/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_07-cond_racing2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 18:00:05,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 18:00:05,097 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 18:00:05,100 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 18:00:05,100 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 18:00:05,114 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 18:00:05,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 18:00:05,115 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 18:00:05,115 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 18:00:05,116 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 18:00:05,116 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 18:00:05,116 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 18:00:05,116 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 18:00:05,116 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 18:00:05,117 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 18:00:05,117 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 18:00:05,117 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 18:00:05,117 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 18:00:05,118 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 18:00:05,118 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 18:00:05,118 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 18:00:05,121 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 18:00:05,121 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 18:00:05,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 18:00:05,122 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 18:00:05,122 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 18:00:05,122 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 18:00:05,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:00:05,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 18:00:05,123 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 18:00:05,123 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 18:00:05,123 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 18:00:05,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 18:00:05,124 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 18:00:05,124 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 18:00:05,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 18:00:05,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 18:00:05,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 18:00:05,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 18:00:05,349 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 18:00:05,349 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 18:00:05,350 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-08-25 18:00:06,211 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 18:00:06,418 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 18:00:06,418 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-08-25 18:00:06,431 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23235d56a/419bab09bf844d1d97bb7ce202d5cdb3/FLAG6583cd361 [2023-08-25 18:00:06,442 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23235d56a/419bab09bf844d1d97bb7ce202d5cdb3 [2023-08-25 18:00:06,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 18:00:06,448 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 18:00:06,450 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 18:00:06,450 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 18:00:06,452 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 18:00:06,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:06,453 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6163079c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06, skipping insertion in model container [2023-08-25 18:00:06,453 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:06,485 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 18:00:06,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:00:06,843 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 18:00:06,856 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [119] [2023-08-25 18:00:06,872 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [481] [2023-08-25 18:00:06,873 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [481] [2023-08-25 18:00:06,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:00:06,945 INFO L206 MainTranslator]: Completed translation [2023-08-25 18:00:06,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06 WrapperNode [2023-08-25 18:00:06,947 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 18:00:06,948 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 18:00:06,948 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 18:00:06,948 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 18:00:06,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:06,979 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:07,005 INFO L138 Inliner]: procedures = 270, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 102 [2023-08-25 18:00:07,006 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 18:00:07,007 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 18:00:07,007 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 18:00:07,007 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 18:00:07,013 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:07,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:07,022 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:07,022 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:07,027 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:07,030 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:07,031 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:07,032 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:07,034 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 18:00:07,034 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 18:00:07,034 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 18:00:07,035 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 18:00:07,035 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (1/1) ... [2023-08-25 18:00:07,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:00:07,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:00:07,059 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 18:00:07,065 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 18:00:07,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 18:00:07,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 18:00:07,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-25 18:00:07,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 18:00:07,086 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-25 