/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_42-trylock2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 06:37:24,551 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 06:37:24,621 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 06:37:24,625 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 06:37:24,626 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 06:37:24,657 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 06:37:24,658 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 06:37:24,659 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 06:37:24,659 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 06:37:24,663 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 06:37:24,663 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 06:37:24,663 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 06:37:24,664 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 06:37:24,665 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 06:37:24,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 06:37:24,665 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 06:37:24,665 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 06:37:24,666 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 06:37:24,666 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 06:37:24,666 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 06:37:24,666 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 06:37:24,667 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 06:37:24,667 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 06:37:24,668 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 06:37:24,668 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 06:37:24,668 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 06:37:24,669 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 06:37:24,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:37:24,669 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 06:37:24,669 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 06:37:24,670 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 06:37:24,670 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 06:37:24,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 06:37:24,670 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 06:37:24,671 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 06:37:24,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 06:37:24,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 06:37:24,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 06:37:24,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 06:37:24,957 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 06:37:24,957 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 06:37:24,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-08-24 06:37:26,195 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 06:37:26,451 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 06:37:26,452 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-08-24 06:37:26,463 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06434ee4/d86e80be05d54c08b80f254ef3f6fcf4/FLAGc46c05702 [2023-08-24 06:37:26,473 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06434ee4/d86e80be05d54c08b80f254ef3f6fcf4 [2023-08-24 06:37:26,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 06:37:26,476 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 06:37:26,477 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 06:37:26,477 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 06:37:26,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 06:37:26,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:26,481 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b08f031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26, skipping insertion in model container [2023-08-24 06:37:26,481 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:26,520 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 06:37:26,767 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_42-trylock2_racefree.i[30176,30189] [2023-08-24 06:37:26,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:37:26,812 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 06:37:26,839 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:37:26,841 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:37:26,857 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_42-trylock2_racefree.i[30176,30189] [2023-08-24 06:37:26,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:37:26,925 INFO L206 MainTranslator]: Completed translation [2023-08-24 06:37:26,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26 WrapperNode [2023-08-24 06:37:26,925 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 06:37:26,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 06:37:26,926 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 06:37:26,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 06:37:26,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:26,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:26,990 INFO L138 Inliner]: procedures = 171, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 132 [2023-08-24 06:37:26,990 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 06:37:26,992 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 06:37:26,992 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 06:37:26,992 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 06:37:27,000 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:27,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:27,014 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:27,014 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:27,019 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:27,023 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:27,041 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:27,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:27,045 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 06:37:27,046 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 06:37:27,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 06:37:27,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 06:37:27,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (1/1) ... [2023-08-24 06:37:27,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:37:27,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:37:27,082 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 06:37:27,105 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 06:37:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 06:37:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 06:37:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 06:37:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 06:37:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 