/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 -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 06:45:52,665 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 06:45:52,731 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 [2023-08-24 06:45:52,735 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 06:45:52,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 06:45:52,758 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 06:45:52,758 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 06:45:52,758 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 06:45:52,759 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 06:45:52,762 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 06:45:52,762 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 06:45:52,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 06:45:52,762 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 06:45:52,763 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 06:45:52,763 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 06:45:52,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 06:45:52,764 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 06:45:52,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 06:45:52,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 06:45:52,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 06:45:52,764 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 06:45:52,765 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 06:45:52,765 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 06:45:52,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 06:45:52,766 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 06:45:52,766 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 06:45:52,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 06:45:52,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:45:52,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 06:45:52,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 06:45:52,767 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 06:45:52,767 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 06:45:52,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 06:45:52,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 06:45:52,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 06:45:52,768 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 06:45:53,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 06:45:53,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 06:45:53,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 06:45:53,112 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 06:45:53,112 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 06:45:53,113 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-08-24 06:45:54,109 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 06:45:54,365 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 06:45:54,365 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-08-24 06:45:54,378 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d09236b8/32e8a1faacb74678a77eb911b8cbd821/FLAG5925f96d0 [2023-08-24 06:45:54,388 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d09236b8/32e8a1faacb74678a77eb911b8cbd821 [2023-08-24 06:45:54,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 06:45:54,391 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 06:45:54,391 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 06:45:54,391 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 06:45:54,393 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 06:45:54,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,395 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2ccff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54, skipping insertion in model container [2023-08-24 06:45:54,395 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,431 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 06:45:54,711 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2023-08-24 06:45:54,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:45:54,746 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 06:45:54,766 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:45:54,767 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:45:54,774 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2023-08-24 06:45:54,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:45:54,844 INFO L206 MainTranslator]: Completed translation [2023-08-24 06:45:54,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54 WrapperNode [2023-08-24 06:45:54,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 06:45:54,846 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 06:45:54,846 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 06:45:54,846 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 06:45:54,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,872 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,899 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 206 [2023-08-24 06:45:54,899 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 06:45:54,900 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 06:45:54,900 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 06:45:54,900 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 06:45:54,905 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,919 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,919 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,923 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,926 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,927 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,928 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,930 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 06:45:54,930 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 06:45:54,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 06:45:54,930 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 06:45:54,931 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (1/1) ... [2023-08-24 06:45:54,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:45:54,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:54,965 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) [2023-08-24 06:45:54,968 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 [2023-08-24 06:45:54,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 06:45:54,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 06:45:54,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 06:45:54,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 06:45:54,994 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 06:45:54,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 06:45:54,994 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 06:45:54,994 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 06:45:54,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 06:45:54,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 06:45:54,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 06:45:54,995 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 06:45:55,093 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 06:45:55,095 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 06:45:55,375 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 06:45:55,380 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 06:45:55,380 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-08-24 06:45:55,381 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:45:55 BoogieIcfgContainer [2023-08-24 06:45:55,381 