/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_27-funptr_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 05:11:36,576 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 05:11:36,646 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 05:11:36,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 05:11:36,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 05:11:36,674 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 05:11:36,675 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 05:11:36,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 05:11:36,678 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 05:11:36,685 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 05:11:36,685 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 05:11:36,685 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 05:11:36,685 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 05:11:36,686 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 05:11:36,686 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 05:11:36,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 05:11:36,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 05:11:36,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 05:11:36,687 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 05:11:36,687 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 05:11:36,687 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 05:11:36,687 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 05:11:36,687 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 05:11:36,688 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 05:11:36,688 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 05:11:36,688 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 05:11:36,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 05:11:36,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:11:36,688 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 05:11:36,688 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 05:11:36,689 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 05:11:36,689 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 05:11:36,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 05:11:36,689 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 05:11:36,690 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 05:11:36,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 05:11:36,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 05:11:36,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 05:11:36,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 05:11:36,936 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 05:11:36,936 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 05:11:36,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-27 05:11:37,898 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 05:11:38,097 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 05:11:38,097 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-27 05:11:38,124 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/086264fea/6c46979839f34c2295807812faaf1fef/FLAG45492972c [2023-08-27 05:11:38,133 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/086264fea/6c46979839f34c2295807812faaf1fef [2023-08-27 05:11:38,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 05:11:38,135 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 05:11:38,136 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 05:11:38,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 05:11:38,138 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 05:11:38,139 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b35bb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38, skipping insertion in model container [2023-08-27 05:11:38,139 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,169 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 05:11:38,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:11:38,487 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 05:11:38,510 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:11:38,511 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:11:38,515 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-27 05:11:38,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:11:38,585 WARN L669 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 05:11:38,589 INFO L206 MainTranslator]: Completed translation [2023-08-27 05:11:38,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38 WrapperNode [2023-08-27 05:11:38,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 05:11:38,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 05:11:38,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 05:11:38,591 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 05:11:38,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,619 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,643 INFO L138 Inliner]: procedures = 273, calls = 44, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 165 [2023-08-27 05:11:38,643 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 05:11:38,644 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 05:11:38,644 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 05:11:38,644 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 05:11:38,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,663 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,664 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,668 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,670 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,671 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,672 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,683 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 05:11:38,684 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 05:11:38,684 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 05:11:38,684 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 05:11:38,685 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (1/1) ... [2023-08-27 05:11:38,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:11:38,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:11:38,704 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 05:11:38,713 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 05:11:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 05:11:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 05:11:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 05:11:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 05:11:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-27 05:11:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 05:11:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-27 05:11:38,732 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-27 05:11:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 05:11:38,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 05:11:38,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 05:11:38,734 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 05:11:38,845 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 05:11:38,851 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 05:11:39,094 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 05:11:39,099 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 05:11:39,100 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-27 05:11:39,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:11:39 BoogieIcfgContainer [2023-08-27 05:11:39,101 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 05:11:39,103 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 05:11:39,103 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 