/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_28-funptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 18:09:24,681 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 18:09:24,749 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 18:09:24,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 18:09:24,757 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 18:09:24,784 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 18:09:24,785 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 18:09:24,785 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 18:09:24,785 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 18:09:24,788 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 18:09:24,789 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 18:09:24,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 18:09:24,789 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 18:09:24,790 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 18:09:24,790 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 18:09:24,790 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 18:09:24,791 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 18:09:24,791 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 18:09:24,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 18:09:24,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 18:09:24,791 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 18:09:24,792 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 18:09:24,792 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 18:09:24,793 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 18:09:24,793 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 18:09:24,793 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 18:09:24,793 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 18:09:24,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:09:24,793 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 18:09:24,794 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 18:09:24,794 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 18:09:24,794 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 18:09:24,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 18:09:24,795 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 18:09:24,795 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 18:09:24,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 18:09:25,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 18:09:25,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 18:09:25,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 18:09:25,073 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 18:09:25,074 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 18:09:25,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i [2023-08-25 18:09:26,180 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 18:09:26,512 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 18:09:26,512 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i [2023-08-25 18:09:26,529 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeb0e6798/f6f3748d0eea4b78b7928dc25e8ffab4/FLAG35e68e22b [2023-08-25 18:09:26,796 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeb0e6798/f6f3748d0eea4b78b7928dc25e8ffab4 [2023-08-25 18:09:26,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 18:09:26,801 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 18:09:26,803 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 18:09:26,803 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 18:09:26,805 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 18:09:26,806 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:09:26" (1/1) ... [2023-08-25 18:09:26,806 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f6e9b71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:26, skipping insertion in model container [2023-08-25 18:09:26,806 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:09:26" (1/1) ... [2023-08-25 18:09:26,851 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 18:09:27,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:09:27,233 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 18:09:27,254 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:09:27,256 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:09:27,260 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-25 18:09:27,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:09:27,343 WARN L669 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-08-25 18:09:27,348 INFO L206 MainTranslator]: Completed translation [2023-08-25 18:09:27,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27 WrapperNode [2023-08-25 18:09:27,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 18:09:27,350 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 18:09:27,350 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 18:09:27,350 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 18:09:27,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (1/1) ... [2023-08-25 18:09:27,380 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (1/1) ... [2023-08-25 18:09:27,407 INFO L138 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2023-08-25 18:09:27,408 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 18:09:27,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 18:09:27,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 18:09:27,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 18:09:27,415 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (1/1) ... [2023-08-25 18:09:27,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (1/1) ... [2023-08-25 18:09:27,430 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (1/1) ... [2023-08-25 18:09:27,431 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (1/1) ... [2023-08-25 18:09:27,435 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (1/1) ... [2023-08-25 18:09:27,447 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (1/1) ... [2023-08-25 18:09:27,449 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (1/1) ... [2023-08-25 18:09:27,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (1/1) ... [2023-08-25 18:09:27,458 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 18:09:27,459 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 18:09:27,459 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 18:09:27,459 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 18:09:27,460 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (1/1) ... [2023-08-25 18:09:27,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:09:27,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:09:27,496 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 18:09:27,503 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 18:09:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 18:09:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 18:09:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-25 18:09:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 18:09:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-25 18:09:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 18:09:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-25 18:09:27,525 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-25 18:09:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 18:09:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 18:09:27,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 18:09:27,527 