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 06:45:55,383 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 06:45:55,383 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 06:45:55,391 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 06:45:55,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 06:45:54" (1/3) ... [2023-08-24 06:45:55,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6808e1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:45:55, skipping insertion in model container [2023-08-24 06:45:55,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:54" (2/3) ... [2023-08-24 06:45:55,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6808e1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:45:55, skipping insertion in model container [2023-08-24 06:45:55,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:45:55" (3/3) ... [2023-08-24 06:45:55,392 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_78-equ_racing.i [2023-08-24 06:45:55,402 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 06:45:55,402 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 06:45:55,402 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 06:45:55,435 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 06:45:55,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 203 transitions, 414 flow [2023-08-24 06:45:55,508 INFO L124 PetriNetUnfolderBase]: 43/275 cut-off events. [2023-08-24 06:45:55,508 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 06:45:55,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 275 events. 43/275 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 838 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-24 06:45:55,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 203 transitions, 414 flow [2023-08-24 06:45:55,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 196 transitions, 397 flow [2023-08-24 06:45:55,522 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:45:55,527 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 196 transitions, 397 flow [2023-08-24 06:45:55,529 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 196 transitions, 397 flow [2023-08-24 06:45:55,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 196 transitions, 397 flow [2023-08-24 06:45:55,569 INFO L124 PetriNetUnfolderBase]: 41/268 cut-off events. [2023-08-24 06:45:55,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:55,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 268 events. 41/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 820 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-24 06:45:55,578 INFO L119 LiptonReduction]: Number of co-enabled transitions 8892 [2023-08-24 06:46:00,036 INFO L134 LiptonReduction]: Checked pairs total: 16908 [2023-08-24 06:46:00,036 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-24 06:46:00,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:46:00,057 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;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:46:00,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:46:00,063 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:46:00,063 INFO L124 PetriNetUnfolderBase]: 11/39 cut-off events. [2023-08-24 06:46:00,063 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:46:00,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:00,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 06:46:00,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:00,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1234902606, now seen corresponding path program 1 times [2023-08-24 06:46:00,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:00,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254849552] [2023-08-24 06:46:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:00,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:00,169 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:46:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:00,204 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:46:00,206 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:46:00,206 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:46:00,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 06:46:00,208 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:46:00,209 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:46:00,210 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:46:00,210 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 06:46:00,229 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 06:46:00,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 262 transitions, 542 flow [2023-08-24 06:46:00,276 INFO L124 PetriNetUnfolderBase]: 72/431 cut-off events. [2023-08-24 06:46:00,276 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 06:46:00,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 431 events. 72/431 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1629 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 277. Up to 12 conditions per place. [2023-08-24 06:46:00,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 262 transitions, 542 flow [2023-08-24 06:46:00,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 260 transitions, 538 flow [2023-08-24 06:46:00,283 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:46:00,283 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 260 transitions, 538 flow [2023-08-24 06:46:00,284 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 260 transitions, 538 flow [2023-08-24 06:46:00,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 260 transitions, 538 flow [2023-08-24 06:46:00,320 INFO L124 PetriNetUnfolderBase]: 71/429 cut-off events. [2023-08-24 06:46:00,320 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 06:46:00,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 429 events. 71/429 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1645 event pairs, 0 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 275. Up to 12 conditions per place. [2023-08-24 06:46:00,334 INFO L119 LiptonReduction]: Number of co-enabled transitions 25536 [2023-08-24 06:46:05,037 INFO L134 LiptonReduction]: Checked pairs total: 52691 [2023-08-24 06:46:05,038 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-08-24 06:46:05,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:46:05,040 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:46:05,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:46:05,045 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:46:05,045 INFO L124 PetriNetUnfolderBase]: 36/109 cut-off events. [2023-08-24 06:46:05,045 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 06:46:05,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:05,045 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 06:46:05,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:05,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1945039356, now seen corresponding path program 1 times [2023-08-24 06:46:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:05,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055331937] [2023-08-24 06:46:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:05,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:05,075 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:46:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:05,102 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:46:05,102 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:46:05,102 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:46:05,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 06:46:05,102 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:46:05,103 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:46:05,103 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:46:05,103 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 06:46:05,120 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 06:46:05,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 321 transitions, 672 flow [2023-08-24 06:46:05,167 INFO L124 PetriNetUnfolderBase]: 106/620 cut-off events. [2023-08-24 06:46:05,167 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 06:46:05,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 620 events. 