06:37:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 06:37:27,121 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 06:37:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 06:37:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-24 06:37:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 06:37:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 06:37:27,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 06:37:27,123 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 06:37:27,278 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 06:37:27,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 06:37:27,574 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 06:37:27,586 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 06:37:27,586 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-24 06:37:27,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:37:27 BoogieIcfgContainer [2023-08-24 06:37:27,588 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 06:37:27,590 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 06:37:27,590 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 06:37:27,593 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 06:37:27,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 06:37:26" (1/3) ... [2023-08-24 06:37:27,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170c7fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:37:27, skipping insertion in model container [2023-08-24 06:37:27,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:37:26" (2/3) ... [2023-08-24 06:37:27,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170c7fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:37:27, skipping insertion in model container [2023-08-24 06:37:27,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:37:27" (3/3) ... [2023-08-24 06:37:27,595 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2023-08-24 06:37:27,611 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 06:37:27,611 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-24 06:37:27,611 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 06:37:27,704 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 06:37:27,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 186 transitions, 380 flow [2023-08-24 06:37:27,817 INFO L124 PetriNetUnfolderBase]: 45/273 cut-off events. [2023-08-24 06:37:27,817 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 06:37:27,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 273 events. 45/273 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1007 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 145. Up to 6 conditions per place. [2023-08-24 06:37:27,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 186 transitions, 380 flow [2023-08-24 06:37:27,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 181 transitions, 367 flow [2023-08-24 06:37:27,846 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:37:27,854 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 181 transitions, 367 flow [2023-08-24 06:37:27,856 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 181 transitions, 367 flow [2023-08-24 06:37:27,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 181 transitions, 367 flow [2023-08-24 06:37:27,896 INFO L124 PetriNetUnfolderBase]: 44/268 cut-off events. [2023-08-24 06:37:27,897 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:37:27,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 268 events. 44/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 992 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 145. Up to 6 conditions per place. [2023-08-24 06:37:27,903 INFO L119 LiptonReduction]: Number of co-enabled transitions 9858 [2023-08-24 06:37:31,280 INFO L134 LiptonReduction]: Checked pairs total: 21217 [2023-08-24 06:37:31,280 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-24 06:37:31,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:37:31,298 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:37:31,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:37:31,303 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:37:31,304 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2023-08-24 06:37:31,304 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:37:31,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:37:31,304 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 06:37:31,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:37:31,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:37:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash -328723787, now seen corresponding path program 1 times [2023-08-24 06:37:31,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:37:31,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853128087] [2023-08-24 06:37:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:37:31,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:37:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:31,419 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:37:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:31,459 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:37:31,461 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:37:31,462 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:37:31,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 06:37:31,464 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:37:31,466 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:37:31,467 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:37:31,467 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 06:37:31,488 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 06:37:31,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 241 transitions, 500 flow [2023-08-24 06:37:31,576 INFO L124 PetriNetUnfolderBase]: 76/440 cut-off events. [2023-08-24 06:37:31,576 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 06:37:31,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 440 events. 76/440 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1869 event pairs, 0 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 275. Up to 9 conditions per place. [2023-08-24 06:37:31,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 241 transitions, 500 flow [2023-08-24 06:37:31,586 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 241 transitions, 500 flow [2023-08-24 06:37:31,586 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:37:31,586 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 241 transitions, 500 flow [2023-08-24 06:37:31,586 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 241 transitions, 500 flow [2023-08-24 06:37:31,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 241 transitions, 500 flow [2023-08-24 06:37:31,634 INFO L124 PetriNetUnfolderBase]: 76/440 cut-off events. [2023-08-24 06:37:31,635 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 06:37:31,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 440 events. 76/440 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1869 event pairs, 0 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 275. Up to 9 conditions per place. [2023-08-24 06:37:31,654 INFO L119 LiptonReduction]: Number of co-enabled transitions 26500 [2023-08-24 06:37:34,969 INFO L134 LiptonReduction]: Checked pairs total: 80054 [2023-08-24 06:37:34,970 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-24 06:37:34,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:37:34,973 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:37:34,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:37:34,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:37:34,981 INFO L124 PetriNetUnfolderBase]: 28/111 cut-off events. [2023-08-24 06:37:34,981 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 06:37:34,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:37:34,981 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 06:37:34,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:37:34,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:37:34,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1887219070, now seen corresponding path program 1 times [2023-08-24 06:37:34,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:37:34,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273237652] [2023-08-24 06:37:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:37:34,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:37:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:35,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:37:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:35,084 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:37:35,085 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:37:35,085 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:37:35,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 06:37:35,085 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:37:35,086 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:37:35,086 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:37:35,086 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 06:37:35,125 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 06:37:35,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 296 transitions, 622 flow [2023-08-24 06:37:35,225 INFO L124 PetriNetUnfolderBase]: 112/640 cut-off events. [2023-08-24 06:37:35,225 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 06:37:35,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 640 events. 112/640 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2836 event pairs, 1 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 448. Up to 16 conditions per place. [2023-08-24 06:37:35,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 296 transitions, 622 flow [2023-08-24 06:37:35,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 296 transitions, 622 flow [2023-08-24 06:37:35,236 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:37:35,236 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 296 transitions, 622 flow [2023-08-24 06:37:35,237 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 296 transitions, 622 flow [2023-08-24 06:37:35,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 296 transitions, 622 flow [2023-08-24 06:37:35,309 INFO L124 PetriNetUnfolderBase]: 112/640 cut-off events. [2023-08-24 06:37:35,309 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 06:37:35,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 640 events. 112/640 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2836 event pairs, 1 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 448. Up to 16 conditions per place. [2023-08-24 06:37:35,338 INFO L119 LiptonReduction]: Number of co-enabled transitions 48654 [2023-08-24 06:37:38,756 INFO L134 LiptonReduction]: Checked pairs total: 143099 [2023-08-24 06:37:38,756 INFO L136 LiptonReduction]: Total number of compositions: 187 [2023-08-24 06:37:38,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:37:38,762 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:37:38,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:37:38,777 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:37:38,778 INFO L124 PetriNetUnfolderBase]: 55/195 cut-off events. [2023-08-24 06:37:38,778 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-24 06:37:38,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:37:38,779 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 06:37:38,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:37:38,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:37:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash -399370325, now seen corresponding path program 1 times [2023-08-24 06:37:38,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:37:38,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981031193] [2023-08-24 06:37:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:37:38,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:37:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:38,820 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:37:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:38,837 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:37:38,837 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:37:38,837 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:37:38,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 06:37:38,837 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:37:38,838 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:37:38,838 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:37:38,838 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 06:37:38,859 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 06:37:38,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 351 transitions, 746 flow [2023-08-24 06:37:38,983 INFO L124 PetriNetUnfolderBase]: 160/908 cut-off events. [2023-08-24 06:37:38,987 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 06:37:39,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 908 events. 160/908 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4291 event pairs, 6 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 660. Up to 32 conditions per place. [2023-08-24 06:37:39,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 292 places, 351 transitions, 746 flow [2023-08-24 06:37:39,013 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 351 transitions, 746 flow [2023-08-24 06:37:39,014 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:37:39,014 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 292 places, 351 transitions, 746 flow [2023-08-24 06:37:39,014 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 292 places, 351 transitions, 746 flow [2023-08-24 06:37:39,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 351 transitions, 746 flow [2023-08-24 06:37:39,166 INFO L124 PetriNetUnfolderBase]: 160/908 cut-off events. [2023-08-24 06:37:39,166 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 06:37:39,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 908 events. 