/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 05:15:34,637 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 05:15:34,725 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 [2023-08-27 05:15:34,730 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 05:15:34,731 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 05:15:34,761 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 05:15:34,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 05:15:34,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 05:15:34,763 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 05:15:34,766 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 05:15:34,766 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 05:15:34,767 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 05:15:34,767 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 05:15:34,768 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 05:15:34,768 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 05:15:34,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 05:15:34,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 05:15:34,769 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 05:15:34,769 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 05:15:34,769 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 05:15:34,770 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 05:15:34,770 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 05:15:34,771 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 05:15:34,771 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 05:15:34,771 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 05:15:34,772 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 05:15:34,772 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 05:15:34,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:15:34,772 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 05:15:34,772 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 05:15:34,773 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 05:15:34,774 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 05:15:34,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 05:15:34,774 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 05:15:34,774 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 05:15:34,774 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 05:15:35,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 05:15:35,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 05:15:35,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 05:15:35,079 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 05:15:35,080 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 05:15:35,081 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-27 05:15:36,335 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 05:15:36,580 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 05:15:36,581 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-27 05:15:36,594 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c67f4d8fb/45dfd37577ba4cb2980e4691c6eeba63/FLAGf1ce2fd19 [2023-08-27 05:15:36,604 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c67f4d8fb/45dfd37577ba4cb2980e4691c6eeba63 [2023-08-27 05:15:36,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 05:15:36,607 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 05:15:36,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 05:15:36,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 05:15:36,610 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 05:15:36,611 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:15:36" (1/1) ... [2023-08-27 05:15:36,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@766fe76e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:36, skipping insertion in model container [2023-08-27 05:15:36,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:15:36" (1/1) ... [2023-08-27 05:15:36,651 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 05:15:36,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:15:36,966 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 05:15:36,994 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:15:36,996 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:15:37,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:15:37,066 INFO L206 MainTranslator]: Completed translation [2023-08-27 05:15:37,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37 WrapperNode [2023-08-27 05:15:37,066 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 05:15:37,067 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 05:15:37,067 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 05:15:37,068 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 05:15:37,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (1/1) ... [2023-08-27 05:15:37,099 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (1/1) ... [2023-08-27 05:15:37,124 INFO L138 Inliner]: procedures = 171, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2023-08-27 05:15:37,125 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 05:15:37,126 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 05:15:37,126 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 05:15:37,126 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 05:15:37,133 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (1/1) ... [2023-08-27 05:15:37,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (1/1) ... [2023-08-27 05:15:37,148 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (1/1) ... [2023-08-27 05:15:37,148 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (1/1) ... [2023-08-27 05:15:37,153 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (1/1) ... [2023-08-27 05:15:37,156 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (1/1) ... [2023-08-27 05:15:37,157 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (1/1) ... [2023-08-27 05:15:37,158 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (1/1) ... [2023-08-27 05:15:37,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 05:15:37,161 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 05:15:37,161 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 05:15:37,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 05:15:37,162 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (1/1) ... [2023-08-27 05:15:37,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:15:37,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:15:37,194 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) [2023-08-27 05:15:37,207 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 [2023-08-27 05:15:37,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 05:15:37,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 05:15:37,230 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-27 05:15:37,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 