106/620 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2599 event pairs, 1 based on Foata normal form. 0/503 useless extension candidates. Maximal degree in co-relation 439. Up to 16 conditions per place. [2023-08-24 06:46:05,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 321 transitions, 672 flow [2023-08-24 06:46:05,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 319 transitions, 668 flow [2023-08-24 06:46:05,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:46:05,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 319 transitions, 668 flow [2023-08-24 06:46:05,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 319 transitions, 668 flow [2023-08-24 06:46:05,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 319 transitions, 668 flow [2023-08-24 06:46:05,220 INFO L124 PetriNetUnfolderBase]: 105/618 cut-off events. [2023-08-24 06:46:05,220 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 06:46:05,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 618 events. 105/618 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2610 event pairs, 1 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 437. Up to 16 conditions per place. [2023-08-24 06:46:05,237 INFO L119 LiptonReduction]: Number of co-enabled transitions 48564 [2023-08-24 06:46:11,787 INFO L134 LiptonReduction]: Checked pairs total: 112997 [2023-08-24 06:46:11,787 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-08-24 06:46:11,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:46:11,789 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;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:46:11,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:46:11,797 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:46:11,797 INFO L124 PetriNetUnfolderBase]: 60/177 cut-off events. [2023-08-24 06:46:11,797 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 06:46:11,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:11,797 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 06:46:11,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:11,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:11,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1513410756, now seen corresponding path program 1 times [2023-08-24 06:46:11,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:11,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065606908] [2023-08-24 06:46:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:11,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:11,823 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:46:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:11,874 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:46:11,874 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:46:11,875 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:46:11,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 06:46:11,875 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:46:11,875 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:46:11,875 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:46:11,875 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 06:46:11,907 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 06:46:11,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 380 transitions, 804 flow [2023-08-24 06:46:12,012 INFO L124 PetriNetUnfolderBase]: 152/877 cut-off events. [2023-08-24 06:46:12,013 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 06:46:12,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 877 events. 152/877 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3988 event pairs, 6 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 640. Up to 32 conditions per place. [2023-08-24 06:46:12,030 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 380 transitions, 804 flow [2023-08-24 06:46:12,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 378 transitions, 800 flow [2023-08-24 06:46:12,041 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:46:12,041 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 378 transitions, 800 flow [2023-08-24 06:46:12,041 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 378 transitions, 800 flow [2023-08-24 06:46:12,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 378 transitions, 800 flow [2023-08-24 06:46:12,169 INFO L124 PetriNetUnfolderBase]: 151/875 cut-off events. [2023-08-24 06:46:12,169 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 06:46:12,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 875 events. 151/875 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3981 event pairs, 6 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 638. Up to 32 conditions per place. [2023-08-24 06:46:12,199 INFO L119 LiptonReduction]: Number of co-enabled transitions 78432 [2023-08-24 06:46:17,580 INFO L134 LiptonReduction]: Checked pairs total: 187060 [2023-08-24 06:46:17,581 INFO L136 LiptonReduction]: Total number of compositions: 296 [2023-08-24 06:46:17,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:46:17,584 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;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:46:17,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:46:17,598 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:46:17,598 INFO L124 PetriNetUnfolderBase]: 91/255 cut-off events. [2023-08-24 06:46:17,598 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 06:46:17,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:17,598 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:17,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:17,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:17,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1638004543, now seen corresponding path program 1 times [2023-08-24 06:46:17,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:17,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534757767] [2023-08-24 06:46:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:17,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:17,633 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:46:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:17,651 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:46:17,651 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:46:17,651 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:46:17,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 06:46:17,651 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:46:17,652 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:46:17,652 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:46:17,652 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 06:46:17,671 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 06:46:17,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 439 transitions, 938 flow [2023-08-24 06:46:17,803 INFO L124 PetriNetUnfolderBase]: 226/1274 cut-off events. [2023-08-24 06:46:17,803 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 06:46:17,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 1274 events. 