18:00:07,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 18:00:07,086 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-25 18:00:07,086 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-25 18:00:07,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 18:00:07,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 18:00:07,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 18:00:07,087 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 18:00:07,223 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 18:00:07,225 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 18:00:07,479 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 18:00:07,484 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 18:00:07,485 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-25 18:00:07,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:00:07 BoogieIcfgContainer [2023-08-25 18:00:07,488 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 18:00:07,490 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 18:00:07,490 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 18:00:07,492 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 18:00:07,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:00:06" (1/3) ... [2023-08-25 18:00:07,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ceb7d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:00:07, skipping insertion in model container [2023-08-25 18:00:07,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:00:06" (2/3) ... [2023-08-25 18:00:07,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ceb7d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:00:07, skipping insertion in model container [2023-08-25 18:00:07,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:00:07" (3/3) ... [2023-08-25 18:00:07,495 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2023-08-25 18:00:07,506 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 18:00:07,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-25 18:00:07,506 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 18:00:07,559 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-25 18:00:07,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 152 transitions, 312 flow [2023-08-25 18:00:07,665 INFO L124 PetriNetUnfolderBase]: 25/209 cut-off events. [2023-08-25 18:00:07,666 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-25 18:00:07,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 209 events. 25/209 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 593 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 106. Up to 6 conditions per place. [2023-08-25 18:00:07,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 152 transitions, 312 flow [2023-08-25 18:00:07,678 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 147 transitions, 299 flow [2023-08-25 18:00:07,680 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:00:07,688 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 147 transitions, 299 flow [2023-08-25 18:00:07,691 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 147 transitions, 299 flow [2023-08-25 18:00:07,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 147 transitions, 299 flow [2023-08-25 18:00:07,726 INFO L124 PetriNetUnfolderBase]: 24/204 cut-off events. [2023-08-25 18:00:07,727 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:00:07,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 204 events. 24/204 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 590 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 106. Up to 6 conditions per place. [2023-08-25 18:00:07,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 5544 [2023-08-25 18:00:10,502 INFO L134 LiptonReduction]: Checked pairs total: 12980 [2023-08-25 18:00:10,502 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-25 18:00:10,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:00:10,515 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:00:10,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:00:10,519 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:00:10,519 INFO L124 PetriNetUnfolderBase]: 5/30 cut-off events. [2023-08-25 18:00:10,519 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:00:10,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:00:10,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-25 18:00:10,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:00:10,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:00:10,523 INFO L85 PathProgramCache]: Analyzing trace with hash -204616309, now seen corresponding path program 1 times [2023-08-25 18:00:10,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:00:10,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052375504] [2023-08-25 18:00:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:00:10,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:00:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:10,612 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:00:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:10,638 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:00:10,639 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:00:10,640 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:00:10,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 18:00:10,641 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:00:10,643 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:00:10,643 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:00:10,643 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 18:00:10,656 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-25 18:00:10,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 198 transitions, 414 flow [2023-08-25 18:00:10,694 INFO L124 PetriNetUnfolderBase]: 43/343 cut-off events. [2023-08-25 18:00:10,694 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:00:10,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 343 events. 43/343 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1204 event pairs, 0 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 211. Up to 9 conditions per place. [2023-08-25 18:00:10,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 198 transitions, 414 flow [2023-08-25 18:00:10,699 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 198 transitions, 414 flow [2023-08-25 18:00:10,699 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:00:10,699 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 198 transitions, 414 flow [2023-08-25 18:00:10,700 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 198 transitions, 414 flow [2023-08-25 18:00:10,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 198 transitions, 414 flow [2023-08-25 18:00:10,729 INFO L124 PetriNetUnfolderBase]: 43/343 cut-off events. [2023-08-25 18:00:10,729 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:00:10,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 343 events. 