05:11:39,105 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 05:11:39,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:11:38" (1/3) ... [2023-08-27 05:11:39,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7669dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:11:39, skipping insertion in model container [2023-08-27 05:11:39,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:11:38" (2/3) ... [2023-08-27 05:11:39,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7669dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:11:39, skipping insertion in model container [2023-08-27 05:11:39,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:11:39" (3/3) ... [2023-08-27 05:11:39,106 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-08-27 05:11:39,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 05:11:39,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-27 05:11:39,157 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 05:11:39,221 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-27 05:11:39,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 175 transitions, 358 flow [2023-08-27 05:11:39,325 INFO L124 PetriNetUnfolderBase]: 26/218 cut-off events. [2023-08-27 05:11:39,326 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 05:11:39,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 218 events. 26/218 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 645 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 130. Up to 4 conditions per place. [2023-08-27 05:11:39,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 175 transitions, 358 flow [2023-08-27 05:11:39,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 166 transitions, 337 flow [2023-08-27 05:11:39,341 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:11:39,349 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 166 transitions, 337 flow [2023-08-27 05:11:39,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 166 transitions, 337 flow [2023-08-27 05:11:39,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 166 transitions, 337 flow [2023-08-27 05:11:39,394 INFO L124 PetriNetUnfolderBase]: 25/209 cut-off events. [2023-08-27 05:11:39,394 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:11:39,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 209 events. 25/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 622 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 130. Up to 4 conditions per place. [2023-08-27 05:11:39,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 8268 [2023-08-27 05:11:42,581 INFO L134 LiptonReduction]: Checked pairs total: 15696 [2023-08-27 05:11:42,581 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-27 05:11:42,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:11:42,593 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;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:11:42,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:11:42,596 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:11:42,596 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-27 05:11:42,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:11:42,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:11:42,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-27 05:11:42,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:11:42,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:11:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1107299266, now seen corresponding path program 1 times [2023-08-27 05:11:42,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:11:42,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130155705] [2023-08-27 05:11:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:11:42,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:11:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:42,689 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:11:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:42,738 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:11:42,741 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:11:42,742 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:11:42,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 05:11:42,744 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:11:42,748 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:11:42,749 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:11:42,749 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-27 05:11:42,769 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 05:11:42,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 528 flow [2023-08-27 05:11:42,847 INFO L124 PetriNetUnfolderBase]: 48/378 cut-off events. [2023-08-27 05:11:42,847 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:11:42,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 378 events. 48/378 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1403 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 228. Up to 8 conditions per place. [2023-08-27 05:11:42,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 255 transitions, 528 flow [2023-08-27 05:11:42,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 255 transitions, 528 flow [2023-08-27 05:11:42,853 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:11:42,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 255 transitions, 528 flow [2023-08-27 05:11:42,853 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 255 transitions, 528 flow [2023-08-27 05:11:42,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 528 flow [2023-08-27 05:11:42,885 INFO L124 PetriNetUnfolderBase]: 48/378 cut-off events. [2023-08-27 05:11:42,886 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:11:42,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 378 events. 48/378 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1403 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 228. Up to 8 conditions per place. [2023-08-27 05:11:42,898 INFO L119 LiptonReduction]: Number of co-enabled transitions 31668 [2023-08-27 05:11:46,102 INFO L134 LiptonReduction]: Checked pairs total: 89150 [2023-08-27 05:11:46,102 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-08-27 05:11:46,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:11:46,104 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;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:11:46,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:11:46,108 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:11:46,108 INFO L124 PetriNetUnfolderBase]: 11/76 cut-off events. [2023-08-27 05:11:46,108 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 05:11:46,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:11:46,109 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-27 05:11:46,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:11:46,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:11:46,109 INFO L85 PathProgramCache]: Analyzing trace with hash -417828085, now seen corresponding path program 1 times [2023-08-27 05:11:46,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:11:46,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048489901] [2023-08-27 05:11:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:11:46,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:11:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:46,143 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:11:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:46,160 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:11:46,160 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:11:46,160 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:11:46,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 05:11:46,160 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:11:46,161 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:11:46,161 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:11:46,161 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-27 05:11:46,181 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 05:11:46,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 335 transitions, 700 flow [2023-08-27 05:11:46,235 INFO L124 PetriNetUnfolderBase]: 75/579 cut-off events. [2023-08-27 05:11:46,235 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:11:46,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 579 events. 75/579 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2393 event pairs, 1 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 386. Up to 16 conditions per place. [2023-08-27 05:11:46,241 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 335 transitions, 700 flow [2023-08-27 05:11:46,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 335 transitions, 700 flow [2023-08-27 05:11:46,245 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:11:46,245 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 294 places, 335 transitions, 700 flow [2023-08-27 05:11:46,246 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 294 places, 335 transitions, 700 flow [2023-08-27 05:11:46,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 335 transitions, 700 flow [2023-08-27 05:11:46,300 INFO L124 PetriNetUnfolderBase]: 75/579 cut-off events. [2023-08-27 05:11:46,300 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:11:46,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 579 events. 75/579 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2393 event pairs, 1 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 386. Up to 16 conditions per place. [2023-08-27 05:11:46,323 INFO L119 LiptonReduction]: Number of co-enabled transitions 66456 [2023-08-27 05:11:49,916 INFO L134 LiptonReduction]: Checked pairs total: 201636 [2023-08-27 05:11:49,917 INFO L136 LiptonReduction]: Total number of compositions: 253 [2023-08-27 05:11:49,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:11:49,919 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;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:11:49,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:11:49,927 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:11:49,927 INFO L124 PetriNetUnfolderBase]: 30/150 cut-off events. [2023-08-27 05:11:49,927 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-27 05:11:49,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:11:49,927 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-27 05:11:49,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:11:49,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:11:49,927 INFO L85 PathProgramCache]: Analyzing trace with hash -687850804, now seen corresponding path program 1 times [2023-08-27 05:11:49,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:11:49,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789771908] [2023-08-27 05:11:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:11:49,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:11:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:49,955 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:11:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:49,997 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:11:49,998 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:11:49,998 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:11:49,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 05:11:49,998 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:11:49,999 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:11:49,999 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:11:50,000 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-27 05:11:50,028 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-27 05:11:50,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 362 places, 415 transitions, 874 flow [2023-08-27 05:11:50,157 INFO L124 PetriNetUnfolderBase]: 114/864 cut-off events. [2023-08-27 05:11:50,158 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-27 05:11:50,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 864 events. 114/864 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3920 event pairs, 6 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 599. Up to 32 conditions per place. [2023-08-27 05:11:50,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 362 places, 415 transitions, 874 flow [2023-08-27 05:11:50,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 362 places, 415 transitions, 874 flow [2023-08-27 05:11:50,179 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:11:50,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 362 places, 415 transitions, 874 flow [2023-08-27 05:11:50,180 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 362 places, 415 transitions, 874 flow [2023-08-27 05:11:50,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 362 places, 415 transitions, 874 flow [2023-08-27 05:11:50,272 INFO L124 PetriNetUnfolderBase]: 114/864 cut-off events. [2023-08-27 05:11:50,272 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-27 05:11:50,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 864 events. 114/864 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3920 event pairs, 6 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 599. Up to 32 conditions per place. [2023-08-27 05:11:50,311 INFO L119 LiptonReduction]: Number of co-enabled transitions 113880 [2023-08-27 05:11:54,375 INFO L134 LiptonReduction]: Checked pairs total: 384588 [2023-08-27 05:11:54,375 INFO L136 LiptonReduction]: Total number of compositions: 305 [2023-08-27 05:11:54,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:11:54,377 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;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:11:54,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:11:54,389 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:11:54,389 INFO L124 PetriNetUnfolderBase]: 45/216 cut-off events. [2023-08-27 05:11:54,389 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:11:54,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:11:54,389 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-27 05:11:54,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:11:54,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:11:54,390 INFO L85 PathProgramCache]: Analyzing trace with hash 51496139, now seen corresponding path program 1 times [2023-08-27 05:11:54,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:11:54,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636275300] [2023-08-27 05:11:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:11:54,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:11:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:54,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:11:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:54,425 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:11:54,425 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:11:54,425 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:11:54,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 05:11:54,425 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:11:54,426 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:11:54,426 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:11:54,426 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-27 05:11:54,458 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-27 05:11:54,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 430 places, 495 transitions, 1050 flow [2023-08-27 05:11:54,654 INFO L124 PetriNetUnfolderBase]: 181/1321 cut-off events. [2023-08-27 05:11:54,654 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-27 05:11:54,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 1321 events. 