226/1274 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6403 event pairs, 23 based on Foata normal form. 0/1053 useless extension candidates. Maximal degree in co-relation 922. Up to 80 conditions per place. [2023-08-24 06:46:17,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 369 places, 439 transitions, 938 flow [2023-08-24 06:46:17,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 368 places, 437 transitions, 934 flow [2023-08-24 06:46:17,837 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:46:17,837 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 368 places, 437 transitions, 934 flow [2023-08-24 06:46:17,837 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 368 places, 437 transitions, 934 flow [2023-08-24 06:46:17,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 368 places, 437 transitions, 934 flow [2023-08-24 06:46:17,981 INFO L124 PetriNetUnfolderBase]: 225/1272 cut-off events. [2023-08-24 06:46:17,982 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 06:46:18,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 1272 events. 225/1272 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6412 event pairs, 23 based on Foata normal form. 0/1052 useless extension candidates. Maximal degree in co-relation 920. Up to 80 conditions per place. [2023-08-24 06:46:18,047 INFO L119 LiptonReduction]: Number of co-enabled transitions 115140 [2023-08-24 06:46:24,709 INFO L134 LiptonReduction]: Checked pairs total: 279731 [2023-08-24 06:46:24,709 INFO L136 LiptonReduction]: Total number of compositions: 338 [2023-08-24 06:46:24,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:46:24,714 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;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:46:24,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:46:24,735 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:46:24,735 INFO L124 PetriNetUnfolderBase]: 115/329 cut-off events. [2023-08-24 06:46:24,735 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-24 06:46:24,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:24,736 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:24,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:24,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1692862772, now seen corresponding path program 1 times [2023-08-24 06:46:24,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:24,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274393638] [2023-08-24 06:46:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:24,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:24,775 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:46:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:24,815 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:46:24,815 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:46:24,815 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:46:24,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 06:46:24,815 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:46:24,816 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:46:24,816 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:46:24,816 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-24 06:46:24,842 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-24 06:46:24,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 417 places, 498 transitions, 1074 flow [2023-08-24 06:46:25,136 INFO L124 PetriNetUnfolderBase]: 364/1959 cut-off events. [2023-08-24 06:46:25,136 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-24 06:46:25,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2191 conditions, 1959 events. 364/1959 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 11300 event pairs, 72 based on Foata normal form. 0/1646 useless extension candidates. Maximal degree in co-relation 1373. Up to 192 conditions per place. [2023-08-24 06:46:25,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 417 places, 498 transitions, 1074 flow [2023-08-24 06:46:25,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 416 places, 496 transitions, 1070 flow [2023-08-24 06:46:25,194 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:46:25,194 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 416 places, 496 transitions, 1070 flow [2023-08-24 06:46:25,195 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 416 places, 496 transitions, 1070 flow [2023-08-24 06:46:25,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 416 places, 496 transitions, 1070 flow [2023-08-24 06:46:25,449 INFO L124 PetriNetUnfolderBase]: 363/1957 cut-off events. [2023-08-24 06:46:25,450 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-24 06:46:25,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2189 conditions, 1957 events. 363/1957 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 11363 event pairs, 72 based on Foata normal form. 0/1645 useless extension candidates. Maximal degree in co-relation 1371. Up to 192 conditions per place. [2023-08-24 06:46:25,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 158688 [2023-08-24 06:46:31,077 INFO L134 LiptonReduction]: Checked pairs total: 389041 [2023-08-24 06:46:31,077 INFO L136 LiptonReduction]: Total number of compositions: 372 [2023-08-24 06:46:31,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:46:31,081 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;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:46:31,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:46:31,104 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:46:31,105 INFO L124 PetriNetUnfolderBase]: 139/414 cut-off events. [2023-08-24 06:46:31,105 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-24 06:46:31,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:31,105 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:31,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:31,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:31,105 INFO L85 PathProgramCache]: Analyzing trace with hash -717176688, now seen corresponding path program 1 times [2023-08-24 06:46:31,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:31,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767473303] [2023-08-24 06:46:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:31,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:31,143 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:46:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:31,180 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:46:31,180 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:46:31,180 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:46:31,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 06:46:31,181 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:46:31,184 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:46:31,184 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:46:31,185 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-24 06:46:31,220 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-24 06:46:31,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 465 places, 557 transitions, 1212 flow [2023-08-24 06:46:31,855 INFO L124 PetriNetUnfolderBase]: 646/3236 cut-off events. [2023-08-24 06:46:31,855 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-24 06:46:31,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3734 conditions, 3236 events. 