160/908 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4291 event pairs, 6 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 660. Up to 32 conditions per place. [2023-08-24 06:37:39,204 INFO L119 LiptonReduction]: Number of co-enabled transitions 76744 [2023-08-24 06:37:42,490 INFO L134 LiptonReduction]: Checked pairs total: 232155 [2023-08-24 06:37:42,490 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-08-24 06:37:42,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:37:42,492 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:37:42,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:37:42,512 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:37:42,512 INFO L124 PetriNetUnfolderBase]: 74/265 cut-off events. [2023-08-24 06:37:42,512 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 06:37:42,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:37:42,512 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 06:37:42,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:37:42,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:37:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash 791793445, now seen corresponding path program 1 times [2023-08-24 06:37:42,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:37:42,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901527905] [2023-08-24 06:37:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:37:42,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:37:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:42,533 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:37:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:42,551 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:37:42,551 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:37:42,551 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:37:42,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 06:37:42,551 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:37:42,552 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:37:42,552 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:37:42,552 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 06:37:42,576 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 06:37:42,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 406 transitions, 872 flow [2023-08-24 06:37:42,791 INFO L124 PetriNetUnfolderBase]: 236/1316 cut-off events. [2023-08-24 06:37:42,792 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 06:37:42,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 1316 events. 236/1316 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 6779 event pairs, 23 based on Foata normal form. 0/1072 useless extension candidates. Maximal degree in co-relation 953. Up to 80 conditions per place. [2023-08-24 06:37:42,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 406 transitions, 872 flow [2023-08-24 06:37:42,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 336 places, 406 transitions, 872 flow [2023-08-24 06:37:42,836 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:37:42,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 336 places, 406 transitions, 872 flow [2023-08-24 06:37:42,836 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 336 places, 406 transitions, 872 flow [2023-08-24 06:37:42,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 406 transitions, 872 flow [2023-08-24 06:37:43,079 INFO L124 PetriNetUnfolderBase]: 236/1316 cut-off events. [2023-08-24 06:37:43,080 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 06:37:43,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 1316 events. 236/1316 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 6779 event pairs, 23 based on Foata normal form. 0/1072 useless extension candidates. Maximal degree in co-relation 953. Up to 80 conditions per place. [2023-08-24 06:37:43,156 INFO L119 LiptonReduction]: Number of co-enabled transitions 110770 [2023-08-24 06:37:46,540 INFO L134 LiptonReduction]: Checked pairs total: 342306 [2023-08-24 06:37:46,540 INFO L136 LiptonReduction]: Total number of compositions: 245 [2023-08-24 06:37:46,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:37:46,543 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:37:46,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:37:46,571 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:37:46,572 INFO L124 PetriNetUnfolderBase]: 98/343 cut-off events. [2023-08-24 06:37:46,572 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-24 06:37:46,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:37:46,572 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:37:46,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:37:46,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:37:46,573 INFO L85 PathProgramCache]: Analyzing trace with hash -900093038, now seen corresponding path program 1 times [2023-08-24 06:37:46,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:37:46,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131395955] [2023-08-24 06:37:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:37:46,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:37:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:46,615 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:37:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:46,648 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:37:46,649 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:37:46,649 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:37:46,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 06:37:46,649 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:37:46,650 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:37:46,650 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:37:46,650 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-24 06:37:46,687 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-24 06:37:46,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 380 places, 461 transitions, 1000 flow [2023-08-24 06:37:47,145 INFO L124 PetriNetUnfolderBase]: 376/2012 cut-off events. [2023-08-24 06:37:47,146 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-24 06:37:47,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2244 conditions, 2012 events. 