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 18:09:27,660 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 18:09:27,661 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 18:09:27,820 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 18:09:27,825 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 18:09:27,826 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-25 18:09:27,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:09:27 BoogieIcfgContainer [2023-08-25 18:09:27,827 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 18:09:27,829 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 18:09:27,829 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 18:09:27,831 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 18:09:27,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:09:26" (1/3) ... [2023-08-25 18:09:27,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b530d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:09:27, skipping insertion in model container [2023-08-25 18:09:27,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:09:27" (2/3) ... [2023-08-25 18:09:27,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b530d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:09:27, skipping insertion in model container [2023-08-25 18:09:27,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:09:27" (3/3) ... [2023-08-25 18:09:27,833 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2023-08-25 18:09:27,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 18:09:27,868 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-25 18:09:27,868 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 18:09:27,915 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-25 18:09:27,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 158 transitions, 324 flow [2023-08-25 18:09:27,995 INFO L124 PetriNetUnfolderBase]: 19/215 cut-off events. [2023-08-25 18:09:27,995 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-25 18:09:28,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 215 events. 19/215 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 621 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 117. Up to 4 conditions per place. [2023-08-25 18:09:28,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 158 transitions, 324 flow [2023-08-25 18:09:28,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 153 transitions, 311 flow [2023-08-25 18:09:28,006 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:28,013 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 153 transitions, 311 flow [2023-08-25 18:09:28,015 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 153 transitions, 311 flow [2023-08-25 18:09:28,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 153 transitions, 311 flow [2023-08-25 18:09:28,043 INFO L124 PetriNetUnfolderBase]: 18/210 cut-off events. [2023-08-25 18:09:28,043 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:09:28,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 210 events. 18/210 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 615 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 117. Up to 4 conditions per place. [2023-08-25 18:09:28,047 INFO L119 LiptonReduction]: Number of co-enabled transitions 6930 [2023-08-25 18:09:30,735 INFO L134 LiptonReduction]: Checked pairs total: 20471 [2023-08-25 18:09:30,736 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-25 18:09:30,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:30,750 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:30,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:30,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:30,753 INFO L124 PetriNetUnfolderBase]: 0/16 cut-off events. [2023-08-25 18:09:30,753 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:09:30,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:30,753 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-25 18:09:30,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:30,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash -256864750, now seen corresponding path program 1 times [2023-08-25 18:09:30,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:30,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539890157] [2023-08-25 18:09:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:30,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:30,848 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:30,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:30,898 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:30,898 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:30,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 18:09:30,900 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:30,904 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:30,905 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:30,905 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 18:09:30,943 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-25 18:09:30,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 215 transitions, 448 flow [2023-08-25 18:09:31,013 INFO L124 PetriNetUnfolderBase]: 34/360 cut-off events. [2023-08-25 18:09:31,014 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:09:31,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 360 events. 34/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1337 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2023-08-25 18:09:31,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 215 transitions, 448 flow [2023-08-25 18:09:31,021 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 215 transitions, 448 flow [2023-08-25 18:09:31,021 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:31,021 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 215 transitions, 448 flow [2023-08-25 18:09:31,022 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 215 transitions, 448 flow [2023-08-25 18:09:31,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 215 transitions, 448 flow [2023-08-25 18:09:31,056 INFO L124 PetriNetUnfolderBase]: 34/360 cut-off events. [2023-08-25 18:09:31,057 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:09:31,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 360 events. 34/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1337 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2023-08-25 18:09:31,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 21120 [2023-08-25 18:09:33,878 INFO L134 LiptonReduction]: Checked pairs total: 78396 [2023-08-25 18:09:33,878 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-25 18:09:33,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:33,880 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:33,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:33,885 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:33,885 INFO L124 PetriNetUnfolderBase]: 1/50 cut-off events. [2023-08-25 18:09:33,885 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 18:09:33,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:33,885 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-25 18:09:33,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:33,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:33,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1059327987, now seen corresponding path program 1 times [2023-08-25 18:09:33,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:33,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479788321] [2023-08-25 18:09:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:33,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:33,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:33,928 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:33,929 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:33,929 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:33,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-25 18:09:33,929 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:33,930 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:33,930 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:33,930 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 18:09:33,948 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-25 18:09:33,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 272 transitions, 574 flow [2023-08-25 18:09:34,001 INFO L124 PetriNetUnfolderBase]: 54/550 cut-off events. [2023-08-25 18:09:34,001 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:09:34,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 550 events. 54/550 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2353 event pairs, 1 based on Foata normal form. 0/457 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-25 18:09:34,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 272 transitions, 574 flow [2023-08-25 18:09:34,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 272 transitions, 574 flow [2023-08-25 18:09:34,042 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:34,043 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 252 places, 272 transitions, 574 flow [2023-08-25 18:09:34,043 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 252 places, 272 transitions, 574 flow [2023-08-25 18:09:34,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 272 transitions, 574 flow [2023-08-25 18:09:34,095 INFO L124 PetriNetUnfolderBase]: 54/550 cut-off events. [2023-08-25 18:09:34,095 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:09:34,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 550 events. 54/550 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2353 event pairs, 1 based on Foata normal form. 0/457 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-25 18:09:34,120 INFO L119 LiptonReduction]: Number of co-enabled transitions 41250 [2023-08-25 18:09:37,086 INFO L134 LiptonReduction]: Checked pairs total: 166182 [2023-08-25 18:09:37,086 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-25 18:09:37,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:37,088 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:37,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:37,096 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:37,096 INFO L124 PetriNetUnfolderBase]: 10/106 cut-off events. [2023-08-25 18:09:37,096 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-25 18:09:37,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:37,096 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-25 18:09:37,097 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:37,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:37,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1334760867, now seen corresponding path program 1 times [2023-08-25 18:09:37,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:37,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291360394] [2023-08-25 18:09:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:37,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:37,117 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:37,134 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:37,135 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:37,135 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:37,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-25 18:09:37,135 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:37,135 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:37,136 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:37,136 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-25 18:09:37,176 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-25 18:09:37,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 329 transitions, 702 flow [2023-08-25 18:09:37,280 INFO L124 PetriNetUnfolderBase]: 86/832 cut-off events. [2023-08-25 18:09:37,281 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:09:37,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 832 events. 86/832 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3900 event pairs, 6 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 570. Up to 32 conditions per place. [2023-08-25 18:09:37,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 304 places, 329 transitions, 702 flow [2023-08-25 18:09:37,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 329 transitions, 702 flow [2023-08-25 18:09:37,305 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:37,305 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 329 transitions, 702 flow [2023-08-25 18:09:37,305 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 329 transitions, 702 flow [2023-08-25 18:09:37,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 329 transitions, 702 flow [2023-08-25 18:09:37,402 INFO L124 PetriNetUnfolderBase]: 86/832 cut-off events. [2023-08-25 18:09:37,403 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:09:37,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 832 events. 86/832 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3900 event pairs, 6 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 570. Up to 32 conditions per place. [2023-08-25 18:09:37,442 INFO L119 LiptonReduction]: Number of co-enabled transitions 67760 [2023-08-25 18:09:40,102 INFO L134 LiptonReduction]: Checked pairs total: 283751 [2023-08-25 18:09:40,103 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-25 18:09:40,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:40,105 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:40,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:40,118 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:40,118 INFO L124 PetriNetUnfolderBase]: 20/171 cut-off events. [2023-08-25 18:09:40,118 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:09:40,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:40,119 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-25 18:09:40,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:40,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:40,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1751267874, now seen corresponding path program 1 times [2023-08-25 18:09:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:40,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613397887] [2023-08-25 18:09:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:40,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:40,154 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:40,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:40,197 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:40,197 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:40,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 18:09:40,197 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:40,197 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:40,197 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:40,198 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-25 18:09:40,223 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-25 18:09:40,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 356 places, 386 transitions, 832 flow [2023-08-25 18:09:40,403 INFO L124 PetriNetUnfolderBase]: 146/1302 cut-off events. [2023-08-25 18:09:40,403 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:09:40,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 1302 events. 146/1302 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 6880 event pairs, 23 based on Foata normal form. 0/1097 useless extension candidates. Maximal degree in co-relation 877. Up to 80 conditions per place. [2023-08-25 18:09:40,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 356 places, 386 transitions, 832 flow [2023-08-25 18:09:40,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 356 places, 386 transitions, 832 flow [2023-08-25 18:09:40,440 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:40,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 356 places, 386 transitions, 832 flow [2023-08-25 18:09:40,440 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 356 places, 386 transitions, 832 flow [2023-08-25 18:09:40,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 356 places, 386 transitions, 832 flow [2023-08-25 18:09:40,599 INFO L124 PetriNetUnfolderBase]: 146/1302 cut-off events. [2023-08-25 18:09:40,600 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:09:40,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 1302 events. 146/1302 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 6880 event pairs, 23 based on Foata normal form. 0/1097 useless extension candidates. Maximal degree in co-relation 877. Up to 80 conditions per place. [2023-08-25 18:09:40,699 INFO L119 LiptonReduction]: Number of co-enabled transitions 100650 [2023-08-25 18:09:44,046 INFO L134 LiptonReduction]: Checked pairs total: 430330 [2023-08-25 18:09:44,046 INFO L136 LiptonReduction]: Total number of compositions: 213 [2023-08-25 18:09:44,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:44,048 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:44,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:44,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:44,066 INFO L124 PetriNetUnfolderBase]: 31/236 cut-off events. [2023-08-25 18:09:44,067 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-25 18:09:44,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:44,067 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:09:44,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:44,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:44,067 INFO L85 PathProgramCache]: Analyzing trace with hash -225393760, now seen corresponding path program 1 times [2023-08-25 18:09:44,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:44,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598225984] [2023-08-25 18:09:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:44,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:44,083 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:44,098 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:44,098 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:44,098 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:44,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 18:09:44,098 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:44,099 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:44,099 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:44,099 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-25 18:09:44,123 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-25 18:09:44,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 408 places, 443 transitions, 964 flow [2023-08-25 18:09:44,608 INFO L124 PetriNetUnfolderBase]: 270/2156 cut-off events. [2023-08-25 18:09:44,608 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:09:44,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2388 conditions, 2156 events. 270/2156 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 13611 event pairs, 72 based on Foata normal form. 0/1835 useless extension candidates. Maximal degree in co-relation 1401. Up to 192 conditions per place. [2023-08-25 18:09:44,641 INFO L82 GeneralOperation]: Start removeDead. Operand has 408 places, 443 transitions, 964 flow [2023-08-25 18:09:44,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 408 places, 443 transitions, 964 flow [2023-08-25 18:09:44,652 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:44,652 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 408 places, 443 transitions, 964 flow [2023-08-25 18:09:44,652 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 408 places, 443 transitions, 964 flow [2023-08-25 18:09:44,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 408 places, 443 transitions, 964 flow [2023-08-25 18:09:45,003 INFO L124 PetriNetUnfolderBase]: 270/2156 cut-off events. [2023-08-25 18:09:45,004 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:09:45,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2388 conditions, 2156 events. 270/2156 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 13611 event pairs, 72 based on Foata normal form. 0/1835 useless extension candidates. Maximal degree in co-relation 1401. Up to 192 conditions per place. [2023-08-25 18:09:45,190 INFO L119 LiptonReduction]: Number of co-enabled transitions 139920 [2023-08-25 18:09:48,038 INFO L134 LiptonReduction]: Checked pairs total: 609056 [2023-08-25 18:09:48,038 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-08-25 18:09:48,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:48,040 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:48,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:48,080 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:48,080 INFO L124 PetriNetUnfolderBase]: 40/298 cut-off events. [2023-08-25 18:09:48,080 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-25 18:09:48,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:48,080 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:09:48,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:48,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:48,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2024120933, now seen corresponding path program 1 times [2023-08-25 18:09:48,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:48,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988831600] [2023-08-25 18:09:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:48,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:48,099 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:48,114 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:48,114 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:48,114 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:48,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-25 18:09:48,115 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:48,115 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:48,115 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:48,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-25 18:09:48,137 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-25 18:09:48,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 460 places, 500 transitions, 1098 flow [2023-08-25 18:09:49,190 INFO L124 PetriNetUnfolderBase]: 538/3794 cut-off events. [2023-08-25 18:09:49,190 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:09:49,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4292 conditions, 3794 events. 538/3794 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 28283 event pairs, 201 based on Foata normal form. 0/3261 useless extension candidates. Maximal degree in co-relation 2374. Up to 448 conditions per place. [2023-08-25 18:09:49,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 460 places, 500 transitions, 1098 flow [2023-08-25 18:09:49,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 460 places, 500 transitions, 1098 flow [2023-08-25 18:09:49,295 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:49,295 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 460 places, 500 transitions, 1098 flow [2023-08-25 18:09:49,296 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 460 places, 500 transitions, 1098 flow [2023-08-25 18:09:49,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 460 places, 500 transitions, 1098 flow [2023-08-25 18:09:50,244 INFO L124 PetriNetUnfolderBase]: 538/3794 cut-off events. [2023-08-25 18:09:50,244 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:09:50,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4292 conditions, 3794 events. 538/3794 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 28283 event pairs, 201 based on Foata normal form. 0/3261 useless extension candidates. Maximal degree in co-relation 2374. Up to 448 conditions per place. [2023-08-25 18:09:50,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 185570 [2023-08-25 18:09:53,689 INFO L134 LiptonReduction]: Checked pairs total: 819078 [2023-08-25 18:09:53,690 INFO L136 LiptonReduction]: Total number of compositions: 262 [2023-08-25 18:09:53,691 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:53,691 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:53,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:53,735 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:53,735 INFO L124 PetriNetUnfolderBase]: 45/358 cut-off events. [2023-08-25 18:09:53,735 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-08-25 18:09:53,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:53,735 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:09:53,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:53,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:53,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1502062931, now seen corresponding path program 1 times [2023-08-25 18:09:53,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:53,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476204004] [2023-08-25 18:09:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:53,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:53,778 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:53,813 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:53,813 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:53,813 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:53,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-25 18:09:53,813 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:53,814 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:53,814 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:53,814 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-25 18:09:53,842 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-25 18:09:53,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 512 places, 557 transitions, 1234 flow [2023-08-25 18:09:55,643 INFO L124 PetriNetUnfolderBase]: 1126/7032 cut-off events. [2023-08-25 18:09:55,644 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:09:55,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8117 conditions, 7032 events. 1126/7032 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 61776 event pairs, 522 based on Foata normal form. 0/6095 useless extension candidates. Maximal degree in co-relation 4276. Up to 1024 conditions per place. [2023-08-25 18:09:55,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 512 places, 557 transitions, 1234 flow [2023-08-25 18:09:55,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 512 places, 557 transitions, 1234 flow [2023-08-25 18:09:55,966 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:55,966 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 512 places, 557 transitions, 1234 flow [2023-08-25 18:09:55,966 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 512 places, 557 transitions, 1234 flow [2023-08-25 18:09:55,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 512 places, 557 transitions, 1234 flow [2023-08-25 18:09:57,694 INFO L124 PetriNetUnfolderBase]: 1126/7032 cut-off events. [2023-08-25 18:09:57,694 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:09:57,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8117 conditions, 7032 events. 1126/7032 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 61776 event pairs, 522 based on Foata normal form. 0/6095 useless extension candidates. Maximal degree in co-relation 4276. Up to 1024 conditions per place. [2023-08-25 18:09:58,354 INFO L119 LiptonReduction]: Number of co-enabled transitions 237600 [2023-08-25 18:10:01,792 INFO L134 LiptonReduction]: Checked pairs total: 1060990 [2023-08-25 18:10:01,792 INFO L136 LiptonReduction]: Total number of compositions: 292 [2023-08-25 18:10:01,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:10:01,794 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:10:01,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:10:01,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:10:01,830 INFO L124 PetriNetUnfolderBase]: 66/454 cut-off events. [2023-08-25 18:10:01,831 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-25 18:10:01,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:10:01,831 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:10:01,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:10:01,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:10:01,831 INFO L85 PathProgramCache]: Analyzing trace with hash 758089113, now seen corresponding path program 1 times [2023-08-25 18:10:01,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:10:01,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933676466] [2023-08-25 18:10:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:10:01,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:10:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:01,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:10:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:01,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:10:01,858 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:10:01,858 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:10:01,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 18:10:01,859 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:10:01,859 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:10:01,859 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:10:01,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-25 18:10:01,889 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-25 18:10:01,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 564 places, 614 transitions, 1372 flow [2023-08-25 18:10:05,904 INFO L124 PetriNetUnfolderBase]: 2418/13534 cut-off events. [2023-08-25 18:10:05,905 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:10:06,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15911 conditions, 13534 events. 