646/3236 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 21970 event pairs, 201 based on Foata normal form. 0/2767 useless extension candidates. Maximal degree in co-relation 2177. Up to 448 conditions per place. [2023-08-24 06:46:31,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 465 places, 557 transitions, 1212 flow [2023-08-24 06:46:31,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 464 places, 555 transitions, 1208 flow [2023-08-24 06:46:31,929 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:46:31,929 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 464 places, 555 transitions, 1208 flow [2023-08-24 06:46:31,929 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 464 places, 555 transitions, 1208 flow [2023-08-24 06:46:31,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 464 places, 555 transitions, 1208 flow [2023-08-24 06:46:32,425 INFO L124 PetriNetUnfolderBase]: 645/3234 cut-off events. [2023-08-24 06:46:32,425 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-24 06:46:32,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 3234 events. 645/3234 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 22012 event pairs, 201 based on Foata normal form. 0/2766 useless extension candidates. Maximal degree in co-relation 2175. Up to 448 conditions per place. [2023-08-24 06:46:32,695 INFO L119 LiptonReduction]: Number of co-enabled transitions 209076 [2023-08-24 06:46:38,613 INFO L134 LiptonReduction]: Checked pairs total: 524217 [2023-08-24 06:46:38,613 INFO L136 LiptonReduction]: Total number of compositions: 407 [2023-08-24 06:46:38,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:46:38,616 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;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:46:38,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:46:38,647 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:46:38,647 INFO L124 PetriNetUnfolderBase]: 175/521 cut-off events. [2023-08-24 06:46:38,647 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-24 06:46:38,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:38,647 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:38,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:38,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:38,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1172078167, now seen corresponding path program 1 times [2023-08-24 06:46:38,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:38,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449088467] [2023-08-24 06:46:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:38,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:38,671 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:46:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:38,687 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:46:38,687 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:46:38,687 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:46:38,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 06:46:38,687 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:46:38,688 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:46:38,688 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:46:38,688 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-24 06:46:38,714 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-24 06:46:38,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 513 places, 616 transitions, 1352 flow [2023-08-24 06:46:40,060 INFO L124 PetriNetUnfolderBase]: 1248/5729 cut-off events. [2023-08-24 06:46:40,060 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-24 06:46:40,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6814 conditions, 5729 events. 1248/5729 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 45461 event pairs, 522 based on Foata normal form. 0/4976 useless extension candidates. Maximal degree in co-relation 3718. Up to 1024 conditions per place. [2023-08-24 06:46:40,172 INFO L82 GeneralOperation]: Start removeDead. Operand has 513 places, 616 transitions, 1352 flow [2023-08-24 06:46:40,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 512 places, 614 transitions, 1348 flow [2023-08-24 06:46:40,222 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:46:40,222 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 512 places, 614 transitions, 1348 flow [2023-08-24 06:46:40,222 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 512 places, 614 transitions, 1348 flow [2023-08-24 06:46:40,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 512 places, 614 transitions, 1348 flow [2023-08-24 06:46:41,392 INFO L124 PetriNetUnfolderBase]: 1247/5727 cut-off events. [2023-08-24 06:46:41,393 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-24 06:46:41,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6812 conditions, 5727 events. 1247/5727 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 45475 event pairs, 522 based on Foata normal form. 0/4975 useless extension candidates. Maximal degree in co-relation 3716. Up to 1024 conditions per place. [2023-08-24 06:46:41,867 INFO L119 LiptonReduction]: Number of co-enabled transitions 266304 [2023-08-24 06:46:47,098 INFO L134 LiptonReduction]: Checked pairs total: 615352 [2023-08-24 06:46:47,098 INFO L136 LiptonReduction]: Total number of compositions: 449 [2023-08-24 06:46:47,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:46:47,099 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;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:46:47,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:46:47,141 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:46:47,141 INFO L124 PetriNetUnfolderBase]: 221/662 cut-off events. [2023-08-24 06:46:47,142 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-24 06:46:47,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:47,142 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:47,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:47,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:47,142 INFO L85 PathProgramCache]: Analyzing trace with hash 572685115, now seen corresponding path program 1 times [2023-08-24 06:46:47,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:47,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805682723] [2023-08-24 06:46:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:47,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:47,157 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:46:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:47,171 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:46:47,171 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:46:47,171 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:46:47,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 06:46:47,171 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:46:47,171 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:46:47,172 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:46:47,172 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-24 06:46:47,199 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-24 06:46:47,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 561 places, 675 transitions, 1494 flow [2023-08-24 06:46:49,897 INFO L124 PetriNetUnfolderBase]: 2554/10718 cut-off events. [2023-08-24 06:46:49,897 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-24 06:46:50,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13095 conditions, 10718 events. 