181/1321 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6747 event pairs, 23 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 909. Up to 80 conditions per place. [2023-08-27 05:11:54,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 430 places, 495 transitions, 1050 flow [2023-08-27 05:11:54,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 430 places, 495 transitions, 1050 flow [2023-08-27 05:11:54,681 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:11:54,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 430 places, 495 transitions, 1050 flow [2023-08-27 05:11:54,682 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 430 places, 495 transitions, 1050 flow [2023-08-27 05:11:54,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 430 places, 495 transitions, 1050 flow [2023-08-27 05:11:54,844 INFO L124 PetriNetUnfolderBase]: 181/1321 cut-off events. [2023-08-27 05:11:54,844 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-27 05:11:54,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 1321 events. 181/1321 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6747 event pairs, 23 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 909. Up to 80 conditions per place. [2023-08-27 05:11:54,923 INFO L119 LiptonReduction]: Number of co-enabled transitions 173940 [2023-08-27 05:11:59,625 INFO L134 LiptonReduction]: Checked pairs total: 540476 [2023-08-27 05:11:59,625 INFO L136 LiptonReduction]: Total number of compositions: 369 [2023-08-27 05:11:59,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:11:59,627 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;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:11:59,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:11:59,643 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:11:59,643 INFO L124 PetriNetUnfolderBase]: 66/301 cut-off events. [2023-08-27 05:11:59,643 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-27 05:11:59,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:11:59,643 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:11:59,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:11:59,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:11:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash -457063598, now seen corresponding path program 1 times [2023-08-27 05:11:59,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:11:59,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015867261] [2023-08-27 05:11:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:11:59,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:11:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:59,674 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:11:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:59,695 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:11:59,695 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:11:59,695 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:11:59,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 05:11:59,695 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:11:59,696 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:11:59,696 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:11:59,696 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-27 05:11:59,721 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-27 05:11:59,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 498 places, 575 transitions, 1228 flow [2023-08-27 05:12:00,051 INFO L124 PetriNetUnfolderBase]: 312/2130 cut-off events. [2023-08-27 05:12:00,052 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-27 05:12:00,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2362 conditions, 2130 events. 312/2130 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12743 event pairs, 72 based on Foata normal form. 0/1689 useless extension candidates. Maximal degree in co-relation 1420. Up to 192 conditions per place. [2023-08-27 05:12:00,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 498 places, 575 transitions, 1228 flow [2023-08-27 05:12:00,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 498 places, 575 transitions, 1228 flow [2023-08-27 05:12:00,121 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:12:00,122 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 498 places, 575 transitions, 1228 flow [2023-08-27 05:12:00,122 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 498 places, 575 transitions, 1228 flow [2023-08-27 05:12:00,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 498 places, 575 transitions, 1228 flow [2023-08-27 05:12:00,446 INFO L124 PetriNetUnfolderBase]: 312/2130 cut-off events. [2023-08-27 05:12:00,447 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-27 05:12:00,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2362 conditions, 2130 events. 312/2130 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12743 event pairs, 72 based on Foata normal form. 0/1689 useless extension candidates. Maximal degree in co-relation 1420. Up to 192 conditions per place. [2023-08-27 05:12:00,602 INFO L119 LiptonReduction]: Number of co-enabled transitions 246636 [2023-08-27 05:12:05,582 INFO L134 LiptonReduction]: Checked pairs total: 781734 [2023-08-27 05:12:05,583 INFO L136 LiptonReduction]: Total number of compositions: 418 [2023-08-27 05:12:05,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:12:05,584 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:12:05,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:12:05,608 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:12:05,608 INFO L124 PetriNetUnfolderBase]: 83/381 cut-off events. [2023-08-27 05:12:05,608 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-27 05:12:05,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:12:05,609 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:12:05,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:12:05,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:12:05,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1266391389, now seen corresponding path program 1 times [2023-08-27 05:12:05,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:12:05,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566155817] [2023-08-27 05:12:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:12:05,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:12:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:12:05,635 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:12:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:12:05,656 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:12:05,656 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:12:05,657 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:12:05,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 05:12:05,657 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:12:05,657 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:12:05,657 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:12:05,657 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-27 05:12:05,683 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-27 05:12:05,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 566 places, 655 transitions, 1408 flow [2023-08-27 05:12:06,513 INFO L124 PetriNetUnfolderBase]: 587/3659 cut-off events. [2023-08-27 05:12:06,513 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-27 05:12:06,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4157 conditions, 3659 events. 