2418/13534 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 138967 event pairs, 1291 based on Foata normal form. 0/11809 useless extension candidates. Maximal degree in co-relation 8099. Up to 2304 conditions per place. [2023-08-25 18:10:06,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 564 places, 614 transitions, 1372 flow [2023-08-25 18:10:06,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 564 places, 614 transitions, 1372 flow [2023-08-25 18:10:06,405 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:10:06,405 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 564 places, 614 transitions, 1372 flow [2023-08-25 18:10:06,405 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 564 places, 614 transitions, 1372 flow [2023-08-25 18:10:06,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 564 places, 614 transitions, 1372 flow [2023-08-25 18:10:10,279 INFO L124 PetriNetUnfolderBase]: 2418/13534 cut-off events. [2023-08-25 18:10:10,279 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:10:10,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15911 conditions, 13534 events. 2418/13534 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 138967 event pairs, 1291 based on Foata normal form. 0/11809 useless extension candidates. Maximal degree in co-relation 8099. Up to 2304 conditions per place. [2023-08-25 18:10:11,649 INFO L119 LiptonReduction]: Number of co-enabled transitions 296010 [2023-08-25 18:10:15,090 INFO L134 LiptonReduction]: Checked pairs total: 1338816 [2023-08-25 18:10:15,090 INFO L136 LiptonReduction]: Total number of compositions: 318 [2023-08-25 18:10:15,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:10:15,092 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:10:15,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:10:15,153 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:10:15,153 INFO L124 PetriNetUnfolderBase]: 83/546 cut-off events. [2023-08-25 18:10:15,153 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2023-08-25 18:10:15,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:10:15,153 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:10:15,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:10:15,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:10:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1940483531, now seen corresponding path program 1 times [2023-08-25 18:10:15,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:10:15,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272930445] [2023-08-25 18:10:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:10:15,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:10:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:15,176 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:10:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:15,207 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:10:15,207 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:10:15,207 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:10:15,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-25 18:10:15,208 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:10:15,208 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:10:15,208 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:10:15,208 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-25 18:10:15,249 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-25 18:10:15,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 616 places, 671 transitions, 1512 flow [2023-08-25 18:10:24,183 INFO L124 PetriNetUnfolderBase]: 5246/26692 cut-off events. [2023-08-25 18:10:24,183 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:10:25,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31898 conditions, 26692 events. 5246/26692 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 305721 event pairs, 3084 based on Foata normal form. 0/23411 useless extension candidates. Maximal degree in co-relation 15891. Up to 5120 conditions per place. [2023-08-25 18:10:25,279 INFO L82 GeneralOperation]: Start removeDead. Operand has 616 places, 671 transitions, 1512 flow [2023-08-25 18:10:25,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 616 places, 671 transitions, 1512 flow [2023-08-25 18:10:25,577 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:10:25,577 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 616 places, 671 transitions, 1512 flow [2023-08-25 18:10:25,577 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 616 places, 671 transitions, 1512 flow [2023-08-25 18:10:25,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 616 places, 671 transitions, 1512 flow [2023-08-25 18:10:33,974 INFO L124 PetriNetUnfolderBase]: 5246/26692 cut-off events. [2023-08-25 18:10:33,974 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:10:35,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31898 conditions, 26692 events. 5246/26692 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 305721 event pairs, 3084 based on Foata normal form. 0/23411 useless extension candidates. Maximal degree in co-relation 15891. Up to 5120 conditions per place. [2023-08-25 18:10:37,977 INFO L119 LiptonReduction]: Number of co-enabled transitions 360800 [2023-08-25 18:10:41,893 INFO L134 LiptonReduction]: Checked pairs total: 1631248 [2023-08-25 18:10:41,893 INFO L136 LiptonReduction]: Total number of compositions: 342 [2023-08-25 18:10:41,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:10:41,895 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:10:41,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:10:41,989 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:10:41,989 INFO L124 PetriNetUnfolderBase]: 104/653 cut-off events. [2023-08-25 18:10:41,989 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2023-08-25 18:10:41,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:10:41,990 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:10:41,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:10:41,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:10:41,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1857475994, now seen corresponding path program 1 times [2023-08-25 18:10:41,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:10:41,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278333660] [2023-08-25 18:10:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:10:41,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:10:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:42,006 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:10:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:42,020 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:10:42,021 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:10:42,021 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:10:42,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-25 18:10:42,021 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:10:42,021 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:10:42,021 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:10:42,021 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-25 18:10:42,054 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-25 18:10:42,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 668 places, 728 transitions, 1654 flow [2023-08-25 18:11:00,934 INFO L124 PetriNetUnfolderBase]: 11402/53418 cut-off events. [2023-08-25 18:11:00,934 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:11:04,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64782 conditions, 53418 events. 