43/343 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1204 event pairs, 0 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 211. Up to 9 conditions per place. [2023-08-25 18:00:10,738 INFO L119 LiptonReduction]: Number of co-enabled transitions 15928 [2023-08-25 18:00:13,377 INFO L134 LiptonReduction]: Checked pairs total: 50640 [2023-08-25 18:00:13,377 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-08-25 18:00:13,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:00:13,379 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:00:13,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:00:13,383 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:00:13,384 INFO L124 PetriNetUnfolderBase]: 13/79 cut-off events. [2023-08-25 18:00:13,384 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-25 18:00:13,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:00:13,384 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-25 18:00:13,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:00:13,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:00:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash 197467143, now seen corresponding path program 1 times [2023-08-25 18:00:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:00:13,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739799922] [2023-08-25 18:00:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:00:13,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:00:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:13,422 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:00:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:13,440 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:00:13,440 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:00:13,440 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:00:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-25 18:00:13,441 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:00:13,441 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:00:13,441 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:00:13,441 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 18:00:13,468 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-25 18:00:13,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 244 transitions, 518 flow [2023-08-25 18:00:13,518 INFO L124 PetriNetUnfolderBase]: 66/522 cut-off events. [2023-08-25 18:00:13,518 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:00:13,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 522 events. 66/522 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2007 event pairs, 1 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 351. Up to 16 conditions per place. [2023-08-25 18:00:13,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 244 transitions, 518 flow [2023-08-25 18:00:13,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 244 transitions, 518 flow [2023-08-25 18:00:13,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:00:13,525 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 221 places, 244 transitions, 518 flow [2023-08-25 18:00:13,525 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 221 places, 244 transitions, 518 flow [2023-08-25 18:00:13,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 244 transitions, 518 flow [2023-08-25 18:00:13,561 INFO L124 PetriNetUnfolderBase]: 66/522 cut-off events. [2023-08-25 18:00:13,561 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:00:13,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 522 events. 66/522 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2007 event pairs, 1 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 351. Up to 16 conditions per place. [2023-08-25 18:00:13,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 30096 [2023-08-25 18:00:16,497 INFO L134 LiptonReduction]: Checked pairs total: 105870 [2023-08-25 18:00:16,497 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-25 18:00:16,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:00:16,499 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:00:16,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:00:16,505 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:00:16,506 INFO L124 PetriNetUnfolderBase]: 22/129 cut-off events. [2023-08-25 18:00:16,506 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-25 18:00:16,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:00:16,506 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-25 18:00:16,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:00:16,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:00:16,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1031699738, now seen corresponding path program 1 times [2023-08-25 18:00:16,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:00:16,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752950600] [2023-08-25 18:00:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:00:16,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:00:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:16,525 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:00:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:16,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:00:16,544 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:00:16,544 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:00:16,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-25 18:00:16,544 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:00:16,545 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:00:16,545 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:00:16,545 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-25 18:00:16,561 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-25 18:00:16,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 290 transitions, 624 flow [2023-08-25 18:00:16,644 INFO L124 PetriNetUnfolderBase]: 101/793 cut-off events. [2023-08-25 18:00:16,644 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:00:16,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 793 events. 101/793 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3418 event pairs, 6 based on Foata normal form. 0/650 useless extension candidates. Maximal degree in co-relation 542. Up to 32 conditions per place. [2023-08-25 18:00:16,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 290 transitions, 624 flow [2023-08-25 18:00:16,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 290 transitions, 624 flow [2023-08-25 18:00:16,663 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:00:16,663 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 290 transitions, 624 flow [2023-08-25 18:00:16,663 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 290 transitions, 624 flow [2023-08-25 18:00:16,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 290 transitions, 624 flow [2023-08-25 18:00:16,740 INFO L124 PetriNetUnfolderBase]: 101/793 cut-off events. [2023-08-25 18:00:16,740 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:00:16,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 793 events. 101/793 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3418 event pairs, 6 based on Foata normal form. 0/650 useless extension candidates. Maximal degree in co-relation 542. Up to 32 conditions per place. [2023-08-25 18:00:16,768 INFO L119 LiptonReduction]: Number of co-enabled transitions 48400 [2023-08-25 18:00:19,829 INFO L134 LiptonReduction]: Checked pairs total: 208718 [2023-08-25 18:00:19,829 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-25 18:00:19,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:00:19,831 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:00:19,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:00:19,845 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:00:19,845 INFO L124 PetriNetUnfolderBase]: 40/201 cut-off events. [2023-08-25 18:00:19,845 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-25 18:00:19,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:00:19,846 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-25 18:00:19,846 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:00:19,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:00:19,846 INFO L85 PathProgramCache]: Analyzing trace with hash -155481683, now seen corresponding path program 1 times [2023-08-25 18:00:19,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:00:19,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119363801] [2023-08-25 18:00:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:00:19,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:00:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:19,870 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:00:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:19,887 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:00:19,888 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:00:19,888 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:00:19,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 18:00:19,888 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:00:19,888 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:00:19,888 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:00:19,889 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-25 18:00:19,905 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-25 18:00:19,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 336 transitions, 732 flow [2023-08-25 18:00:20,061 INFO L124 PetriNetUnfolderBase]: 164/1252 cut-off events. [2023-08-25 18:00:20,061 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:00:20,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1363 conditions, 1252 events. 164/1252 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 6275 event pairs, 23 based on Foata normal form. 0/1040 useless extension candidates. Maximal degree in co-relation 838. Up to 80 conditions per place. [2023-08-25 18:00:20,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 303 places, 336 transitions, 732 flow [2023-08-25 18:00:20,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 303 places, 336 transitions, 732 flow [2023-08-25 18:00:20,090 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:00:20,090 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 303 places, 336 transitions, 732 flow [2023-08-25 18:00:20,090 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 303 places, 336 transitions, 732 flow [2023-08-25 18:00:20,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 336 transitions, 732 flow [2023-08-25 18:00:20,230 INFO L124 PetriNetUnfolderBase]: 164/1252 cut-off events. [2023-08-25 18:00:20,231 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:00:20,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1363 conditions, 1252 events. 164/1252 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 6275 event pairs, 23 based on Foata normal form. 0/1040 useless extension candidates. Maximal degree in co-relation 838. Up to 80 conditions per place. [2023-08-25 18:00:20,291 INFO L119 LiptonReduction]: Number of co-enabled transitions 70840 [2023-08-25 18:00:23,329 INFO L134 LiptonReduction]: Checked pairs total: 317775 [2023-08-25 18:00:23,329 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-08-25 18:00:23,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:00:23,334 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:00:23,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:00:23,350 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:00:23,351 INFO L124 PetriNetUnfolderBase]: 55/272 cut-off events. [2023-08-25 18:00:23,351 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-25 18:00:23,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:00:23,351 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:00:23,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:00:23,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:00:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1875626847, now seen corresponding path program 1 times [2023-08-25 18:00:23,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:00:23,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933934481] [2023-08-25 18:00:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:00:23,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:00:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:23,395 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:00:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:23,412 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:00:23,412 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:00:23,412 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:00:23,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 18:00:23,412 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:00:23,413 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:00:23,413 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:00:23,413 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-25 18:00:23,430 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-25 18:00:23,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 382 transitions, 842 flow [2023-08-25 18:00:23,721 INFO L124 PetriNetUnfolderBase]: 291/2095 cut-off events. [2023-08-25 18:00:23,721 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:00:23,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2327 conditions, 2095 events. 291/2095 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 12790 event pairs, 72 based on Foata normal form. 0/1766 useless extension candidates. Maximal degree in co-relation 1351. Up to 192 conditions per place. [2023-08-25 18:00:23,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 382 transitions, 842 flow [2023-08-25 18:00:23,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 382 transitions, 842 flow [2023-08-25 18:00:23,769 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:00:23,769 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 344 places, 382 transitions, 842 flow [2023-08-25 18:00:23,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 344 places, 382 transitions, 842 flow [2023-08-25 18:00:23,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 382 transitions, 842 flow [2023-08-25 18:00:24,106 INFO L124 PetriNetUnfolderBase]: 291/2095 cut-off events. [2023-08-25 18:00:24,107 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:00:24,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2327 conditions, 2095 events. 291/2095 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 12790 event pairs, 72 based on Foata normal form. 0/1766 useless extension candidates. Maximal degree in co-relation 1351. Up to 192 conditions per place. [2023-08-25 18:00:24,203 INFO L119 LiptonReduction]: Number of co-enabled transitions 97416 [2023-08-25 18:00:27,268 INFO L134 LiptonReduction]: Checked pairs total: 394495 [2023-08-25 18:00:27,269 INFO L136 LiptonReduction]: Total number of compositions: 224 [2023-08-25 18:00:27,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:00:27,270 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:00:27,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:00:27,292 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:00:27,293 INFO L124 PetriNetUnfolderBase]: 73/355 cut-off events. [2023-08-25 18:00:27,293 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-25 18:00:27,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:00:27,293 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:00:27,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:00:27,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:00:27,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1083447221, now seen corresponding path program 1 times [2023-08-25 18:00:27,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:00:27,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041878781] [2023-08-25 18:00:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:00:27,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:00:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:27,329 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:00:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:27,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:00:27,358 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:00:27,358 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:00:27,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-25 18:00:27,358 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:00:27,359 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:00:27,359 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:00:27,359 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-25 18:00:27,393 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-25 18:00:27,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 385 places, 428 transitions, 954 flow [2023-08-25 18:00:28,026 INFO L124 PetriNetUnfolderBase]: 562/3722 cut-off events. [2023-08-25 18:00:28,028 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:00:28,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4220 conditions, 3722 events. 562/3722 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 27261 event pairs, 201 based on Foata normal form. 0/3180 useless extension candidates. Maximal degree in co-relation 2313. Up to 448 conditions per place. [2023-08-25 18:00:28,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 385 places, 428 transitions, 954 flow [2023-08-25 18:00:28,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 385 places, 428 transitions, 954 flow [2023-08-25 18:00:28,112 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:00:28,112 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 385 places, 428 transitions, 954 flow [2023-08-25 18:00:28,112 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 385 places, 428 transitions, 954 flow [2023-08-25 18:00:28,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 385 places, 428 transitions, 954 flow [2023-08-25 18:00:28,688 INFO L124 PetriNetUnfolderBase]: 562/3722 cut-off events. [2023-08-25 18:00:28,688 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:00:28,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4220 conditions, 3722 events. 562/3722 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 27261 event pairs, 201 based on Foata normal form. 0/3180 useless extension candidates. Maximal degree in co-relation 2313. Up to 448 conditions per place. [2023-08-25 18:00:29,093 INFO L119 LiptonReduction]: Number of co-enabled transitions 128128 [2023-08-25 18:00:32,321 INFO L134 LiptonReduction]: Checked pairs total: 600920 [2023-08-25 18:00:32,322 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-08-25 18:00:32,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:00:32,323 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:00:32,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:00:32,355 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:00:32,355 INFO L124 PetriNetUnfolderBase]: 89/446 cut-off events. [2023-08-25 18:00:32,355 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-25 18:00:32,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:00:32,355 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:00:32,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:00:32,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:00:32,356 INFO L85 PathProgramCache]: Analyzing trace with hash -271195581, now seen corresponding path program 1 times [2023-08-25 18:00:32,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:00:32,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930381588] [2023-08-25 18:00:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:00:32,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:00:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:32,389 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:00:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:32,408 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:00:32,408 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:00:32,412 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:00:32,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-25 18:00:32,412 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:00:32,413 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:00:32,413 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:00:32,413 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-25 18:00:32,434 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-25 18:00:32,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 426 places, 474 transitions, 1068 flow [2023-08-25 18:00:33,807 INFO L124 PetriNetUnfolderBase]: 1153/6949 cut-off events. [2023-08-25 18:00:33,807 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:00:33,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8034 conditions, 6949 events. 1153/6949 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 60798 event pairs, 522 based on Foata normal form. 0/6002 useless extension candidates. Maximal degree in co-relation 4204. Up to 1024 conditions per place. [2023-08-25 18:00:33,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 426 places, 474 transitions, 1068 flow [2023-08-25 18:00:33,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 426 places, 474 transitions, 1068 flow [2023-08-25 18:00:33,977 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:00:33,977 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 426 places, 474 transitions, 1068 flow [2023-08-25 18:00:33,977 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 426 places, 474 transitions, 1068 flow [2023-08-25 18:00:33,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 426 places, 474 transitions, 1068 flow [2023-08-25 18:00:35,329 INFO L124 PetriNetUnfolderBase]: 1153/6949 cut-off events. [2023-08-25 18:00:35,329 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:00:35,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8034 conditions, 6949 events. 1153/6949 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 60798 event pairs, 522 based on Foata normal form. 0/6002 useless extension candidates. Maximal degree in co-relation 4204. Up to 1024 conditions per place. [2023-08-25 18:00:35,780 INFO L119 LiptonReduction]: Number of co-enabled transitions 162976 [2023-08-25 18:00:39,271 INFO L134 LiptonReduction]: Checked pairs total: 690610 [2023-08-25 18:00:39,271 INFO L136 LiptonReduction]: Total number of compositions: 261 [2023-08-25 18:00:39,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:00:39,273 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:00:39,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:00:39,322 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:00:39,322 INFO L124 PetriNetUnfolderBase]: 128/594 cut-off events. [2023-08-25 18:00:39,322 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-25 18:00:39,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:00:39,323 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:00:39,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:00:39,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:00:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1663851363, now seen corresponding path program 1 times [2023-08-25 18:00:39,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:00:39,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594896489] [2023-08-25 18:00:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:00:39,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:00:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:39,336 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:00:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:39,349 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:00:39,349 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:00:39,349 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:00:39,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 18:00:39,349 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:00:39,350 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:00:39,350 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:00:39,350 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-25 18:00:39,369 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-25 18:00:39,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 467 places, 520 transitions, 1184 flow [2023-08-25 18:00:42,440 INFO L124 PetriNetUnfolderBase]: 2448/13440 cut-off events. [2023-08-25 18:00:42,441 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:00:42,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15817 conditions, 13440 events. 2448/13440 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 136587 event pairs, 1291 based on Foata normal form. 0/11704 useless extension candidates. Maximal degree in co-relation 8016. Up to 2304 conditions per place. [2023-08-25 18:00:42,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 467 places, 520 transitions, 1184 flow [2023-08-25 18:00:42,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 467 places, 520 transitions, 1184 flow [2023-08-25 18:00:42,826 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:00:42,826 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 467 places, 520 transitions, 1184 flow [2023-08-25 18:00:42,826 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 467 places, 520 transitions, 1184 flow [2023-08-25 18:00:42,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 467 places, 520 transitions, 1184 flow [2023-08-25 18:00:45,942 INFO L124 PetriNetUnfolderBase]: 2448/13440 cut-off events. [2023-08-25 18:00:45,943 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:00:46,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15817 conditions, 13440 events. 2448/13440 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 136587 event pairs, 1291 based on Foata normal form. 0/11704 useless extension candidates. Maximal degree in co-relation 8016. Up to 2304 conditions per place. [2023-08-25 18:00:46,823 INFO L119 LiptonReduction]: Number of co-enabled transitions 201960 [2023-08-25 18:00:50,334 INFO L134 LiptonReduction]: Checked pairs total: 859642 [2023-08-25 18:00:50,334 INFO L136 LiptonReduction]: Total number of compositions: 281 [2023-08-25 18:00:50,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:00:50,338 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:00:50,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:00:50,407 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:00:50,408 INFO L124 PetriNetUnfolderBase]: 176/780 cut-off events. [2023-08-25 18:00:50,408 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-08-25 18:00:50,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:00:50,408 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:00:50,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:00:50,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:00:50,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1953930447, now seen corresponding path program 1 times [2023-08-25 18:00:50,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:00:50,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001076654] [2023-08-25 