376/2012 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11690 event pairs, 72 based on Foata normal form. 0/1672 useless extension candidates. Maximal degree in co-relation 1415. Up to 192 conditions per place. [2023-08-24 06:37:47,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 380 places, 461 transitions, 1000 flow [2023-08-24 06:37:47,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 380 places, 461 transitions, 1000 flow [2023-08-24 06:37:47,194 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:37:47,194 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 380 places, 461 transitions, 1000 flow [2023-08-24 06:37:47,194 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 380 places, 461 transitions, 1000 flow [2023-08-24 06:37:47,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 380 places, 461 transitions, 1000 flow [2023-08-24 06:37:47,556 INFO L124 PetriNetUnfolderBase]: 376/2012 cut-off events. [2023-08-24 06:37:47,557 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-24 06:37:47,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2244 conditions, 2012 events. 376/2012 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11690 event pairs, 72 based on Foata normal form. 0/1672 useless extension candidates. Maximal degree in co-relation 1415. Up to 192 conditions per place. [2023-08-24 06:37:47,735 INFO L119 LiptonReduction]: Number of co-enabled transitions 150732 [2023-08-24 06:37:51,237 INFO L134 LiptonReduction]: Checked pairs total: 536781 [2023-08-24 06:37:51,237 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-08-24 06:37:51,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:37:51,239 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:37:51,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:37:51,279 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:37:51,280 INFO L124 PetriNetUnfolderBase]: 122/427 cut-off events. [2023-08-24 06:37:51,280 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-24 06:37:51,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:37:51,280 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:37:51,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:37:51,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:37:51,281 INFO L85 PathProgramCache]: Analyzing trace with hash -588736858, now seen corresponding path program 1 times [2023-08-24 06:37:51,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:37:51,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134382283] [2023-08-24 06:37:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:37:51,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:37:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:51,317 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:37:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:51,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:37:51,357 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:37:51,357 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:37:51,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 06:37:51,357 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:37:51,357 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:37:51,358 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:37:51,358 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-24 06:37:51,393 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-24 06:37:51,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 424 places, 516 transitions, 1130 flow [2023-08-24 06:37:52,232 INFO L124 PetriNetUnfolderBase]: 660/3300 cut-off events. [2023-08-24 06:37:52,232 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-24 06:37:52,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3798 conditions, 3300 events. 660/3300 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 22153 event pairs, 201 based on Foata normal form. 0/2800 useless extension candidates. Maximal degree in co-relation 2230. Up to 448 conditions per place. [2023-08-24 06:37:52,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 424 places, 516 transitions, 1130 flow [2023-08-24 06:37:52,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 424 places, 516 transitions, 1130 flow [2023-08-24 06:37:52,311 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:37:52,311 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 424 places, 516 transitions, 1130 flow [2023-08-24 06:37:52,312 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 424 places, 516 transitions, 1130 flow [2023-08-24 06:37:52,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 424 places, 516 transitions, 1130 flow [2023-08-24 06:37:53,031 INFO L124 PetriNetUnfolderBase]: 660/3300 cut-off events. [2023-08-24 06:37:53,032 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-24 06:37:53,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3798 conditions, 3300 events. 660/3300 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 22153 event pairs, 201 based on Foata normal form. 0/2800 useless extension candidates. Maximal degree in co-relation 2230. Up to 448 conditions per place. [2023-08-24 06:37:53,273 INFO L119 LiptonReduction]: Number of co-enabled transitions 196630 [2023-08-24 06:37:57,148 INFO L134 LiptonReduction]: Checked pairs total: 625345 [2023-08-24 06:37:57,148 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-08-24 06:37:57,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:37:57,150 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:37:57,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:37:57,204 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:37:57,204 INFO L124 PetriNetUnfolderBase]: 159/545 cut-off events. [2023-08-24 06:37:57,204 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-08-24 06:37:57,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:37:57,205 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:37:57,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:37:57,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:37:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1040091904, now seen corresponding path program 1 times [2023-08-24 06:37:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:37:57,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884926579] [2023-08-24 06:37:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:37:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:37:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:57,237 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:37:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:37:57,266 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:37:57,266 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:37:57,267 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:37:57,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 06:37:57,267 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:37:57,267 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:37:57,268 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:37:57,268 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-24 06:37:57,304 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-24 06:37:57,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 468 places, 571 transitions, 1262 flow [2023-08-24 06:37:58,938 INFO L124 PetriNetUnfolderBase]: 1264/5804 cut-off events. [2023-08-24 06:37:58,940 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-24 06:37:59,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 5804 events. 1264/5804 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 45582 event pairs, 522 based on Foata normal form. 0/5016 useless extension candidates. Maximal degree in co-relation 3782. Up to 1024 conditions per place. [2023-08-24 06:37:59,158 INFO L82 GeneralOperation]: Start removeDead. Operand has 468 places, 571 transitions, 1262 flow [2023-08-24 06:37:59,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 468 places, 571 transitions, 1262 flow [2023-08-24 06:37:59,216 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:37:59,216 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 468 places, 571 transitions, 1262 flow [2023-08-24 06:37:59,217 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 468 places, 571 transitions, 1262 flow [2023-08-24 06:37:59,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 468 places, 571 transitions, 1262 flow [2023-08-24 06:38:00,452 INFO L124 PetriNetUnfolderBase]: 1264/5804 cut-off events. [2023-08-24 06:38:00,453 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-24 06:38:00,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 5804 events. 1264/5804 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 45582 event pairs, 522 based on Foata normal form. 0/5016 useless extension candidates. Maximal degree in co-relation 3782. Up to 1024 conditions per place. [2023-08-24 06:38:00,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 248464 [2023-08-24 06:38:05,125 INFO L134 LiptonReduction]: Checked pairs total: 922306 [2023-08-24 06:38:05,125 INFO L136 LiptonReduction]: Total number of compositions: 320 [2023-08-24 06:38:05,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:38:05,126 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:38:05,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:38:05,184 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:38:05,185 INFO L124 PetriNetUnfolderBase]: 191/664 cut-off events. [2023-08-24 06:38:05,185 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-08-24 06:38:05,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:38:05,185 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:38:05,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:38:05,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:38:05,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1302409074, now seen corresponding path program 1 times [2023-08-24 06:38:05,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:38:05,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577563479] [2023-08-24 06:38:05,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:38:05,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:38:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:38:05,215 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:38:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:38:05,246 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:38:05,247 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:38:05,247 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:38:05,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 06:38:05,247 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:38:05,249 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:38:05,249 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:38:05,249 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-24 06:38:05,289 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-24 06:38:05,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 512 places, 626 transitions, 1396 flow [2023-08-24 06:38:08,271 INFO L124 PetriNetUnfolderBase]: 2572/10804 cut-off events. [2023-08-24 06:38:08,271 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-24 06:38:08,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13181 conditions, 10804 events. 2572/10804 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 98939 event pairs, 1291 based on Foata normal form. 0/9472 useless extension candidates. Maximal degree in co-relation 6871. Up to 2304 conditions per place. [2023-08-24 06:38:08,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 512 places, 626 transitions, 1396 flow [2023-08-24 06:38:08,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 512 places, 626 transitions, 1396 flow [2023-08-24 06:38:08,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:38:08,691 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 512 places, 626 transitions, 1396 flow [2023-08-24 06:38:08,691 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 512 places, 626 transitions, 1396 flow [2023-08-24 06:38:08,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 512 places, 626 transitions, 1396 flow [2023-08-24 06:38:11,544 INFO L124 PetriNetUnfolderBase]: 2572/10804 cut-off events. [2023-08-24 06:38:11,544 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-24 06:38:11,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13181 conditions, 10804 events. 2572/10804 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 98939 event pairs, 1291 based on Foata normal form. 0/9472 useless extension candidates. Maximal degree in co-relation 6871. Up to 2304 conditions per place. [2023-08-24 06:38:12,377 INFO L119 LiptonReduction]: Number of co-enabled transitions 306234 [2023-08-24 06:38:16,807 INFO L134 LiptonReduction]: Checked pairs total: 1141972 [2023-08-24 06:38:16,807 INFO L136 LiptonReduction]: Total number of compositions: 346 [2023-08-24 06:38:16,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:38:16,809 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:38:16,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:38:16,890 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:38:16,890 INFO L124 PetriNetUnfolderBase]: 227/792 cut-off events. [2023-08-24 06:38:16,890 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2023-08-24 06:38:16,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:38:16,891 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:38:16,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:38:16,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:38:16,891 INFO L85 PathProgramCache]: Analyzing trace with hash 597161156, now seen corresponding path program 1 times [2023-08-24 06:38:16,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:38:16,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266230690] [2023-08-24 06:38:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:38:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:38:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:38:16,922 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:38:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:38:16,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:38:16,943 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:38:16,944 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:38:16,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 06:38:16,944 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:38:16,947 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:38:16,948 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:38:16,950 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-24 06:38:16,990 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-24 06:38:16,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 556 places, 681 transitions, 1532 flow [2023-08-24 06:38:23,332 INFO L124 PetriNetUnfolderBase]: 5416/20924 cut-off events. [2023-08-24 06:38:23,332 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-24 06:38:23,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26130 conditions, 20924 events. 5416/20924 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 219340 event pairs, 3084 based on Foata normal form. 0/18536 useless extension candidates. Maximal degree in co-relation 13161. Up to 5120 conditions per place. [2023-08-24 06:38:23,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 556 places, 681 transitions, 1532 flow [2023-08-24 06:38:24,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 556 places, 681 transitions, 1532 flow [2023-08-24 06:38:24,056 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:38:24,056 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 556 places, 681 transitions, 1532 flow [2023-08-24 06:38:24,056 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 556 places, 681 transitions, 1532 flow [2023-08-24 06:38:24,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 556 places, 681 transitions, 1532 flow [2023-08-24 06:38:30,457 INFO L124 PetriNetUnfolderBase]: 5416/20924 cut-off events. [2023-08-24 06:38:30,458 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-24 06:38:30,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26130 conditions, 20924 events. 5416/20924 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 219340 event pairs, 3084 based on Foata normal form. 0/18536 useless extension candidates. Maximal degree in co-relation 13161. Up to 5120 conditions per place. [2023-08-24 06:38:32,206 INFO L119 LiptonReduction]: Number of co-enabled transitions 369940 [2023-08-24 06:38:36,668 INFO L134 LiptonReduction]: Checked pairs total: 1387717 [2023-08-24 06:38:36,668 INFO L136 LiptonReduction]: Total number of compositions: 372 [2023-08-24 06:38:36,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:38:36,670 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:38:36,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:38:36,766 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:38:36,766 INFO L124 PetriNetUnfolderBase]: 270/934 cut-off events. [2023-08-24 06:38:36,766 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2023-08-24 06:38:36,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:38:36,767 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:38:36,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:38:36,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:38:36,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1025768541, now seen corresponding path program 1 times [2023-08-24 06:38:36,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:38:36,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378739997] [2023-08-24 06:38:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:38:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:38:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:38:36,798 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:38:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:38:36,829 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:38:36,829 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:38:36,829 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:38:36,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 06:38:36,829 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:38:36,830 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:38:36,830 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:38:36,830 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-24 06:38:36,884 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-24 06:38:36,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 600 places, 736 transitions, 1670 flow [2023-08-24 06:38:50,831 INFO L124 PetriNetUnfolderBase]: 11588/41540 cut-off events. [2023-08-24 06:38:50,831 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-24 06:38:52,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52904 conditions, 41540 events. 11588/41540 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 483523 event pairs, 7181 based on Foata normal form. 0/37072 useless extension candidates. Maximal degree in co-relation 26108. Up to 11264 conditions per place. [2023-08-24 06:38:52,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 600 places, 736 transitions, 1670 flow [2023-08-24 06:38:53,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 600 places, 736 transitions, 1670 flow [2023-08-24 06:38:53,119 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:38:53,119 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 600 places, 736 transitions, 1670 flow [2023-08-24 06:38:53,119 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 600 places, 736 transitions, 1670 flow [2023-08-24 06:38:53,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 600 places, 736 transitions, 1670 flow [2023-08-24 06:39:07,137 INFO L124 PetriNetUnfolderBase]: 11588/41540 cut-off events. [2023-08-24 06:39:07,137 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-24 06:39:08,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52904 conditions, 41540 events. 11588/41540 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 483523 event pairs, 7181 based on Foata normal form. 0/37072 useless extension candidates. Maximal degree in co-relation 26108. Up to 11264 conditions per place. [2023-08-24 06:39:11,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 439582 [2023-08-24 06:39:16,117 INFO L134 LiptonReduction]: Checked pairs total: 1473925 [2023-08-24 06:39:16,118 INFO L136 LiptonReduction]: Total number of compositions: 398 [2023-08-24 06:39:16,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:39:16,119 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:39:16,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:39:16,286 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:39:16,286 INFO L124 PetriNetUnfolderBase]: 323/1106 cut-off events. [2023-08-24 06:39:16,286 INFO L125 PetriNetUnfolderBase]: For 436/436 co-relation queries the response was YES. [2023-08-24 06:39:16,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:39:16,287 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:39:16,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:39:16,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:39:16,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1106915388, now seen corresponding path program 1 times [2023-08-24 06:39:16,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:39:16,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590213320] [2023-08-24 06:39:16,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:39:16,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:39:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:39:16,312 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:39:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:39:16,334 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:39:16,334 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:39:16,334 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:39:16,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 06:39:16,335 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:39:16,335 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:39:16,335 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:39:16,335 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-24 06:39:16,383 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-24 06:39:16,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 644 places, 791 transitions, 1810 flow [2023-08-24 06:39:50,040 INFO L124 PetriNetUnfolderBase]: 24928/83660 cut-off events. [2023-08-24 06:39:50,040 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-24 06:39:54,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108351 conditions, 83660 events. 24928/83660 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1327. Compared 1059838 event pairs, 16398 based on Foata normal form. 0/75064 useless extension candidates. Maximal degree in co-relation 52880. Up to 24576 conditions per place. [2023-08-24 06:39:54,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 644 places, 791 transitions, 1810 flow [2023-08-24 06:39:57,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 644 places, 791 transitions, 1810 flow [2023-08-24 06:39:57,444 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:39:57,444 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 644 places, 791 transitions, 1810 flow [2023-08-24 06:39:57,445 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 644 places, 791 transitions, 1810 flow [2023-08-24 06:39:57,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 644 places, 791 transitions, 1810 flow [2023-08-24 06:40:28,154 INFO L124 PetriNetUnfolderBase]: 24928/83660 cut-off events. [2023-08-24 06:40:28,154 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-24 06:40:32,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108351 conditions, 83660 events. 24928/83660 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1327. Compared 1059838 event pairs, 16398 based on Foata normal form. 0/75064 useless extension candidates. Maximal degree in co-relation 52880. Up to 24576 conditions per place. [2023-08-24 06:40:43,448 INFO L119 LiptonReduction]: Number of co-enabled transitions 515160 [2023-08-24 06:40:48,305 INFO L134 LiptonReduction]: Checked pairs total: 1745139 [2023-08-24 06:40:48,305 INFO L136 LiptonReduction]: Total number of compositions: 426 [2023-08-24 06:40:48,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:40:48,307 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;@5050c57f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:40:48,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:40:48,482 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:40:48,482 INFO L124 PetriNetUnfolderBase]: 418/1390 cut-off events. [2023-08-24 06:40:48,482 INFO L125 PetriNetUnfolderBase]: For 613/613 co-relation queries the response was YES. [2023-08-24 06:40:48,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:40:48,482 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 06:40:48,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:40:48,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:40:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1020336530, now seen corresponding path program 1 times [2023-08-24 06:40:48,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:40:48,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570521747] [2023-08-24 06:40:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:40:48,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:40:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:40:48,505 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:40:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:40:48,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:40:48,527 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:40:48,527 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:40:48,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 06:40:48,527 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 06:40:48,528 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:40:48,528 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:40:48,528 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-24 06:40:48,573 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-24 06:40:48,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 688 places, 846 transitions, 1952 flow [2023-08-24 06:42:02,371 INFO L124 PetriNetUnfolderBase]: 53628/169812 cut-off events. [2023-08-24 06:42:02,371 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-24 06:42:18,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223191 conditions, 169812 events. 53628/169812 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2617. Compared 2348201 event pairs, 36879 based on Foata normal form. 0/152992 useless extension candidates. Maximal degree in co-relation 108325. Up to 53248 conditions per place. [2023-08-24 06:42:18,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 688 places, 846 transitions, 1952 flow [2023-08-24 06:42:25,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 688 places, 846 transitions, 1952 flow [2023-08-24 06:42:25,960 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:42:25,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 688 places, 846 transitions, 1952 flow [2023-08-24 06:42:25,961 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 688 places, 846 transitions, 1952 flow [2023-08-24 06:42:25,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 688 places, 846 transitions, 1952 flow