05:15:37,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 05:15:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-27 05:15:37,231 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-27 05:15:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 05:15:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-27 05:15:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 05:15:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 05:15:37,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 05:15:37,233 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 05:15:37,388 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 05:15:37,390 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 05:15:37,597 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 05:15:37,605 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 05:15:37,605 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-27 05:15:37,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:15:37 BoogieIcfgContainer [2023-08-27 05:15:37,607 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 05:15:37,609 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 05:15:37,609 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 05:15:37,612 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 05:15:37,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:15:36" (1/3) ... [2023-08-27 05:15:37,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5978f29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:15:37, skipping insertion in model container [2023-08-27 05:15:37,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:37" (2/3) ... [2023-08-27 05:15:37,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5978f29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:15:37, skipping insertion in model container [2023-08-27 05:15:37,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:15:37" (3/3) ... [2023-08-27 05:15:37,614 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-08-27 05:15:37,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 05:15:37,629 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-27 05:15:37,629 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 05:15:37,680 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-27 05:15:37,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 125 transitions, 258 flow [2023-08-27 05:15:37,764 INFO L124 PetriNetUnfolderBase]: 23/168 cut-off events. [2023-08-27 05:15:37,764 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 05:15:37,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 168 events. 23/168 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 432 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-27 05:15:37,771 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 125 transitions, 258 flow [2023-08-27 05:15:37,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 116 transitions, 237 flow [2023-08-27 05:15:37,779 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:15:37,787 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 116 transitions, 237 flow [2023-08-27 05:15:37,789 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 116 transitions, 237 flow [2023-08-27 05:15:37,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 116 transitions, 237 flow [2023-08-27 05:15:37,821 INFO L124 PetriNetUnfolderBase]: 22/159 cut-off events. [2023-08-27 05:15:37,821 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:15:37,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 159 events. 22/159 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 413 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-27 05:15:37,825 INFO L119 LiptonReduction]: Number of co-enabled transitions 3816 [2023-08-27 05:15:40,423 INFO L134 LiptonReduction]: Checked pairs total: 5617 [2023-08-27 05:15:40,423 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-08-27 05:15:40,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:15:40,441 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;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:15:40,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:15:40,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:15:40,445 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-08-27 05:15:40,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:15:40,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:15:40,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-27 05:15:40,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:15:40,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:15:40,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1504301595, now seen corresponding path program 1 times [2023-08-27 05:15:40,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:15:40,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048344749] [2023-08-27 05:15:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:15:40,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:15:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:40,567 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:15:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:40,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:15:40,632 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:15:40,633 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:15:40,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 05:15:40,642 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:15:40,650 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:15:40,651 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:15:40,651 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-27 05:15:40,680 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 05:15:40,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 163 transitions, 344 flow [2023-08-27 05:15:40,726 INFO L124 PetriNetUnfolderBase]: 40/286 cut-off events. [2023-08-27 05:15:40,726 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:15:40,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 286 events. 40/286 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 891 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 170. Up to 9 conditions per place. [2023-08-27 05:15:40,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 163 transitions, 344 flow [2023-08-27 05:15:40,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 163 transitions, 344 flow [2023-08-27 05:15:40,731 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:15:40,731 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 163 transitions, 344 flow [2023-08-27 05:15:40,732 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 163 transitions, 344 flow [2023-08-27 05:15:40,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 163 transitions, 344 flow [2023-08-27 05:15:40,765 INFO L124 PetriNetUnfolderBase]: 40/286 cut-off events. [2023-08-27 05:15:40,766 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:15:40,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 286 events. 