587/3659 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 25810 event pairs, 201 based on Foata normal form. 0/2932 useless extension candidates. Maximal degree in co-relation 2348. Up to 448 conditions per place. [2023-08-27 05:12:06,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 566 places, 655 transitions, 1408 flow [2023-08-27 05:12:06,628 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 566 places, 655 transitions, 1408 flow [2023-08-27 05:12:06,629 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:12:06,629 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 566 places, 655 transitions, 1408 flow [2023-08-27 05:12:06,629 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 566 places, 655 transitions, 1408 flow [2023-08-27 05:12:06,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 566 places, 655 transitions, 1408 flow [2023-08-27 05:12:07,391 INFO L124 PetriNetUnfolderBase]: 587/3659 cut-off events. [2023-08-27 05:12:07,392 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-27 05:12:07,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4157 conditions, 3659 events. 587/3659 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 25810 event pairs, 201 based on Foata normal form. 0/2932 useless extension candidates. Maximal degree in co-relation 2348. Up to 448 conditions per place. [2023-08-27 05:12:07,770 INFO L119 LiptonReduction]: Number of co-enabled transitions 331968 [2023-08-27 05:12:13,354 INFO L134 LiptonReduction]: Checked pairs total: 1065092 [2023-08-27 05:12:13,355 INFO L136 LiptonReduction]: Total number of compositions: 475 [2023-08-27 05:12:13,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:12:13,358 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;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:12:13,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:12:13,403 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:12:13,403 INFO L124 PetriNetUnfolderBase]: 104/476 cut-off events. [2023-08-27 05:12:13,403 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-08-27 05:12:13,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:12:13,404 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:12:13,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:12:13,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:12:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1253007948, now seen corresponding path program 1 times [2023-08-27 05:12:13,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:12:13,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588841150] [2023-08-27 05:12:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:12:13,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:12:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:12:13,440 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:12:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:12:13,462 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:12:13,463 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:12:13,463 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:12:13,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 05:12:13,463 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:12:13,463 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:12:13,463 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:12:13,464 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-27 05:12:13,503 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-27 05:12:13,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 634 places, 735 transitions, 1590 flow [2023-08-27 05:12:14,989 INFO L124 PetriNetUnfolderBase]: 1182/6660 cut-off events. [2023-08-27 05:12:14,989 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-27 05:12:15,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7745 conditions, 6660 events. 1182/6660 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 55728 event pairs, 522 based on Foata normal form. 0/5391 useless extension candidates. Maximal degree in co-relation 4141. Up to 1024 conditions per place. [2023-08-27 05:12:15,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 634 places, 735 transitions, 1590 flow [2023-08-27 05:12:15,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 634 places, 735 transitions, 1590 flow [2023-08-27 05:12:15,256 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:12:15,256 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 634 places, 735 transitions, 1590 flow [2023-08-27 05:12:15,256 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 634 places, 735 transitions, 1590 flow [2023-08-27 05:12:15,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 634 places, 735 transitions, 1590 flow [2023-08-27 05:12:16,972 INFO L124 PetriNetUnfolderBase]: 1182/6660 cut-off events. [2023-08-27 05:12:16,972 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-27 05:12:17,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7745 conditions, 6660 events. 1182/6660 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 55728 event pairs, 522 based on Foata normal form. 0/5391 useless extension candidates. Maximal degree in co-relation 4141. Up to 1024 conditions per place. [2023-08-27 05:12:17,782 INFO L119 LiptonReduction]: Number of co-enabled transitions 429936 [2023-08-27 05:12:23,863 INFO L134 LiptonReduction]: Checked pairs total: 1368043 [2023-08-27 05:12:23,864 INFO L136 LiptonReduction]: Total number of compositions: 535 [2023-08-27 05:12:23,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:12:23,865 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;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:12:23,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:12:23,910 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:12:23,910 INFO L124 PetriNetUnfolderBase]: 128/586 cut-off events. [2023-08-27 05:12:23,910 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-08-27 05:12:23,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:12:23,910 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:12:23,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:12:23,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:12:23,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1553661414, now seen corresponding path program 1 times [2023-08-27 05:12:23,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:12:23,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581280120] [2023-08-27 05:12:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:12:23,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:12:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:12:23,928 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:12:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:12:23,952 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:12:23,952 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:12:23,952 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:12:23,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 05:12:23,952 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:12:23,955 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:12:23,955 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:12:23,955 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-27 05:12:23,988 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-27 05:12:23,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 702 places, 815 transitions, 1774 flow [2023-08-27 05:12:27,656 INFO L124 PetriNetUnfolderBase]: 2481/12669 cut-off events. [2023-08-27 05:12:27,656 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-27 05:12:28,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15046 conditions, 12669 events. 2481/12669 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 124092 event pairs, 1291 based on Foata normal form. 0/10346 useless extension candidates. Maximal degree in co-relation 7727. Up to 2304 conditions per place. [2023-08-27 05:12:28,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 702 places, 815 transitions, 1774 flow [2023-08-27 05:12:28,313 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 702 places, 815 transitions, 1774 flow [2023-08-27 05:12:28,313 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:12:28,313 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 702 places, 815 transitions, 1774 flow [2023-08-27 05:12:28,313 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 702 places, 815 transitions, 1774 flow [2023-08-27 05:12:28,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 702 places, 815 transitions, 1774 flow [2023-08-27 05:12:31,786 INFO L124 PetriNetUnfolderBase]: 2481/12669 cut-off events. [2023-08-27 05:12:31,786 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-27 05:12:32,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15046 conditions, 12669 events. 2481/12669 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 124092 event pairs, 1291 based on Foata normal form. 0/10346 useless extension candidates. Maximal degree in co-relation 7727. Up to 2304 conditions per place. [2023-08-27 05:12:33,470 INFO L119 LiptonReduction]: Number of co-enabled transitions 540540 [2023-08-27 05:12:40,039 INFO L134 LiptonReduction]: Checked pairs total: 1742775 [2023-08-27 05:12:40,040 INFO L136 LiptonReduction]: Total number of compositions: 582 [2023-08-27 05:12:40,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:12:40,042 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;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:12:40,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:12:40,107 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:12:40,107 INFO L124 PetriNetUnfolderBase]: 158/722 cut-off events. [2023-08-27 05:12:40,107 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2023-08-27 05:12:40,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:12:40,107 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:12:40,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:12:40,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:12:40,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1395979055, now seen corresponding path program 1 times [2023-08-27 05:12:40,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:12:40,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295505751] [2023-08-27 05:12:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:12:40,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:12:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:12:40,126 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:12:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:12:40,146 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:12:40,147 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:12:40,147 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:12:40,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 05:12:40,147 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:12:40,151 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:12:40,151 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:12:40,151 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-27 05:12:40,185 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-27 05:12:40,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 770 places, 895 transitions, 1960 flow [2023-08-27 05:12:48,193 INFO L124 PetriNetUnfolderBase]: 5316/24822 cut-off events. [2023-08-27 05:12:48,193 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-27 05:12:49,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30028 conditions, 24822 events. 5316/24822 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 273070 event pairs, 3084 based on Foata normal form. 0/20421 useless extension candidates. Maximal degree in co-relation 15026. Up to 5120 conditions per place. [2023-08-27 05:12:49,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 770 places, 895 transitions, 1960 flow [2023-08-27 05:12:49,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 770 places, 895 transitions, 1960 flow [2023-08-27 05:12:49,515 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:12:49,515 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 770 places, 895 transitions, 1960 flow [2023-08-27 05:12:49,516 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 770 places, 895 transitions, 1960 flow [2023-08-27 05:12:49,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 770 places, 895 transitions, 1960 flow [2023-08-27 05:12:57,656 INFO L124 PetriNetUnfolderBase]: 5316/24822 cut-off events. [2023-08-27 05:12:57,657 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-27 05:12:58,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30028 conditions, 24822 events. 5316/24822 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 273070 event pairs, 3084 based on Foata normal form. 0/20421 useless extension candidates. Maximal degree in co-relation 15026. Up to 5120 conditions per place. [2023-08-27 05:13:01,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 663780 [2023-08-27 05:13:08,168 INFO L134 LiptonReduction]: Checked pairs total: 2151774 [2023-08-27 05:13:08,168 INFO L136 LiptonReduction]: Total number of compositions: 638 [2023-08-27 05:13:08,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:13:08,170 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;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:13:08,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:13:08,254 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:13:08,254 INFO L124 PetriNetUnfolderBase]: 197/892 cut-off events. [2023-08-27 05:13:08,254 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2023-08-27 05:13:08,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:13:08,254 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:13:08,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:13:08,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:13:08,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1660353501, now seen corresponding path program 1 times [2023-08-27 05:13:08,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:13:08,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178854832] [2023-08-27 05:13:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:13:08,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:13:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:13:08,270 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:13:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:13:08,284 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:13:08,284 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:13:08,285 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:13:08,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 05:13:08,285 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:13:08,285 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:13:08,285 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:13:08,285 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-27 05:13:08,363 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-27 05:13:08,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 838 places, 975 transitions, 2148 flow [2023-08-27 05:13:25,698 INFO L124 PetriNetUnfolderBase]: 11479/49519 cut-off events. [2023-08-27 05:13:25,699 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-27 05:13:28,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60883 conditions, 49519 events. 11479/49519 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 612625 event pairs, 7181 based on Foata normal form. 0/40992 useless extension candidates. Maximal degree in co-relation 30006. Up to 11264 conditions per place. [2023-08-27 05:13:28,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 838 places, 975 transitions, 2148 flow [2023-08-27 05:13:29,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 838 places, 975 transitions, 2148 flow [2023-08-27 05:13:29,137 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:13:29,137 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 838 places, 975 transitions, 2148 flow [2023-08-27 05:13:29,137 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 838 places, 975 transitions, 2148 flow [2023-08-27 05:13:29,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 838 places, 975 transitions, 2148 flow [2023-08-27 05:13:46,631 INFO L124 PetriNetUnfolderBase]: 11479/49519 cut-off events. [2023-08-27 05:13:46,631 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-27 05:13:48,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60883 conditions, 49519 events. 11479/49519 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 612625 event pairs, 7181 based on Foata normal form. 0/40992 useless extension candidates. Maximal degree in co-relation 30006. Up to 11264 conditions per place. [2023-08-27 05:13:54,156 INFO L119 LiptonReduction]: Number of co-enabled transitions 799656 [2023-08-27 05:14:01,970 INFO L134 LiptonReduction]: Checked pairs total: 2577950 [2023-08-27 05:14:01,970 INFO L136 LiptonReduction]: Total number of compositions: 697 [2023-08-27 05:14:01,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:14:01,980 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;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:14:01,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:14:02,094 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:14:02,094 INFO L124 PetriNetUnfolderBase]: 238/1090 cut-off events. [2023-08-27 05:14:02,094 INFO L125 PetriNetUnfolderBase]: For 436/436 co-relation queries the response was YES. [2023-08-27 05:14:02,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:14:02,094 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:14:02,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:14:02,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:14:02,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1473419058, now seen corresponding path program 1 times [2023-08-27 05:14:02,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:14:02,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871310840] [2023-08-27 05:14:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:14:02,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:14:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:14:02,118 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:14:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:14:02,143 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:14:02,143 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:14:02,143 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:14:02,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 05:14:02,143 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:14:02,145 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:14:02,145 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:14:02,145 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-27 05:14:02,192 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-27 05:14:02,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 906 places, 1055 transitions, 2338 flow [2023-08-27 05:14:41,843 INFO L124 PetriNetUnfolderBase]: 24810/99816 cut-off events. [2023-08-27 05:14:41,843 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-27 05:14:53,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124507 conditions, 99816 events. 24810/99816 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1409. Compared 1352165 event pairs, 16398 based on Foata normal form. 0/83067 useless extension candidates. Maximal degree in co-relation 60859. Up to 24576 conditions per place. [2023-08-27 05:14:53,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 906 places, 1055 transitions, 2338 flow [2023-08-27 05:14:56,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 906 places, 1055 transitions, 2338 flow [2023-08-27 05:14:56,182 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:14:56,183 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 906 places, 1055 transitions, 2338 flow [2023-08-27 05:14:56,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 906 places, 1055 transitions, 2338 flow [2023-08-27 05:14:56,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 906 places, 1055 transitions, 2338 flow [2023-08-27 05:15:34,908 INFO L124 PetriNetUnfolderBase]: 24810/99816 cut-off events. [2023-08-27 05:15:34,909 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-27 05:15:45,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124507 conditions, 99816 events. 24810/99816 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1409. Compared 1352165 event pairs, 16398 based on Foata normal form. 0/83067 useless extension candidates. Maximal degree in co-relation 60859. Up to 24576 conditions per place. [2023-08-27 05:15:58,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 948168 [2023-08-27 05:16:06,933 INFO L134 LiptonReduction]: Checked pairs total: 3114474 [2023-08-27 05:16:06,933 INFO L136 LiptonReduction]: Total number of compositions: 749 [2023-08-27 05:16:06,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:16:06,935 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;@2d04cdb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:16:06,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:16:07,104 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:16:07,104 INFO L124 PetriNetUnfolderBase]: 316/1394 cut-off events. [2023-08-27 05:16:07,104 INFO L125 PetriNetUnfolderBase]: For 613/613 co-relation queries the response was YES. [2023-08-27 05:16:07,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:16:07,104 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 05:16:07,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:16:07,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:16:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2074382683, now seen corresponding path program 1 times [2023-08-27 05:16:07,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:16:07,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310745567] [2023-08-27 05:16:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:16:07,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:16:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:16:07,121 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:16:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:16:07,138 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:16:07,138 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:16:07,138 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:16:07,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 05:16:07,138 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:16:07,139 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:16:07,139 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:16:07,139 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-27 05:16:07,228 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-27 05:16:07,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 974 places, 1135 transitions, 2530 flow