-12-09 15:03:06,191 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-09 15:03:06,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash -134754019, now seen corresponding path program 1 times [2023-12-09 15:03:06,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:06,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058087795] [2023-12-09 15:03:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:06,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:06,235 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 15:03:06,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:06,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058087795] [2023-12-09 15:03:06,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058087795] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:06,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:06,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 15:03:06,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542143655] [2023-12-09 15:03:06,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:06,237 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 15:03:06,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:06,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 15:03:06,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 15:03:06,238 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 260 [2023-12-09 15:03:06,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 260 transitions, 560 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 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 15:03:06,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:06,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 260 [2023-12-09 15:03:06,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand