/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.data.races.in.concurrent.programs true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 18:14:24,536 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 18:14:24,614 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-VariableLbe.epf [2023-08-25 18:14:24,617 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 18:14:24,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 18:14:24,649 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 18:14:24,649 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 18:14:24,650 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 18:14:24,650 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 18:14:24,654 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 18:14:24,654 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 18:14:24,654 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 18:14:24,654 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 18:14:24,656 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 18:14:24,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 18:14:24,656 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 18:14:24,656 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 18:14:24,656 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 18:14:24,657 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 18:14:24,657 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 18:14:24,657 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 18:14:24,657 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 18:14:24,658 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 18:14:24,658 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 18:14:24,658 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 18:14:24,658 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 18:14:24,659 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 18:14:24,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:14:24,659 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 18:14:24,659 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 18:14:24,660 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 18:14:24,660 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 18:14:24,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 18:14:24,661 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 18:14:24,661 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 18:14:24,661 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 18:14:24,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 18:14:24,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 18:14:24,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 18:14:24,970 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 18:14:24,971 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 18:14:24,972 INFO L431 ainManager$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 [2023-08-25 18:14:26,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 18:14:26,255 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 18:14:26,255 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-25 18:14:26,274 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/252448478/1618ae991b224d34a0db9b06b3978d14/FLAG0581f38e4 [2023-08-25 18:14:26,287 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/252448478/1618ae991b224d34a0db9b06b3978d14 [2023-08-25 18:14:26,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 18:14:26,292 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 18:14:26,294 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 18:14:26,294 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 18:14:26,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 18:14:26,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,296 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@595110ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26, skipping insertion in model container [2023-08-25 18:14:26,297 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,326 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 18:14:26,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:14:26,658 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 18:14:26,687 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:14:26,689 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:14:26,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:14:26,754 INFO L206 MainTranslator]: Completed translation [2023-08-25 18:14:26,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26 WrapperNode [2023-08-25 18:14:26,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 18:14:26,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 18:14:26,755 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 18:14:26,755 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 18:14:26,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,809 INFO L138 Inliner]: procedures = 171, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2023-08-25 18:14:26,809 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 18:14:26,810 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 18:14:26,811 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 18:14:26,811 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 18:14:26,818 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,836 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,841 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,845 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,846 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 18:14:26,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 18:14:26,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 18:14:26,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 18:14:26,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (1/1) ... [2023-08-25 18:14:26,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:14:26,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:14:26,890 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) [2023-08-25 18:14:26,893 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 [2023-08-25 18:14:26,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-25 18:14:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 18:14:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-25 18:14:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 18:14:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 18:14:26,925 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-25 18:14:26,925 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-25 18:14:26,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 18:14:26,925 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-25 18:14:26,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 18:14:26,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 18:14:26,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 18:14:26,927 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-25 18:14:27,073 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 18:14:27,074 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 18:14:27,246 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 18:14:27,252 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 18:14:27,252 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-25 18:14:27,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:14:27 BoogieIcfgContainer [2023-08-25 18:14:27,254 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 18:14:27,256 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 18:14:27,256 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 18:14:27,258 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 18:14:27,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:14:26" (1/3) ... [2023-08-25 18:14:27,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6004a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:14:27, skipping insertion in model container [2023-08-25 18:14:27,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:14:26" (2/3) ... [2023-08-25 18:14:27,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6004a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:14:27, skipping insertion in model container [2023-08-25 18:14:27,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:14:27" (3/3) ... [2023-08-25 18:14:27,262 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-08-25 18:14:27,275 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 18:14:27,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-25 18:14:27,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 18:14:27,325 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-25 18:14:27,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 134 transitions, 276 flow [2023-08-25 18:14:27,408 INFO L124 PetriNetUnfolderBase]: 23/186 cut-off events. [2023-08-25 18:14:27,408 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-25 18:14:27,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 186 events. 23/186 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 596 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2023-08-25 18:14:27,414 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 134 transitions, 276 flow [2023-08-25 18:14:27,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 129 transitions, 263 flow [2023-08-25 18:14:27,421 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:14:27,428 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 129 transitions, 263 flow [2023-08-25 18:14:27,430 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 129 transitions, 263 flow [2023-08-25 18:14:27,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 129 transitions, 263 flow [2023-08-25 18:14:27,466 INFO L124 PetriNetUnfolderBase]: 22/181 cut-off events. [2023-08-25 18:14:27,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:14:27,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 181 events. 22/181 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 586 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2023-08-25 18:14:27,472 INFO L119 LiptonReduction]: Number of co-enabled transitions 5104 [2023-08-25 18:14:30,043 INFO L134 LiptonReduction]: Checked pairs total: 13006 [2023-08-25 18:14:30,044 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-25 18:14:30,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:14:30,060 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:14:30,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:14:30,064 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:14:30,064 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2023-08-25 18:14:30,064 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:14:30,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:14:30,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-25 18:14:30,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:14:30,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:14:30,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2101686935, now seen corresponding path program 1 times [2023-08-25 18:14:30,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:14:30,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173517238] [2023-08-25 18:14:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:14:30,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:14:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:30,179 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:14:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:30,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:14:30,216 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:14:30,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:14:30,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 18:14:30,219 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:14:30,221 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:14:30,222 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:14:30,222 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 18:14:30,251 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-25 18:14:30,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 180 transitions, 378 flow [2023-08-25 18:14:30,308 INFO L124 PetriNetUnfolderBase]: 40/315 cut-off events. [2023-08-25 18:14:30,309 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:14:30,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 315 events. 40/315 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1164 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 188. Up to 9 conditions per place. [2023-08-25 18:14:30,312 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 180 transitions, 378 flow [2023-08-25 18:14:30,314 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 180 transitions, 378 flow [2023-08-25 18:14:30,314 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:14:30,314 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 180 transitions, 378 flow [2023-08-25 18:14:30,314 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 180 transitions, 378 flow [2023-08-25 18:14:30,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 180 transitions, 378 flow [2023-08-25 18:14:30,350 INFO L124 PetriNetUnfolderBase]: 40/315 cut-off events. [2023-08-25 18:14:30,350 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:14:30,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 315 events. 40/315 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1164 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 188. Up to 9 conditions per place. [2023-08-25 18:14:30,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 15048 [2023-08-25 18:14:32,870 INFO L134 LiptonReduction]: Checked pairs total: 45056 [2023-08-25 18:14:32,871 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-25 18:14:32,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:14:32,873 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:14:32,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:14:32,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:14:32,884 INFO L124 PetriNetUnfolderBase]: 15/81 cut-off events. [2023-08-25 18:14:32,884 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-25 18:14:32,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:14:32,884 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-25 18:14:32,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:14:32,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:14:32,886 INFO L85 PathProgramCache]: Analyzing trace with hash -308348679, now seen corresponding path program 1 times [2023-08-25 18:14:32,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:14:32,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947858108] [2023-08-25 18:14:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:14:32,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:14:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:32,941 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:14:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:32,970 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:14:32,970 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:14:32,970 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:14:32,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-25 18:14:32,970 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:14:32,971 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:14:32,971 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:14:32,971 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 18:14:33,017 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-25 18:14:33,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 226 transitions, 482 flow [2023-08-25 18:14:33,081 INFO L124 PetriNetUnfolderBase]: 62/489 cut-off events. [2023-08-25 18:14:33,082 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:14:33,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 489 events. 62/489 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1976 event pairs, 1 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 323. Up to 16 conditions per place. [2023-08-25 18:14:33,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 226 transitions, 482 flow [2023-08-25 18:14:33,088 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 226 transitions, 482 flow [2023-08-25 18:14:33,089 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:14:33,089 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 226 transitions, 482 flow [2023-08-25 18:14:33,089 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 226 transitions, 482 flow [2023-08-25 18:14:33,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 226 transitions, 482 flow [2023-08-25 18:14:33,170 INFO L124 PetriNetUnfolderBase]: 62/489 cut-off events. [2023-08-25 18:14:33,170 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:14:33,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 489 events. 62/489 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1976 event pairs, 1 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 323. Up to 16 conditions per place. [2023-08-25 18:14:33,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 28776 [2023-08-25 18:14:35,537 INFO L134 LiptonReduction]: Checked pairs total: 101763 [2023-08-25 18:14:35,538 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-25 18:14:35,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:14:35,540 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:14:35,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:14:35,549 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:14:35,549 INFO L124 PetriNetUnfolderBase]: 22/127 cut-off events. [2023-08-25 18:14:35,549 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-25 18:14:35,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:14:35,550 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-25 18:14:35,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:14:35,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:14:35,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2114236356, now seen corresponding path program 1 times [2023-08-25 18:14:35,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:14:35,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325193798] [2023-08-25 18:14:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:14:35,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:14:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:35,572 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:14:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:35,591 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:14:35,591 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:14:35,591 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:14:35,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-25 18:14:35,591 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:14:35,592 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:14:35,592 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:14:35,592 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-25 18:14:35,613 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-25 18:14:35,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 272 transitions, 588 flow [2023-08-25 18:14:35,709 INFO L124 PetriNetUnfolderBase]: 96/755 cut-off events. [2023-08-25 18:14:35,709 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:14:35,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 755 events. 96/755 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3368 event pairs, 6 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 509. Up to 32 conditions per place. [2023-08-25 18:14:35,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 272 transitions, 588 flow [2023-08-25 18:14:35,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 245 places, 272 transitions, 588 flow [2023-08-25 18:14:35,728 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:14:35,728 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 245 places, 272 transitions, 588 flow [2023-08-25 18:14:35,728 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 245 places, 272 transitions, 588 flow [2023-08-25 18:14:35,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 272 transitions, 588 flow [2023-08-25 18:14:35,829 INFO L124 PetriNetUnfolderBase]: 96/755 cut-off events. [2023-08-25 18:14:35,829 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:14:35,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 755 events. 96/755 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3368 event pairs, 6 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 509. Up to 32 conditions per place. [2023-08-25 18:14:35,865 INFO L119 LiptonReduction]: Number of co-enabled transitions 46640 [2023-08-25 18:14:38,247 INFO L134 LiptonReduction]: Checked pairs total: 183017 [2023-08-25 18:14:38,247 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-25 18:14:38,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:14:38,250 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:14:38,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:14:38,265 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:14:38,265 INFO L124 PetriNetUnfolderBase]: 34/190 cut-off events. [2023-08-25 18:14:38,265 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-25 18:14:38,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:14:38,265 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-25 18:14:38,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:14:38,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:14:38,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1917388478, now seen corresponding path program 1 times [2023-08-25 18:14:38,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:14:38,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424298064] [2023-08-25 18:14:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:14:38,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:14:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:38,288 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:14:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:38,308 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:14:38,308 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:14:38,308 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:14:38,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 18:14:38,308 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:14:38,309 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:14:38,309 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:14:38,309 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-25 18:14:38,330 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-25 18:14:38,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 286 places, 318 transitions, 696 flow [2023-08-25 18:14:38,558 INFO L124 PetriNetUnfolderBase]: 158/1209 cut-off events. [2023-08-25 18:14:38,558 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:14:38,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 1209 events. 158/1209 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 6219 event pairs, 23 based on Foata normal form. 0/1003 useless extension candidates. Maximal degree in co-relation 800. Up to 80 conditions per place. [2023-08-25 18:14:38,571 INFO L82 GeneralOperation]: Start removeDead. Operand has 286 places, 318 transitions, 696 flow [2023-08-25 18:14:38,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 286 places, 318 transitions, 696 flow [2023-08-25 18:14:38,584 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:14:38,584 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 286 places, 318 transitions, 696 flow [2023-08-25 18:14:38,584 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 286 places, 318 transitions, 696 flow [2023-08-25 18:14:38,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 286 places, 318 transitions, 696 flow [2023-08-25 18:14:38,773 INFO L124 PetriNetUnfolderBase]: 158/1209 cut-off events. [2023-08-25 18:14:38,773 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:14:38,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 1209 events. 158/1209 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 6219 event pairs, 23 based on Foata normal form. 0/1003 useless extension candidates. Maximal degree in co-relation 800. Up to 80 conditions per place. [2023-08-25 18:14:38,843 INFO L119 LiptonReduction]: Number of co-enabled transitions 68640 [2023-08-25 18:14:41,210 INFO L134 LiptonReduction]: Checked pairs total: 273846 [2023-08-25 18:14:41,210 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-08-25 18:14:41,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:14:41,213 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:14:41,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:14:41,233 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:14:41,234 INFO L124 PetriNetUnfolderBase]: 48/259 cut-off events. [2023-08-25 18:14:41,234 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-25 18:14:41,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:14:41,234 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:14:41,234 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:14:41,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:14:41,234 INFO L85 PathProgramCache]: Analyzing trace with hash -33903346, now seen corresponding path program 1 times [2023-08-25 18:14:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:14:41,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006756080] [2023-08-25 18:14:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:14:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:14:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:41,282 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:14:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:41,304 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:14:41,304 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:14:41,304 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:14:41,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 18:14:41,314 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:14:41,314 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:14:41,315 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:14:41,315 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-25 18:14:41,344 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-25 18:14:41,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 364 transitions, 806 flow [2023-08-25 18:14:41,725 INFO L124 PetriNetUnfolderBase]: 284/2047 cut-off events. [2023-08-25 18:14:41,725 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:14:41,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2279 conditions, 2047 events. 284/2047 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 12846 event pairs, 72 based on Foata normal form. 0/1725 useless extension candidates. Maximal degree in co-relation 1308. Up to 192 conditions per place. [2023-08-25 18:14:41,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 364 transitions, 806 flow [2023-08-25 18:14:41,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 327 places, 364 transitions, 806 flow [2023-08-25 18:14:41,769 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:14:41,769 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 327 places, 364 transitions, 806 flow [2023-08-25 18:14:41,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 327 places, 364 transitions, 806 flow [2023-08-25 18:14:41,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 364 transitions, 806 flow [2023-08-25 18:14:42,151 INFO L124 PetriNetUnfolderBase]: 284/2047 cut-off events. [2023-08-25 18:14:42,152 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:14:42,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2279 conditions, 2047 events. 284/2047 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 12846 event pairs, 72 based on Foata normal form. 0/1725 useless extension candidates. Maximal degree in co-relation 1308. Up to 192 conditions per place. [2023-08-25 18:14:42,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 94776 [2023-08-25 18:14:44,910 INFO L134 LiptonReduction]: Checked pairs total: 432620 [2023-08-25 18:14:44,910 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-08-25 18:14:44,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:14:44,913 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:14:44,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:14:44,946 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:14:44,946 INFO L124 PetriNetUnfolderBase]: 65/339 cut-off events. [2023-08-25 18:14:44,946 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-25 18:14:44,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:14:44,946 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:14:44,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:14:44,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:14:44,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1303129320, now seen corresponding path program 1 times [2023-08-25 18:14:44,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:14:44,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351138872] [2023-08-25 18:14:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:14:44,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:14:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:44,980 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:14:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:44,998 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:14:44,999 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:14:44,999 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:14:44,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-25 18:14:44,999 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:14:45,005 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:14:45,006 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:14:45,006 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-25 18:14:45,038 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-25 18:14:45,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 368 places, 410 transitions, 918 flow [2023-08-25 18:14:45,798 INFO L124 PetriNetUnfolderBase]: 554/3669 cut-off events. [2023-08-25 18:14:45,799 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:14:45,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4167 conditions, 3669 events. 554/3669 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 27205 event pairs, 201 based on Foata normal form. 0/3135 useless extension candidates. Maximal degree in co-relation 2265. Up to 448 conditions per place. [2023-08-25 18:14:45,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 368 places, 410 transitions, 918 flow [2023-08-25 18:14:45,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 368 places, 410 transitions, 918 flow [2023-08-25 18:14:45,881 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:14:45,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 368 places, 410 transitions, 918 flow [2023-08-25 18:14:45,882 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 368 places, 410 transitions, 918 flow [2023-08-25 18:14:45,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 368 places, 410 transitions, 918 flow [2023-08-25 18:14:46,522 INFO L124 PetriNetUnfolderBase]: 554/3669 cut-off events. [2023-08-25 18:14:46,523 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:14:46,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4167 conditions, 3669 events. 554/3669 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 27205 event pairs, 201 based on Foata normal form. 0/3135 useless extension candidates. Maximal degree in co-relation 2265. Up to 448 conditions per place. [2023-08-25 18:14:46,798 INFO L119 LiptonReduction]: Number of co-enabled transitions 125048 [2023-08-25 18:14:49,449 INFO L134 LiptonReduction]: Checked pairs total: 525096 [2023-08-25 18:14:49,449 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-25 18:14:49,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:14:49,451 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:14:49,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:14:49,483 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:14:49,483 INFO L124 PetriNetUnfolderBase]: 87/437 cut-off events. [2023-08-25 18:14:49,483 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-25 18:14:49,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:14:49,483 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:14:49,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:14:49,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:14:49,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1753919761, now seen corresponding path program 1 times [2023-08-25 18:14:49,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:14:49,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680963896] [2023-08-25 18:14:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:14:49,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:14:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:49,513 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:14:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:49,549 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:14:49,549 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:14:49,549 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:14:49,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-25 18:14:49,550 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:14:49,550 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:14:49,550 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:14:49,550 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-25 18:14:49,585 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-25 18:14:49,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 409 places, 456 transitions, 1032 flow [2023-08-25 18:14:51,198 INFO L124 PetriNetUnfolderBase]: 1144/6891 cut-off events. [2023-08-25 18:14:51,198 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:14:51,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7976 conditions, 6891 events. 1144/6891 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 60429 event pairs, 522 based on Foata normal form. 0/5953 useless extension candidates. Maximal degree in co-relation 4151. Up to 1024 conditions per place. [2023-08-25 18:14:51,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 409 places, 456 transitions, 1032 flow [2023-08-25 18:14:51,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 409 places, 456 transitions, 1032 flow [2023-08-25 18:14:51,375 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:14:51,376 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 409 places, 456 transitions, 1032 flow [2023-08-25 18:14:51,376 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 409 places, 456 transitions, 1032 flow [2023-08-25 18:14:51,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 409 places, 456 transitions, 1032 flow [2023-08-25 18:14:52,746 INFO L124 PetriNetUnfolderBase]: 1144/6891 cut-off events. [2023-08-25 18:14:52,746 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:14:52,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7976 conditions, 6891 events. 1144/6891 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 60429 event pairs, 522 based on Foata normal form. 0/5953 useless extension candidates. Maximal degree in co-relation 4151. Up to 1024 conditions per place. [2023-08-25 18:14:53,216 INFO L119 LiptonReduction]: Number of co-enabled transitions 159456 [2023-08-25 18:14:56,152 INFO L134 LiptonReduction]: Checked pairs total: 667344 [2023-08-25 18:14:56,153 INFO L136 LiptonReduction]: Total number of compositions: 231 [2023-08-25 18:14:56,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:14:56,154 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:14:56,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:14:56,199 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:14:56,200 INFO L124 PetriNetUnfolderBase]: 114/558 cut-off events. [2023-08-25 18:14:56,200 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2023-08-25 18:14:56,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:14:56,200 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:14:56,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:14:56,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:14:56,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1768937069, now seen corresponding path program 1 times [2023-08-25 18:14:56,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:14:56,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247635015] [2023-08-25 18:14:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:14:56,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:14:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:56,218 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:14:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:56,239 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:14:56,239 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:14:56,239 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:14:56,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 18:14:56,239 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:14:56,239 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:14:56,240 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:14:56,240 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-25 18:14:56,277 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-25 18:14:56,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 450 places, 502 transitions, 1148 flow [2023-08-25 18:14:59,304 INFO L124 PetriNetUnfolderBase]: 2438/13377 cut-off events. [2023-08-25 18:14:59,304 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:14:59,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15754 conditions, 13377 events. 2438/13377 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 135893 event pairs, 1291 based on Foata normal form. 0/11651 useless extension candidates. Maximal degree in co-relation 7958. Up to 2304 conditions per place. [2023-08-25 18:14:59,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 450 places, 502 transitions, 1148 flow [2023-08-25 18:14:59,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 450 places, 502 transitions, 1148 flow [2023-08-25 18:14:59,589 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:14:59,589 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 450 places, 502 transitions, 1148 flow [2023-08-25 18:14:59,589 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 450 places, 502 transitions, 1148 flow [2023-08-25 18:14:59,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 450 places, 502 transitions, 1148 flow [2023-08-25 18:15:02,646 INFO L124 PetriNetUnfolderBase]: 2438/13377 cut-off events. [2023-08-25 18:15:02,647 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:15:02,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15754 conditions, 13377 events. 2438/13377 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 135893 event pairs, 1291 based on Foata normal form. 0/11651 useless extension candidates. Maximal degree in co-relation 7958. Up to 2304 conditions per place. [2023-08-25 18:15:03,571 INFO L119 LiptonReduction]: Number of co-enabled transitions 198000 [2023-08-25 18:15:06,707 INFO L134 LiptonReduction]: Checked pairs total: 847035 [2023-08-25 18:15:06,707 INFO L136 LiptonReduction]: Total number of compositions: 254 [2023-08-25 18:15:06,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:15:06,710 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:15:06,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:15:06,779 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:15:06,779 INFO L124 PetriNetUnfolderBase]: 139/692 cut-off events. [2023-08-25 18:15:06,779 INFO L125 PetriNetUnfolderBase]: For 285/285 co-relation queries the response was YES. [2023-08-25 18:15:06,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:15:06,779 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:15:06,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:15:06,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:15:06,780 INFO L85 PathProgramCache]: Analyzing trace with hash -749224426, now seen corresponding path program 1 times [2023-08-25 18:15:06,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:15:06,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182453859] [2023-08-25 18:15:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:15:06,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:15:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:15:06,799 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:15:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:15:06,826 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:15:06,826 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:15:06,826 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:15:06,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-25 18:15:06,827 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:15:06,830 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:15:06,830 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:15:06,830 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-25 18:15:06,866 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-25 18:15:06,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 491 places, 548 transitions, 1266 flow [2023-08-25 18:15:13,819 INFO L124 PetriNetUnfolderBase]: 5268/26519 cut-off events. [2023-08-25 18:15:13,820 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:15:14,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31725 conditions, 26519 events. 5268/26519 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 305198 event pairs, 3084 based on Foata normal form. 0/23237 useless extension candidates. Maximal degree in co-relation 15734. Up to 5120 conditions per place. [2023-08-25 18:15:14,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 491 places, 548 transitions, 1266 flow [2023-08-25 18:15:14,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 491 places, 548 transitions, 1266 flow [2023-08-25 18:15:14,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:15:14,472 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 491 places, 548 transitions, 1266 flow [2023-08-25 18:15:14,472 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 491 places, 548 transitions, 1266 flow [2023-08-25 18:15:14,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 491 places, 548 transitions, 1266 flow [2023-08-25 18:15:21,516 INFO L124 PetriNetUnfolderBase]: 5268/26519 cut-off events. [2023-08-25 18:15:21,516 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:15:21,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31725 conditions, 26519 events. 5268/26519 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 305198 event pairs, 3084 based on Foata normal form. 0/23237 useless extension candidates. Maximal degree in co-relation 15734. Up to 5120 conditions per place. [2023-08-25 18:15:23,399 INFO L119 LiptonReduction]: Number of co-enabled transitions 240680 [2023-08-25 18:15:26,558 INFO L134 LiptonReduction]: Checked pairs total: 1041222 [2023-08-25 18:15:26,558 INFO L136 LiptonReduction]: Total number of compositions: 271 [2023-08-25 18:15:26,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:15:26,560 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:15:26,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:15:26,699 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:15:26,699 INFO L124 PetriNetUnfolderBase]: 226/965 cut-off events. [2023-08-25 18:15:26,699 INFO L125 PetriNetUnfolderBase]: For 432/432 co-relation queries the response was YES. [2023-08-25 18:15:26,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:15:26,700 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:15:26,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:15:26,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:15:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash -931924441, now seen corresponding path program 1 times [2023-08-25 18:15:26,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:15:26,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9134850] [2023-08-25 18:15:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:15:26,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:15:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:15:26,720 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:15:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:15:26,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:15:26,739 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:15:26,739 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:15:26,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-25 18:15:26,739 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:15:26,740 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:15:26,740 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:15:26,740 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-25 18:15:26,780 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-25 18:15:26,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 532 places, 594 transitions, 1386 flow [2023-08-25 18:15:42,171 INFO L124 PetriNetUnfolderBase]: 11426/53229 cut-off events. [2023-08-25 18:15:42,171 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:15:43,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64593 conditions, 53229 events. 11426/53229 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 685306 event pairs, 7181 based on Foata normal form. 0/46855 useless extension candidates. Maximal degree in co-relation 31704. Up to 11264 conditions per place. [2023-08-25 18:15:43,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 532 places, 594 transitions, 1386 flow [2023-08-25 18:15:43,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 532 places, 594 transitions, 1386 flow [2023-08-25 18:15:43,923 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:15:43,923 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 532 places, 594 transitions, 1386 flow [2023-08-25 18:15:43,924 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 532 places, 594 transitions, 1386 flow [2023-08-25 18:15:43,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 532 places, 594 transitions, 1386 flow [2023-08-25 18:15:58,945 INFO L124 PetriNetUnfolderBase]: 11426/53229 cut-off events. [2023-08-25 18:15:58,946 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:16:00,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64593 conditions, 53229 events. 11426/53229 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 685306 event pairs, 7181 based on Foata normal form. 0/46855 useless extension candidates. Maximal degree in co-relation 31704. Up to 11264 conditions per place. [2023-08-25 18:16:03,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 287496 [2023-08-25 18:16:06,974 INFO L134 LiptonReduction]: Checked pairs total: 1086384 [2023-08-25 18:16:06,974 INFO L136 LiptonReduction]: Total number of compositions: 290 [2023-08-25 18:16:06,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:16:06,975 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:16:06,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:16:07,123 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:16:07,124 INFO L124 PetriNetUnfolderBase]: 324/1293 cut-off events. [2023-08-25 18:16:07,124 INFO L125 PetriNetUnfolderBase]: For 653/653 co-relation queries the response was YES. [2023-08-25 18:16:07,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:16:07,124 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:16:07,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:16:07,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:16:07,125 INFO L85 PathProgramCache]: Analyzing trace with hash 19750658, now seen corresponding path program 1 times [2023-08-25 18:16:07,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:16:07,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138534447] [2023-08-25 18:16:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:16:07,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:16:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:07,168 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:16:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:07,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:16:07,199 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:16:07,199 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:16:07,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-25 18:16:07,199 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:16:07,201 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:16:07,201 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:16:07,201 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-25 18:16:07,239 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-25 18:16:07,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 573 places, 640 transitions, 1508 flow [2023-08-25 18:16:42,430 INFO L124 PetriNetUnfolderBase]: 24752/107587 cut-off events. [2023-08-25 18:16:42,430 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:16:47,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132278 conditions, 107587 events. 24752/107587 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1645. Compared 1516558 event pairs, 16398 based on Foata normal form. 0/95049 useless extension candidates. Maximal degree in co-relation 64572. Up to 24576 conditions per place. [2023-08-25 18:16:47,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 573 places, 640 transitions, 1508 flow [2023-08-25 18:16:49,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 573 places, 640 transitions, 1508 flow [2023-08-25 18:16:49,055 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:49,055 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 573 places, 640 transitions, 1508 flow [2023-08-25 18:16:49,056 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 573 places, 640 transitions, 1508 flow [2023-08-25 18:16:49,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 573 places, 640 transitions, 1508 flow [2023-08-25 18:17:22,151 INFO L124 PetriNetUnfolderBase]: 24752/107587 cut-off events. [2023-08-25 18:17:22,151 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:17:27,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132278 conditions, 107587 events. 24752/107587 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1645. Compared 1516558 event pairs, 16398 based on Foata normal form. 0/95049 useless extension candidates. Maximal degree in co-relation 64572. Up to 24576 conditions per place. [2023-08-25 18:17:42,552 INFO L119 LiptonReduction]: Number of co-enabled transitions 338448 [2023-08-25 18:17:46,039 INFO L134 LiptonReduction]: Checked pairs total: 1485202 [2023-08-25 18:17:46,039 INFO L136 LiptonReduction]: Total number of compositions: 310 [2023-08-25 18:17:46,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:17:46,041 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1f07809d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:17:46,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:17:46,265 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:17:46,265 INFO L124 PetriNetUnfolderBase]: 505/1820 cut-off events. [2023-08-25 18:17:46,266 INFO L125 PetriNetUnfolderBase]: For 995/995 co-relation queries the response was YES. [2023-08-25 18:17:46,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:17:46,266 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:17:46,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:17:46,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:17:46,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1104369202, now seen corresponding path program 1 times [2023-08-25 18:17:46,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:17:46,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865835431] [2023-08-25 18:17:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:17:46,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:17:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:17:46,304 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:17:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:17:46,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:17:46,323 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:17:46,323 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:17:46,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-25 18:17:46,323 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:17:46,324 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:17:46,324 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:17:46,324 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-25 18:17:46,361 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-25 18:17:46,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 614 places, 686 transitions, 1632 flow [2023-08-25 18:19:13,577 INFO L124 PetriNetUnfolderBase]: 53438/218265 cut-off events. [2023-08-25 18:19:13,577 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-25 18:19:29,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271644 conditions, 218265 events. 53438/218265 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 3161. Compared 3352710 event pairs, 36879 based on Foata normal form. 0/193419 useless extension candidates. Maximal degree in co-relation 132257. Up to 53248 conditions per place. [2023-08-25 18:19:29,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 614 places, 686 transitions, 1632 flow [2023-08-25 18:19:36,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 614 places, 686 transitions, 1632 flow [2023-08-25 18:19:36,622 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:19:36,622 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 614 places, 686 transitions, 1632 flow [2023-08-25 18:19:36,622 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 614 places, 686 transitions, 1632 flow [2023-08-25 18:19:36,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 614 places, 686 transitions, 1632 flow