11402/53418 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 683124 event pairs, 7181 based on Foata normal form. 0/47045 useless extension candidates. Maximal degree in co-relation 31876. Up to 11264 conditions per place. [2023-08-25 18:11:04,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 668 places, 728 transitions, 1654 flow [2023-08-25 18:11:05,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 668 places, 728 transitions, 1654 flow [2023-08-25 18:11:05,327 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:11:05,327 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 668 places, 728 transitions, 1654 flow [2023-08-25 18:11:05,328 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 668 places, 728 transitions, 1654 flow [2023-08-25 18:11:05,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 668 places, 728 transitions, 1654 flow [2023-08-25 18:11:23,198 INFO L124 PetriNetUnfolderBase]: 11402/53418 cut-off events. [2023-08-25 18:11:23,198 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:11:25,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64782 conditions, 53418 events. 11402/53418 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 683124 event pairs, 7181 based on Foata normal form. 0/47045 useless extension candidates. Maximal degree in co-relation 31876. Up to 11264 conditions per place. [2023-08-25 18:11:29,999 INFO L119 LiptonReduction]: Number of co-enabled transitions 431970 [2023-08-25 18:11:34,754 INFO L134 LiptonReduction]: Checked pairs total: 1959633 [2023-08-25 18:11:34,754 INFO L136 LiptonReduction]: Total number of compositions: 367 [2023-08-25 18:11:34,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:11:34,756 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:11:34,756 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:11:34,849 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:11:34,849 INFO L124 PetriNetUnfolderBase]: 134/788 cut-off events. [2023-08-25 18:11:34,849 INFO L125 PetriNetUnfolderBase]: For 380/380 co-relation queries the response was YES. [2023-08-25 18:11:34,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:11:34,849 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:11:34,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:11:34,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:11:34,851 INFO L85 PathProgramCache]: Analyzing trace with hash -501573731, now seen corresponding path program 1 times [2023-08-25 18:11:34,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:11:34,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043356436] [2023-08-25 18:11:34,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:11:34,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:11:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:34,890 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:11:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:34,950 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:11:34,950 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:11:34,950 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:11:34,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-25 18:11:34,950 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:11:34,951 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:11:34,951 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:11:34,951 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-25 18:11:34,984 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-25 18:11:34,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 720 places, 785 transitions, 1798 flow [2023-08-25 18:12:13,237 INFO L124 PetriNetUnfolderBase]: 24726/107792 cut-off events. [2023-08-25 18:12:13,237 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:12:23,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132483 conditions, 107792 events. 24726/107792 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1702. Compared 1519375 event pairs, 16398 based on Foata normal form. 0/95255 useless extension candidates. Maximal degree in co-relation 64758. Up to 24576 conditions per place. [2023-08-25 18:12:23,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 720 places, 785 transitions, 1798 flow [2023-08-25 18:12:25,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 720 places, 785 transitions, 1798 flow [2023-08-25 18:12:25,428 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:12:25,429 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 720 places, 785 transitions, 1798 flow [2023-08-25 18:12:25,429 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 720 places, 785 transitions, 1798 flow [2023-08-25 18:12:25,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 720 places, 785 transitions, 1798 flow [2023-08-25 18:13:03,982 INFO L124 PetriNetUnfolderBase]: 24726/107792 cut-off events. [2023-08-25 18:13:03,983 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:13:12,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132483 conditions, 107792 events. 24726/107792 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1702. Compared 1519375 event pairs, 16398 based on Foata normal form. 0/95255 useless extension candidates. Maximal degree in co-relation 64758. Up to 24576 conditions per place. [2023-08-25 18:13:23,849 INFO L119 LiptonReduction]: Number of co-enabled transitions 509520 [2023-08-25 18:13:28,087 INFO L134 LiptonReduction]: Checked pairs total: 2362173 [2023-08-25 18:13:28,087 INFO L136 LiptonReduction]: Total number of compositions: 395 [2023-08-25 18:13:28,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:13:28,089 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;@6e4eb78c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:13:28,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:13:28,207 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:13:28,207 INFO L124 PetriNetUnfolderBase]: 174/950 cut-off events. [2023-08-25 18:13:28,208 INFO L125 PetriNetUnfolderBase]: For 514/514 co-relation queries the response was YES. [2023-08-25 18:13:28,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:13:28,208 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 18:13:28,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:13:28,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:13:28,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1506538824, now seen corresponding path program 1 times [2023-08-25 18:13:28,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:13:28,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244011814] [2023-08-25 18:13:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:13:28,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:13:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:13:28,232 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:13:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:13:28,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:13:28,250 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:13:28,250 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:13:28,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-25 18:13:28,251 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:13:28,251 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:13:28,251 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:13:28,251 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-25 18:13:28,285 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-25 18:13:28,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 772 places, 842 transitions, 1944 flow