18:00:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:00:50,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:00:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:50,427 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:00:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:00:50,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:00:50,446 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:00:50,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:00:50,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-25 18:00:50,447 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:00:50,450 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:00:50,450 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:00:50,452 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-25 18:00:50,474 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-25 18:00:50,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 508 places, 566 transitions, 1302 flow [2023-08-25 18:00:57,065 INFO L124 PetriNetUnfolderBase]: 5279/26587 cut-off events. [2023-08-25 18:00:57,065 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:00:57,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31793 conditions, 26587 events. 5279/26587 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 307252 event pairs, 3084 based on Foata normal form. 0/23294 useless extension candidates. Maximal degree in co-relation 15797. Up to 5120 conditions per place. [2023-08-25 18:00:57,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 508 places, 566 transitions, 1302 flow [2023-08-25 18:00:57,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 508 places, 566 transitions, 1302 flow [2023-08-25 18:00:57,868 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:00:57,869 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 508 places, 566 transitions, 1302 flow [2023-08-25 18:00:57,869 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 508 places, 566 transitions, 1302 flow [2023-08-25 18:00:57,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 508 places, 566 transitions, 1302 flow [2023-08-25 18:01:04,644 INFO L124 PetriNetUnfolderBase]: 5279/26587 cut-off events. [2023-08-25 18:01:04,645 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:01:05,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31793 conditions, 26587 events. 5279/26587 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 307252 event pairs, 3084 based on Foata normal form. 0/23294 useless extension candidates. Maximal degree in co-relation 15797. Up to 5120 conditions per place. [2023-08-25 18:01:06,840 INFO L119 LiptonReduction]: Number of co-enabled transitions 245080 [2023-08-25 18:01:10,521 INFO L134 LiptonReduction]: Checked pairs total: 1044227 [2023-08-25 18:01:10,521 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-08-25 18:01:10,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:01:10,522 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:01:10,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:01:10,624 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:01:10,625 INFO L124 PetriNetUnfolderBase]: 241/1009 cut-off events. [2023-08-25 18:01:10,625 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2023-08-25 18:01:10,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:01:10,625 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:01:10,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:01:10,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:01:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1631956576, now seen corresponding path program 1 times [2023-08-25 18:01:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:01:10,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682930917] [2023-08-25 18:01:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:01:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:01:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:01:10,647 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:01:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:01:10,666 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:01:10,666 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:01:10,667 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:01:10,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-25 18:01:10,667 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:01:10,667 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:01:10,667 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:01:10,667 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-25 18:01:10,695 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-25 18:01:10,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 549 places, 612 transitions, 1422 flow [2023-08-25 18:01:25,175 INFO L124 PetriNetUnfolderBase]: 11438/53302 cut-off events. [2023-08-25 18:01:25,175 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:01:26,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64666 conditions, 53302 events. 11438/53302 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 683969 event pairs, 7181 based on Foata normal form. 0/46916 useless extension candidates. Maximal degree in co-relation 31771. Up to 11264 conditions per place. [2023-08-25 18:01:26,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 549 places, 612 transitions, 1422 flow [2023-08-25 18:01:27,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 549 places, 612 transitions, 1422 flow [2023-08-25 18:01:27,744 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:01:27,744 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 549 places, 612 transitions, 1422 flow [2023-08-25 18:01:27,744 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 549 places, 612 transitions, 1422 flow [2023-08-25 18:01:27,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 549 places, 612 transitions, 1422 flow [2023-08-25 18:01:41,881 INFO L124 PetriNetUnfolderBase]: 11438/53302 cut-off events. [2023-08-25 18:01:41,881 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:01:43,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64666 conditions, 53302 events. 