2554/10718 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 98323 event pairs, 1291 based on Foata normal form. 0/9425 useless extension candidates. Maximal degree in co-relation 6796. Up to 2304 conditions per place. [2023-08-24 06:46:50,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 561 places, 675 transitions, 1494 flow [2023-08-24 06:46:50,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 560 places, 673 transitions, 1490 flow [2023-08-24 06:46:50,436 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:46:50,436 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 560 places, 673 transitions, 1490 flow [2023-08-24 06:46:50,436 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 560 places, 673 transitions, 1490 flow [2023-08-24 06:46:50,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 560 places, 673 transitions, 1490 flow [2023-08-24 06:46:53,072 INFO L124 PetriNetUnfolderBase]: 2553/10716 cut-off events. [2023-08-24 06:46:53,072 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-24 06:46:53,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13093 conditions, 10716 events. 2553/10716 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 98254 event pairs, 1291 based on Foata normal form. 0/9424 useless extension candidates. Maximal degree in co-relation 6794. Up to 2304 conditions per place. [2023-08-24 06:46:54,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 330372 [2023-08-24 06:47:02,099 INFO L134 LiptonReduction]: Checked pairs total: 842290 [2023-08-24 06:47:02,099 INFO L136 LiptonReduction]: Total number of compositions: 499 [2023-08-24 06:47:02,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:47:02,101 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;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:47:02,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:47:02,163 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:47:02,163 INFO L124 PetriNetUnfolderBase]: 282/846 cut-off events. [2023-08-24 06:47:02,163 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-08-24 06:47:02,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:47:02,164 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:47:02,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:47:02,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:47:02,164 INFO L85 PathProgramCache]: Analyzing trace with hash 929490403, now seen corresponding path program 1 times [2023-08-24 06:47:02,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:47:02,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494499674] [2023-08-24 06:47:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:47:02,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:47:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:47:02,180 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:47:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:47:02,195 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:47:02,195 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:47:02,195 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:47:02,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 06:47:02,195 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:47:02,196 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:47:02,196 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:47:02,196 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-24 06:47:02,227 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-24 06:47:02,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 609 places, 734 transitions, 1638 flow [2023-08-24 06:47:07,878 INFO L124 PetriNetUnfolderBase]: 5396/20827 cut-off events. [2023-08-24 06:47:07,878 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-24 06:47:08,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26033 conditions, 20827 events. 5396/20827 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 217718 event pairs, 3084 based on Foata normal form. 0/18482 useless extension candidates. Maximal degree in co-relation 13075. Up to 5120 conditions per place. [2023-08-24 06:47:08,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 609 places, 734 transitions, 1638 flow [2023-08-24 06:47:08,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 608 places, 732 transitions, 1634 flow [2023-08-24 06:47:08,728 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:47:08,728 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 608 places, 732 transitions, 1634 flow [2023-08-24 06:47:08,728 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 608 places, 732 transitions, 1634 flow [2023-08-24 06:47:08,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 608 places, 732 transitions, 1634 flow [2023-08-24 06:47:14,612 INFO L124 PetriNetUnfolderBase]: 5395/20825 cut-off events. [2023-08-24 06:47:14,612 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-24 06:47:15,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26031 conditions, 20825 events. 5395/20825 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 217975 event pairs, 3084 based on Foata normal form. 0/18481 useless extension candidates. Maximal degree in co-relation 13073. Up to 5120 conditions per place. [2023-08-24 06:47:16,815 INFO L119 LiptonReduction]: Number of co-enabled transitions 401280 [2023-08-24 06:47:23,780 INFO L134 LiptonReduction]: Checked pairs total: 937873 [2023-08-24 06:47:23,781 INFO L136 LiptonReduction]: Total number of compositions: 536 [2023-08-24 06:47:23,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:47:23,783 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;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:47:23,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:47:23,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:47:23,883 INFO L124 PetriNetUnfolderBase]: 360/1091 cut-off events. [2023-08-24 06:47:23,883 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2023-08-24 06:47:23,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:47:23,883 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:47:23,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:47:23,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:47:23,883 INFO L85 PathProgramCache]: Analyzing trace with hash 889011279, now seen corresponding path program 1 times [2023-08-24 06:47:23,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:47:23,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030070867] [2023-08-24 06:47:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:47:23,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:47:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:47:23,913 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:47:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:47:23,928 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:47:23,928 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:47:23,928 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:47:23,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 06:47:23,928 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:47:23,928 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:47:23,928 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:47:23,928 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-24 06:47:23,960 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-24 06:47:23,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 657 places, 793 transitions, 1784 flow [2023-08-24 06:47:36,190 INFO L124 PetriNetUnfolderBase]: 11566/41432 cut-off events. [2023-08-24 06:47:36,190 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-24 06:47:37,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52796 conditions, 41432 events. 