40/286 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 891 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 170. Up to 9 conditions per place. [2023-08-27 05:15:40,776 INFO L119 LiptonReduction]: Number of co-enabled transitions 11592 [2023-08-27 05:15:43,436 INFO L134 LiptonReduction]: Checked pairs total: 27140 [2023-08-27 05:15:43,436 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-27 05:15:43,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:15:43,440 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;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:15:43,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:15:43,448 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:15:43,448 INFO L124 PetriNetUnfolderBase]: 15/70 cut-off events. [2023-08-27 05:15:43,448 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 05:15:43,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:15:43,448 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-27 05:15:43,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:15:43,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:15:43,449 INFO L85 PathProgramCache]: Analyzing trace with hash 152074285, now seen corresponding path program 1 times [2023-08-27 05:15:43,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:15:43,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576702357] [2023-08-27 05:15:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:15:43,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:15:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:43,477 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:15:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:43,500 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:15:43,500 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:15:43,501 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:15:43,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 05:15:43,501 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:15:43,502 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:15:43,502 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:15:43,502 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-27 05:15:43,523 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 05:15:43,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 201 transitions, 432 flow [2023-08-27 05:15:43,569 INFO L124 PetriNetUnfolderBase]: 62/445 cut-off events. [2023-08-27 05:15:43,569 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:15:43,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 445 events. 62/445 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1556 event pairs, 1 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 294. Up to 16 conditions per place. [2023-08-27 05:15:43,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 201 transitions, 432 flow [2023-08-27 05:15:43,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 201 transitions, 432 flow [2023-08-27 05:15:43,578 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:15:43,578 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 201 transitions, 432 flow [2023-08-27 05:15:43,578 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 201 transitions, 432 flow [2023-08-27 05:15:43,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 201 transitions, 432 flow [2023-08-27 05:15:43,620 INFO L124 PetriNetUnfolderBase]: 62/445 cut-off events. [2023-08-27 05:15:43,620 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:15:43,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 445 events. 62/445 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1556 event pairs, 1 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 294. Up to 16 conditions per place. [2023-08-27 05:15:43,640 INFO L119 LiptonReduction]: Number of co-enabled transitions 21600 [2023-08-27 05:15:46,251 INFO L134 LiptonReduction]: Checked pairs total: 48584 [2023-08-27 05:15:46,252 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-27 05:15:46,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:15:46,257 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;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:15:46,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:15:46,270 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:15:46,270 INFO L124 PetriNetUnfolderBase]: 31/129 cut-off events. [2023-08-27 05:15:46,271 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-27 05:15:46,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:15:46,271 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-27 05:15:46,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:15:46,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:15:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash 420631564, now seen corresponding path program 1 times [2023-08-27 05:15:46,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:15:46,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689672814] [2023-08-27 05:15:46,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:15:46,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:15:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:46,307 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:15:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:46,333 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:15:46,334 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:15:46,334 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:15:46,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 05:15:46,334 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:15:46,335 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:15:46,335 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:15:46,335 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-27 05:15:46,371 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-27 05:15:46,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 239 transitions, 522 flow [2023-08-27 05:15:46,466 INFO L124 PetriNetUnfolderBase]: 96/688 cut-off events. [2023-08-27 05:15:46,466 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-27 05:15:46,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 688 events. 96/688 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2761 event pairs, 6 based on Foata normal form. 0/533 useless extension candidates. Maximal degree in co-relation 465. Up to 32 conditions per place. [2023-08-27 05:15:46,473 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 239 transitions, 522 flow [2023-08-27 05:15:46,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 239 transitions, 522 flow [2023-08-27 05:15:46,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:15:46,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 239 transitions, 522 flow [2023-08-27 05:15:46,479 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 239 transitions, 522 flow [2023-08-27 05:15:46,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 239 transitions, 522 flow [2023-08-27 05:15:46,584 INFO L124 PetriNetUnfolderBase]: 96/688 cut-off events. [2023-08-27 05:15:46,585 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-27 05:15:46,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 688 events. 96/688 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2761 event pairs, 6 based on Foata normal form. 0/533 useless extension candidates. Maximal degree in co-relation 465. Up to 32 conditions per place. [2023-08-27 05:15:46,610 INFO L119 LiptonReduction]: Number of co-enabled transitions 34416 [2023-08-27 05:15:49,409 INFO L134 LiptonReduction]: Checked pairs total: 104263 [2023-08-27 05:15:49,409 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-08-27 05:15:49,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:15:49,412 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;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:15:49,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:15:49,423 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:15:49,423 INFO L124 PetriNetUnfolderBase]: 43/182 cut-off events. [2023-08-27 05:15:49,423 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-27 05:15:49,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:15:49,423 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-27 05:15:49,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:15:49,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:15:49,424 INFO L85 PathProgramCache]: Analyzing trace with hash -719230812, now seen corresponding path program 1 times [2023-08-27 05:15:49,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:15:49,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557445015] [2023-08-27 05:15:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:15:49,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:15:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:49,475 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:15:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:49,509 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:15:49,509 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:15:49,509 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:15:49,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 05:15:49,510 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:15:49,510 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:15:49,510 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:15:49,510 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-27 05:15:49,539 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-27 05:15:49,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 277 transitions, 614 flow [2023-08-27 05:15:49,676 INFO L124 PetriNetUnfolderBase]: 158/1103 cut-off events. [2023-08-27 05:15:49,677 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-27 05:15:49,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 1103 events. 158/1103 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5219 event pairs, 23 based on Foata normal form. 0/863 useless extension candidates. Maximal degree in co-relation 733. Up to 80 conditions per place. [2023-08-27 05:15:49,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 277 transitions, 614 flow [2023-08-27 05:15:49,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 245 places, 277 transitions, 614 flow [2023-08-27 05:15:49,697 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:15:49,697 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 245 places, 277 transitions, 614 flow [2023-08-27 05:15:49,697 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 245 places, 277 transitions, 614 flow [2023-08-27 05:15:49,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 277 transitions, 614 flow [2023-08-27 05:15:49,836 INFO L124 PetriNetUnfolderBase]: 158/1103 cut-off events. [2023-08-27 05:15:49,837 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-27 05:15:49,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 1103 events. 158/1103 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5219 event pairs, 23 based on Foata normal form. 0/863 useless extension candidates. Maximal degree in co-relation 733. Up to 80 conditions per place. [2023-08-27 05:15:49,882 INFO L119 LiptonReduction]: Number of co-enabled transitions 50040 [2023-08-27 05:15:52,781 INFO L134 LiptonReduction]: Checked pairs total: 139072 [2023-08-27 05:15:52,781 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-27 05:15:52,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:15:52,783 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:15:52,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:15:52,799 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:15:52,800 INFO L124 PetriNetUnfolderBase]: 47/226 cut-off events. [2023-08-27 05:15:52,800 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-08-27 05:15:52,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:15:52,800 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:15:52,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:15:52,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:15:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1317899280, now seen corresponding path program 1 times [2023-08-27 05:15:52,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:15:52,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666840167] [2023-08-27 05:15:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:15:52,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:15:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:52,831 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:15:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:52,863 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:15:52,863 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:15:52,864 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:15:52,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 05:15:52,864 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:15:52,864 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:15:52,865 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:15:52,865 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-27 05:15:52,886 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-27 05:15:52,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 315 transitions, 708 flow [2023-08-27 05:15:53,205 INFO L124 PetriNetUnfolderBase]: 284/1870 cut-off events. [2023-08-27 05:15:53,205 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-27 05:15:53,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 1870 events. 284/1870 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 10887 event pairs, 72 based on Foata normal form. 0/1481 useless extension candidates. Maximal degree in co-relation 1202. Up to 192 conditions per place. [2023-08-27 05:15:53,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 315 transitions, 708 flow [2023-08-27 05:15:53,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 315 transitions, 708 flow [2023-08-27 05:15:53,238 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:15:53,238 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 315 transitions, 708 flow [2023-08-27 05:15:53,238 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 315 transitions, 708 flow [2023-08-27 05:15:53,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 315 transitions, 708 flow [2023-08-27 05:15:53,509 INFO L124 PetriNetUnfolderBase]: 284/1870 cut-off events. [2023-08-27 05:15:53,509 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-27 05:15:53,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 1870 events. 284/1870 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 10887 event pairs, 72 based on Foata normal form. 0/1481 useless extension candidates. Maximal degree in co-relation 1202. Up to 192 conditions per place. [2023-08-27 05:15:53,613 INFO L119 LiptonReduction]: Number of co-enabled transitions 68472 [2023-08-27 05:15:56,706 INFO L134 LiptonReduction]: Checked pairs total: 193840 [2023-08-27 05:15:56,707 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-08-27 05:15:56,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:15:56,710 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:15:56,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:15:56,731 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:15:56,731 INFO L124 PetriNetUnfolderBase]: 59/290 cut-off events. [2023-08-27 05:15:56,731 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-08-27 05:15:56,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:15:56,732 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:15:56,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:15:56,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:15:56,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2088051098, now seen corresponding path program 1 times [2023-08-27 05:15:56,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:15:56,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213824427] [2023-08-27 05:15:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:15:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:15:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:56,776 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:15:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:15:56,815 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:15:56,815 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:15:56,816 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:15:56,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 05:15:56,816 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:15:56,816 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:15:56,817 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:15:56,817 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-27 05:15:56,850 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-27 05:15:56,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 311 places, 353 transitions, 804 flow [2023-08-27 05:15:57,362 INFO L124 PetriNetUnfolderBase]: 554/3357 cut-off events. [2023-08-27 05:15:57,362 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-27 05:15:57,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3855 conditions, 3357 events. 554/3357 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 23760 event pairs, 201 based on Foata normal form. 0/2691 useless extension candidates. Maximal degree in co-relation 2088. Up to 448 conditions per place. [2023-08-27 05:15:57,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 353 transitions, 804 flow [2023-08-27 05:15:57,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 311 places, 353 transitions, 804 flow [2023-08-27 05:15:57,431 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:15:57,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 311 places, 353 transitions, 804 flow [2023-08-27 05:15:57,432 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 311 places, 353 transitions, 804 flow [2023-08-27 05:15:57,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 311 places, 353 transitions, 804 flow [2023-08-27 05:15:58,011 INFO L124 PetriNetUnfolderBase]: 554/3357 cut-off events. [2023-08-27 05:15:58,012 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-27 05:15:58,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3855 conditions, 3357 events. 554/3357 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 23760 event pairs, 201 based on Foata normal form. 0/2691 useless extension candidates. Maximal degree in co-relation 2088. Up to 448 conditions per place. [2023-08-27 05:15:58,203 INFO L119 LiptonReduction]: Number of co-enabled transitions 89712 [2023-08-27 05:16:01,522 INFO L134 LiptonReduction]: Checked pairs total: 261471 [2023-08-27 05:16:01,522 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-08-27 05:16:01,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:16:01,524 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;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:16:01,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:16:01,553 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:16:01,553 INFO L124 PetriNetUnfolderBase]: 82/387 cut-off events. [2023-08-27 05:16:01,553 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-08-27 05:16:01,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:16:01,553 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:16:01,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:16:01,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:16:01,554 INFO L85 PathProgramCache]: Analyzing trace with hash -224978018, now seen corresponding path program 1 times [2023-08-27 05:16:01,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:16:01,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989356548] [2023-08-27 05:16:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:16:01,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:16:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:16:01,575 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:16:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:16:01,592 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:16:01,593 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:16:01,593 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:16:01,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 05:16:01,593 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:16:01,594 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:16:01,594 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:16:01,594 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-27 05:16:01,623 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-27 05:16:01,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 391 transitions, 902 flow [2023-08-27 05:16:02,884 INFO L124 PetriNetUnfolderBase]: 1144/6316 cut-off events. [2023-08-27 05:16:02,885 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-27 05:16:02,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7401 conditions, 6316 events. 1144/6316 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 53224 event pairs, 522 based on Foata normal form. 0/5117 useless extension candidates. Maximal degree in co-relation 3839. Up to 1024 conditions per place. [2023-08-27 05:16:02,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 391 transitions, 902 flow [2023-08-27 05:16:03,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 391 transitions, 902 flow [2023-08-27 05:16:03,025 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:16:03,025 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 344 places, 391 transitions, 902 flow [2023-08-27 05:16:03,026 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 344 places, 391 transitions, 902 flow [2023-08-27 05:16:03,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 391 transitions, 902 flow [2023-08-27 05:16:04,262 INFO L124 PetriNetUnfolderBase]: 1144/6316 cut-off events. [2023-08-27 05:16:04,262 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-27 05:16:04,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7401 conditions, 6316 events. 1144/6316 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 53224 event pairs, 522 based on Foata normal form. 0/5117 useless extension candidates. Maximal degree in co-relation 3839. Up to 1024 conditions per place. [2023-08-27 05:16:04,512 INFO L119 LiptonReduction]: Number of co-enabled transitions 113760 [2023-08-27 05:16:08,061 INFO L134 LiptonReduction]: Checked pairs total: 336848 [2023-08-27 05:16:08,061 INFO L136 LiptonReduction]: Total number of compositions: 276 [2023-08-27 05:16:08,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:16:08,063 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;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:16:08,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:16:08,116 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:16:08,116 INFO L124 PetriNetUnfolderBase]: 108/507 cut-off events. [2023-08-27 05:16:08,116 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-27 05:16:08,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:16:08,117 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:16:08,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:16:08,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:16:08,117 INFO L85 PathProgramCache]: Analyzing trace with hash -947528619, now seen corresponding path program 1 times [2023-08-27 05:16:08,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:16:08,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880268091] [2023-08-27 05:16:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:16:08,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:16:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:16:08,138 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:16:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:16:08,158 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:16:08,158 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:16:08,158 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:16:08,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 05:16:08,159 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:16:08,159 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:16:08,159 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:16:08,160 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-27 05:16:08,191 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-27 05:16:08,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 429 transitions, 1002 flow [2023-08-27 05:16:10,564 INFO L124 PetriNetUnfolderBase]: 2438/12283 cut-off events. [2023-08-27 05:16:10,565 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-27 05:16:10,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14660 conditions, 12283 events. 2438/12283 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 121998 event pairs, 1291 based on Foata normal form. 0/10039 useless extension candidates. Maximal degree in co-relation 7384. Up to 2304 conditions per place. [2023-08-27 05:16:10,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 377 places, 429 transitions, 1002 flow [2023-08-27 05:16:10,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 377 places, 429 transitions, 1002 flow [2023-08-27 05:16:10,794 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:16:10,794 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 377 places, 429 transitions, 1002 flow [2023-08-27 05:16:10,795 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 377 places, 429 transitions, 1002 flow [2023-08-27 05:16:10,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 429 transitions, 1002 flow [2023-08-27 05:16:13,100 INFO L124 PetriNetUnfolderBase]: 2438/12283 cut-off events. [2023-08-27 05:16:13,100 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-27 05:16:13,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14660 conditions, 12283 events. 2438/12283 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 121998 event pairs, 1291 based on Foata normal form. 0/10039 useless extension candidates. Maximal degree in co-relation 7384. Up to 2304 conditions per place. [2023-08-27 05:16:13,812 INFO L119 LiptonReduction]: Number of co-enabled transitions 140616 [2023-08-27 05:16:17,576 INFO L134 LiptonReduction]: Checked pairs total: 417951 [2023-08-27 05:16:17,576 INFO L136 LiptonReduction]: Total number of compositions: 305 [2023-08-27 05:16:17,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:16:17,577 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;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:16:17,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:16:17,635 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:16:17,635 INFO L124 PetriNetUnfolderBase]: 153/688 cut-off events. [2023-08-27 05:16:17,635 INFO L125 PetriNetUnfolderBase]: For 285/285 co-relation queries the response was YES. [2023-08-27 05:16:17,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:16:17,635 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:16:17,635 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:16:17,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:16:17,636 INFO L85 PathProgramCache]: Analyzing trace with hash -827754471, now seen corresponding path program 1 times [2023-08-27 05:16:17,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:16:17,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223465448] [2023-08-27 05:16:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:16:17,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:16:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:16:17,654 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:16:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:16:17,671 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:16:17,672 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:16:17,672 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:16:17,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 05:16:17,672 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:16:17,672 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:16:17,673 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:16:17,673 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-27 05:16:17,702 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-27 05:16:17,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 410 places, 467 transitions, 1104 flow [2023-08-27 05:16:23,198 INFO L124 PetriNetUnfolderBase]: 5268/24394 cut-off events. [2023-08-27 05:16:23,199 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-27 05:16:23,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29600 conditions, 24394 events. 5268/24394 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 272115 event pairs, 3084 based on Foata normal form. 0/20081 useless extension candidates. Maximal degree in co-relation 14643. Up to 5120 conditions per place. [2023-08-27 05:16:23,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 410 places, 467 transitions, 1104 flow [2023-08-27 05:16:23,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 410 places, 467 transitions, 1104 flow [2023-08-27 05:16:23,717 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:16:23,717 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 410 places, 467 transitions, 1104 flow [2023-08-27 05:16:23,717 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 410 places, 467 transitions, 1104 flow [2023-08-27 05:16:23,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 410 places, 467 transitions, 1104 flow [2023-08-27 05:16:28,846 INFO L124 PetriNetUnfolderBase]: 5268/24394 cut-off events. [2023-08-27 05:16:28,846 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-27 05:16:29,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29600 conditions, 24394 events. 5268/24394 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 272115 event pairs, 3084 based on Foata normal form. 0/20081 useless extension candidates. Maximal degree in co-relation 14643. Up to 5120 conditions per place. [2023-08-27 05:16:30,377 INFO L119 LiptonReduction]: Number of co-enabled transitions 170280 [2023-08-27 05:16:34,480 INFO L134 LiptonReduction]: Checked pairs total: 518449 [2023-08-27 05:16:34,480 INFO L136 LiptonReduction]: Total number of compositions: 322 [2023-08-27 05:16:34,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:16:34,484 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;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:16:34,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:16:34,579 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:16:34,579 INFO L124 PetriNetUnfolderBase]: 255/1001 cut-off events. [2023-08-27 05:16:34,579 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2023-08-27 05:16:34,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:16:34,579 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:16:34,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:16:34,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:16:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1069655168, now seen corresponding path program 1 times [2023-08-27 05:16:34,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:16:34,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318699845] [2023-08-27 05:16:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:16:34,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:16:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:16:34,612 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:16:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:16:34,638 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:16:34,638 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:16:34,638 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:16:34,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 05:16:34,638 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:16:34,639 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:16:34,639 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:16:34,639 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-27 05:16:34,685 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-27 05:16:34,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 443 places, 505 transitions, 1208 flow [2023-08-27 05:16:46,393 INFO L124 PetriNetUnfolderBase]: 11426/49049 cut-off events. [2023-08-27 05:16:46,394 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-27 05:16:47,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60413 conditions, 49049 events. 11426/49049 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 613489 event pairs, 7181 based on Foata normal form. 0/40619 useless extension candidates. Maximal degree in co-relation 29583. Up to 11264 conditions per place. [2023-08-27 05:16:47,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 443 places, 505 transitions, 1208 flow [2023-08-27 05:16:48,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 443 places, 505 transitions, 1208 flow [2023-08-27 05:16:48,493 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:16:48,494 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 443 places, 505 transitions, 1208 flow [2023-08-27 05:16:48,494 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 443 places, 505 transitions, 1208 flow [2023-08-27 05:16:48,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 443 places, 505 transitions, 1208 flow [2023-08-27 05:17:00,283 INFO L124 PetriNetUnfolderBase]: 11426/49049 cut-off events. [2023-08-27 05:17:00,283 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-27 05:17:01,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60413 conditions, 49049 events. 11426/49049 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 613489 event pairs, 7181 based on Foata normal form. 0/40619 useless extension candidates. Maximal degree in co-relation 29583. Up to 11264 conditions per place. [2023-08-27 05:17:05,101 INFO L119 LiptonReduction]: Number of co-enabled transitions 202752 [2023-08-27 05:17:09,258 INFO L134 LiptonReduction]: Checked pairs total: 620180 [2023-08-27 05:17:09,258 INFO L136 LiptonReduction]: Total number of compositions: 350 [2023-08-27 05:17:09,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:17:09,260 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;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:17:09,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:17:09,368 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:17:09,368 INFO L124 PetriNetUnfolderBase]: 385/1417 cut-off events. [2023-08-27 05:17:09,368 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2023-08-27 05:17:09,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:17:09,368 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:17:09,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:17:09,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:17:09,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1693492620, now seen corresponding path program 1 times [2023-08-27 05:17:09,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:17:09,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483167506] [2023-08-27 05:17:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:17:09,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:17:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:09,415 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:17:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:09,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:17:09,446 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:17:09,447 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:17:09,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 05:17:09,447 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:17:09,449 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:17:09,449 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:17:09,449 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-27 05:17:09,483 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-27 05:17:09,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 476 places, 543 transitions, 1314 flow [2023-08-27 05:17:37,934 INFO L124 PetriNetUnfolderBase]: 24752/99304 cut-off events. [2023-08-27 05:17:37,934 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-27 05:17:43,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123995 conditions, 99304 events. 24752/99304 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1476. Compared 1359379 event pairs, 16398 based on Foata normal form. 0/82661 useless extension candidates. Maximal degree in co-relation 60396. Up to 24576 conditions per place. [2023-08-27 05:17:43,184 INFO L82 GeneralOperation]: Start removeDead. Operand has 476 places, 543 transitions, 1314 flow [2023-08-27 05:17:44,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 476 places, 543 transitions, 1314 flow [2023-08-27 05:17:44,860 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:17:44,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 476 places, 543 transitions, 1314 flow [2023-08-27 05:17:44,860 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 476 places, 543 transitions, 1314 flow [2023-08-27 05:17:44,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 476 places, 543 transitions, 1314 flow [2023-08-27 05:18:10,557 INFO L124 PetriNetUnfolderBase]: 24752/99304 cut-off events. [2023-08-27 05:18:10,557 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-27 05:18:14,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123995 conditions, 99304 events. 24752/99304 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1476. Compared 1359379 event pairs, 16398 based on Foata normal form. 0/82661 useless extension candidates. Maximal degree in co-relation 60396. Up to 24576 conditions per place. [2023-08-27 05:18:22,271 INFO L119 LiptonReduction]: Number of co-enabled transitions 238032 [2023-08-27 05:18:26,558 INFO L134 LiptonReduction]: Checked pairs total: 734097 [2023-08-27 05:18:26,558 INFO L136 LiptonReduction]: Total number of compositions: 378 [2023-08-27 05:18:26,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:18:26,559 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;@63135c59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:18:26,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:18:26,764 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:18:26,764 INFO L124 PetriNetUnfolderBase]: 575/1995 cut-off events. [2023-08-27 05:18:26,764 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-27 05:18:26,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:18:26,765 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:18:26,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:18:26,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:18:26,765 INFO L85 PathProgramCache]: Analyzing trace with hash -189071716, now seen corresponding path program 1 times [2023-08-27 05:18:26,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:18:26,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221992532] [2023-08-27 05:18:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:18:26,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:18:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:18:26,789 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:18:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:18:26,813 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:18:26,814 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:18:26,814 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:18:26,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 05:18:26,814 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:18:26,817 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:18:26,817 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:18:26,817 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-27 05:18:26,855 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-27 05:18:26,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 509 places, 581 transitions, 1422 flow [2023-08-27 05:19:27,755 INFO L124 PetriNetUnfolderBase]: 53438/201783 cut-off events. [2023-08-27 05:19:27,755 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-27 05:19:37,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255162 conditions, 201783 events. 53438/201783 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2895. Compared 3016164 event pairs, 36879 based on Foata normal form. 0/168735 useless extension candidates. Maximal degree in co-relation 123978. Up to 53248 conditions per place. [2023-08-27 05:19:37,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 509 places, 581 transitions, 1422 flow [2023-08-27 05:19:41,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 509 places, 581 transitions, 1422 flow [2023-08-27 05:19:41,493 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:19:41,493 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 509 places, 581 transitions, 1422 flow [2023-08-27 05:19:41,493 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 509 places, 581 transitions, 1422 flow [2023-08-27 05:19:41,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 509 places, 581 transitions, 1422 flow