11438/53302 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 683969 event pairs, 7181 based on Foata normal form. 0/46916 useless extension candidates. Maximal degree in co-relation 31771. Up to 11264 conditions per place. [2023-08-25 18:01:46,817 INFO L119 LiptonReduction]: Number of co-enabled transitions 292336 [2023-08-25 18:01:50,522 INFO L134 LiptonReduction]: Checked pairs total: 1440808 [2023-08-25 18:01:50,522 INFO L136 LiptonReduction]: Total number of compositions: 313 [2023-08-25 18:01:50,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:01:50,523 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:01:50,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:01:50,677 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:01:50,677 INFO L124 PetriNetUnfolderBase]: 368/1417 cut-off events. [2023-08-25 18:01:50,677 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2023-08-25 18:01:50,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:01:50,677 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:01:50,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:01:50,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:01:50,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2031575184, now seen corresponding path program 1 times [2023-08-25 18:01:50,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:01:50,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675197218] [2023-08-25 18:01:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:01:50,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:01:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:01:50,702 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:01:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:01:50,722 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:01:50,722 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:01:50,722 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:01:50,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-25 18:01:50,723 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:01:50,723 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:01:50,723 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:01:50,723 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-25 18:01:50,746 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-25 18:01:50,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 590 places, 658 transitions, 1544 flow [2023-08-25 18:02:22,979 INFO L124 PetriNetUnfolderBase]: 24765/107665 cut-off events. [2023-08-25 18:02:22,979 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:02:30,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132356 conditions, 107665 events. 24765/107665 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 1519279 event pairs, 16398 based on Foata normal form. 0/95114 useless extension candidates. Maximal degree in co-relation 64642. Up to 24576 conditions per place. [2023-08-25 18:02:30,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 590 places, 658 transitions, 1544 flow [2023-08-25 18:02:31,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 590 places, 658 transitions, 1544 flow [2023-08-25 18:02:31,854 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:02:31,854 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 590 places, 658 transitions, 1544 flow [2023-08-25 18:02:31,854 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 590 places, 658 transitions, 1544 flow [2023-08-25 18:02:31,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 590 places, 658 transitions, 1544 flow [2023-08-25 18:03:04,189 INFO L124 PetriNetUnfolderBase]: 24765/107665 cut-off events. [2023-08-25 18:03:04,189 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:03:11,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132356 conditions, 107665 events. 24765/107665 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 1519279 event pairs, 16398 based on Foata normal form. 0/95114 useless extension candidates. Maximal degree in co-relation 64642. Up to 24576 conditions per place. [2023-08-25 18:03:24,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 343728 [2023-08-25 18:03:28,220 INFO L134 LiptonReduction]: Checked pairs total: 1500810 [2023-08-25 18:03:28,220 INFO L136 LiptonReduction]: Total number of compositions: 337 [2023-08-25 18:03:28,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:03:28,221 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;@67c5d661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:03:28,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:03:28,459 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:03:28,460 INFO L124 PetriNetUnfolderBase]: 593/2052 cut-off events. [2023-08-25 18:03:28,460 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-25 18:03:28,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:03:28,460 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 18:03:28,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:03:28,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:03:28,460 INFO L85 PathProgramCache]: Analyzing trace with hash 376627930, now seen corresponding path program 1 times [2023-08-25 18:03:28,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:03:28,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359167293] [2023-08-25 18:03:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:03:28,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:03:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:03:28,495 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:03:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:03:28,510 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:03:28,510 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:03:28,510 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:03:28,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-25 18:03:28,510 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:03:28,510 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:03:28,511 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:03:28,511 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-25 18:03:28,543 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-25 18:03:28,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 631 places, 704 transitions, 1668 flow [2023-08-25 18:04:43,307 INFO L124 PetriNetUnfolderBase]: 53452/218348 cut-off events. [2023-08-25 18:04:43,308 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-25 18:05:03,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271727 conditions, 218348 events. 53452/218348 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 3166. Compared 3339173 event pairs, 36879 based on Foata normal form. 0/193488 useless extension candidates. Maximal degree in co-relation 132330. Up to 53248 conditions per place. [2023-08-25 18:05:03,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 631 places, 704 transitions, 1668 flow [2023-08-25 18:05:10,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 631 places, 704 transitions, 1668 flow [2023-08-25 18:05:10,146 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:05:10,146 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 631 places, 704 transitions, 1668 flow [2023-08-25 18:05:10,146 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 631 places, 704 transitions, 1668 flow [2023-08-25 18:05:10,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 631 places, 704 transitions, 1668 flow