11566/41432 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 482995 event pairs, 7181 based on Foata normal form. 0/37011 useless extension candidates. Maximal degree in co-relation 26011. Up to 11264 conditions per place. [2023-08-24 06:47:37,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 657 places, 793 transitions, 1784 flow [2023-08-24 06:47:38,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 656 places, 791 transitions, 1780 flow [2023-08-24 06:47:38,584 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:47:38,585 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 656 places, 791 transitions, 1780 flow [2023-08-24 06:47:38,585 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 656 places, 791 transitions, 1780 flow [2023-08-24 06:47:38,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 656 places, 791 transitions, 1780 flow [2023-08-24 06:47:51,416 INFO L124 PetriNetUnfolderBase]: 11565/41430 cut-off events. [2023-08-24 06:47:51,416 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-24 06:47:55,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52794 conditions, 41430 events. 11565/41430 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 482891 event pairs, 7181 based on Foata normal form. 0/37010 useless extension candidates. Maximal degree in co-relation 26009. Up to 11264 conditions per place. [2023-08-24 06:48:00,033 INFO L119 LiptonReduction]: Number of co-enabled transitions 479028 [2023-08-24 06:48:07,346 INFO L134 LiptonReduction]: Checked pairs total: 1350318 [2023-08-24 06:48:07,347 INFO L136 LiptonReduction]: Total number of compositions: 580 [2023-08-24 06:48:07,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:48:07,348 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;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:48:07,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:48:07,493 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:48:07,493 INFO L124 PetriNetUnfolderBase]: 513/1484 cut-off events. [2023-08-24 06:48:07,493 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2023-08-24 06:48:07,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:48:07,493 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:48:07,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:48:07,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:48:07,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1389646795, now seen corresponding path program 1 times [2023-08-24 06:48:07,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:48:07,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164089310] [2023-08-24 06:48:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:48:07,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:48:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:48:07,523 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:48:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:48:07,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:48:07,553 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:48:07,554 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:48:07,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 06:48:07,554 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:48:07,554 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:48:07,555 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:48:07,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-24 06:48:07,590 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-24 06:48:07,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 705 places, 852 transitions, 1932 flow [2023-08-24 06:48:37,048 INFO L124 PetriNetUnfolderBase]: 24904/83541 cut-off events. [2023-08-24 06:48:37,049 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-24 06:48:43,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108232 conditions, 83541 events. 24904/83541 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1417. Compared 1067507 event pairs, 16398 based on Foata normal form. 0/74996 useless extension candidates. Maximal degree in co-relation 52772. Up to 24576 conditions per place. [2023-08-24 06:48:43,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 705 places, 852 transitions, 1932 flow [2023-08-24 06:48:45,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 704 places, 850 transitions, 1928 flow [2023-08-24 06:48:45,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:48:45,556 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 704 places, 850 transitions, 1928 flow [2023-08-24 06:48:45,556 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 704 places, 850 transitions, 1928 flow [2023-08-24 06:48:45,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 704 places, 850 transitions, 1928 flow [2023-08-24 06:49:13,875 INFO L124 PetriNetUnfolderBase]: 24903/83539 cut-off events. [2023-08-24 06:49:13,875 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-24 06:49:21,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108230 conditions, 83539 events. 24903/83539 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1417. Compared 1067092 event pairs, 16398 based on Foata normal form. 0/74995 useless extension candidates. Maximal degree in co-relation 52770. Up to 24576 conditions per place. [2023-08-24 06:49:30,081 INFO L119 LiptonReduction]: Number of co-enabled transitions 563616 [2023-08-24 06:49:37,162 INFO L134 LiptonReduction]: Checked pairs total: 1455547 [2023-08-24 06:49:37,163 INFO L136 LiptonReduction]: Total number of compositions: 619 [2023-08-24 06:49:37,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:49:37,164 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;@5500147c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:49:37,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:49:37,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:49:37,377 INFO L124 PetriNetUnfolderBase]: 726/2041 cut-off events. [2023-08-24 06:49:37,377 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-24 06:49:37,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:49:37,377 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:49:37,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:49:37,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:49:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash 890024651, now seen corresponding path program 1 times [2023-08-24 06:49:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:49:37,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75550325] [2023-08-24 06:49:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:49:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:49:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:49:37,397 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:49:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:49:37,413 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:49:37,414 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:49:37,414 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:49:37,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 06:49:37,414 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:49:37,414 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:49:37,414 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:49:37,414 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-24 06:49:37,452 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-24 06:49:37,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 753 places, 911 transitions, 2082 flow [2023-08-24 06:50:46,038 INFO L124 PetriNetUnfolderBase]: 53602/169682 cut-off events. [2023-08-24 06:50:46,039 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES.