/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.data.races.in.concurrent.programs true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 18:05:20,442 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 18:05:20,529 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-25 18:05:20,534 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 18:05:20,535 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 18:05:20,570 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 18:05:20,571 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 18:05:20,571 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 18:05:20,572 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 18:05:20,576 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 18:05:20,576 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 18:05:20,576 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 18:05:20,577 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 18:05:20,578 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 18:05:20,578 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 18:05:20,578 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 18:05:20,579 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 18:05:20,579 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 18:05:20,579 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 18:05:20,579 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 18:05:20,579 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 18:05:20,580 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 18:05:20,580 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 18:05:20,581 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 18:05:20,581 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 18:05:20,581 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 18:05:20,582 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 18:05:20,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:05:20,582 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 18:05:20,582 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 18:05:20,583 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 18:05:20,583 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 18:05:20,584 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 18:05:20,584 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 18:05:20,584 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 18:05:20,584 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 18:05:20,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 18:05:20,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 18:05:20,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 18:05:20,936 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 18:05:20,938 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 18:05:20,939 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-08-25 18:05:22,166 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 18:05:22,472 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 18:05:22,472 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-08-25 18:05:22,495 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a149dbcc/7844d91a6c544db2b96af7d1c5b3637e/FLAG24b9dd2c0 [2023-08-25 18:05:22,513 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a149dbcc/7844d91a6c544db2b96af7d1c5b3637e [2023-08-25 18:05:22,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 18:05:22,517 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 18:05:22,518 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 18:05:22,518 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 18:05:22,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 18:05:22,521 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:05:22" (1/1) ... [2023-08-25 18:05:22,522 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f91a895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:22, skipping insertion in model container [2023-08-25 18:05:22,522 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:05:22" (1/1) ... [2023-08-25 18:05:22,555 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 18:05:22,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:05:22,943 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 18:05:22,968 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-25 18:05:22,970 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-25 18:05:22,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:05:23,016 WARN L669 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-25 18:05:23,023 INFO L206 MainTranslator]: Completed translation [2023-08-25 18:05:23,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23 WrapperNode [2023-08-25 18:05:23,023 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 18:05:23,024 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 18:05:23,025 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 18:05:23,025 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 18:05:23,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (1/1) ... [2023-08-25 18:05:23,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (1/1) ... [2023-08-25 18:05:23,100 INFO L138 Inliner]: procedures = 173, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 160 [2023-08-25 18:05:23,100 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 18:05:23,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 18:05:23,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 18:05:23,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 18:05:23,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (1/1) ... [2023-08-25 18:05:23,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (1/1) ... [2023-08-25 18:05:23,122 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (1/1) ... [2023-08-25 18:05:23,122 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (1/1) ... [2023-08-25 18:05:23,140 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (1/1) ... [2023-08-25 18:05:23,151 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (1/1) ... [2023-08-25 18:05:23,153 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (1/1) ... [2023-08-25 18:05:23,154 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (1/1) ... [2023-08-25 18:05:23,156 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 18:05:23,157 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 18:05:23,157 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 18:05:23,157 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 18:05:23,158 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (1/1) ... [2023-08-25 18:05:23,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:05:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:05:23,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-25 18:05:23,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-25 18:05:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-25 18:05:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 18:05:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-25 18:05:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 18:05:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 18:05:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-25 18:05:23,236 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-25 18:05:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 18:05:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 18:05:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 18:05:23,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 18:05:23,238 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-25 18:05:23,418 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 18:05:23,421 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 18:05:23,737 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 18:05:23,744 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 18:05:23,745 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-25 18:05:23,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:05:23 BoogieIcfgContainer [2023-08-25 18:05:23,747 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 18:05:23,748 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 18:05:23,749 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 18:05:23,751 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 18:05:23,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:05:22" (1/3) ... [2023-08-25 18:05:23,755 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a820f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:05:23, skipping insertion in model container [2023-08-25 18:05:23,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:05:23" (2/3) ... [2023-08-25 18:05:23,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a820f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:05:23, skipping insertion in model container [2023-08-25 18:05:23,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:05:23" (3/3) ... [2023-08-25 18:05:23,758 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2023-08-25 18:05:23,774 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 18:05:23,774 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-25 18:05:23,774 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 18:05:23,851 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-25 18:05:23,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 169 transitions, 346 flow [2023-08-25 18:05:24,035 INFO L124 PetriNetUnfolderBase]: 27/264 cut-off events. [2023-08-25 18:05:24,036 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-25 18:05:24,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 264 events. 27/264 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 817 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 130. Up to 6 conditions per place. [2023-08-25 18:05:24,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 169 transitions, 346 flow [2023-08-25 18:05:24,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 164 transitions, 333 flow [2023-08-25 18:05:24,056 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:05:24,071 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 164 transitions, 333 flow [2023-08-25 18:05:24,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 164 transitions, 333 flow [2023-08-25 18:05:24,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 164 transitions, 333 flow [2023-08-25 18:05:24,132 INFO L124 PetriNetUnfolderBase]: 26/259 cut-off events. [2023-08-25 18:05:24,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:05:24,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 259 events. 26/259 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 765 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 130. Up to 6 conditions per place. [2023-08-25 18:05:24,142 INFO L119 LiptonReduction]: Number of co-enabled transitions 5454 [2023-08-25 18:05:27,659 INFO L134 LiptonReduction]: Checked pairs total: 10830 [2023-08-25 18:05:27,660 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-25 18:05:27,672 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:05:27,678 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:05:27,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:05:27,683 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:05:27,683 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2023-08-25 18:05:27,684 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:05:27,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:05:27,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-25 18:05:27,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:05:27,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:05:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 811887692, now seen corresponding path program 1 times [2023-08-25 18:05:27,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:05:27,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565511739] [2023-08-25 18:05:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:05:27,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:05:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:27,799 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:05:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:27,842 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:05:27,844 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:05:27,845 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:05:27,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 18:05:27,847 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:05:27,849 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:05:27,850 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:05:27,850 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 18:05:27,869 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-25 18:05:27,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 198 transitions, 414 flow [2023-08-25 18:05:27,919 INFO L124 PetriNetUnfolderBase]: 45/419 cut-off events. [2023-08-25 18:05:27,920 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:05:27,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 419 events. 45/419 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1645 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 266. Up to 9 conditions per place. [2023-08-25 18:05:27,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 198 transitions, 414 flow [2023-08-25 18:05:27,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 198 transitions, 414 flow [2023-08-25 18:05:27,925 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:05:27,926 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 198 transitions, 414 flow [2023-08-25 18:05:27,926 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 198 transitions, 414 flow [2023-08-25 18:05:27,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 198 transitions, 414 flow [2023-08-25 18:05:27,966 INFO L124 PetriNetUnfolderBase]: 45/419 cut-off events. [2023-08-25 18:05:27,966 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:05:27,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 419 events. 45/419 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1645 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 266. Up to 9 conditions per place. [2023-08-25 18:05:27,979 INFO L119 LiptonReduction]: Number of co-enabled transitions 12960 [2023-08-25 18:05:31,425 INFO L134 LiptonReduction]: Checked pairs total: 32783 [2023-08-25 18:05:31,425 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-25 18:05:31,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:05:31,429 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:05:31,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:05:31,435 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:05:31,436 INFO L124 PetriNetUnfolderBase]: 16/82 cut-off events. [2023-08-25 18:05:31,436 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-25 18:05:31,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:05:31,436 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-25 18:05:31,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:05:31,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:05:31,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1190414197, now seen corresponding path program 1 times [2023-08-25 18:05:31,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:05:31,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766765764] [2023-08-25 18:05:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:05:31,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:05:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:31,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:05:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:31,506 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:05:31,506 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:05:31,506 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:05:31,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-25 18:05:31,507 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:05:31,508 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:05:31,508 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:05:31,508 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 18:05:31,529 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-25 18:05:31,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 227 transitions, 484 flow [2023-08-25 18:05:31,630 INFO L124 PetriNetUnfolderBase]: 68/619 cut-off events. [2023-08-25 18:05:31,630 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:05:31,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 68/619 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2771 event pairs, 1 based on Foata normal form. 0/517 useless extension candidates. Maximal degree in co-relation 427. Up to 16 conditions per place. [2023-08-25 18:05:31,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 227 transitions, 484 flow [2023-08-25 18:05:31,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 227 transitions, 484 flow [2023-08-25 18:05:31,638 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:05:31,638 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 227 transitions, 484 flow [2023-08-25 18:05:31,639 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 227 transitions, 484 flow [2023-08-25 18:05:31,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 227 transitions, 484 flow [2023-08-25 18:05:31,700 INFO L124 PetriNetUnfolderBase]: 68/619 cut-off events. [2023-08-25 18:05:31,701 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:05:31,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 68/619 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2771 event pairs, 1 based on Foata normal form. 0/517 useless extension candidates. Maximal degree in co-relation 427. Up to 16 conditions per place. [2023-08-25 18:05:31,723 INFO L119 LiptonReduction]: Number of co-enabled transitions 21870 [2023-08-25 18:05:35,340 INFO L134 LiptonReduction]: Checked pairs total: 55034 [2023-08-25 18:05:35,340 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-25 18:05:35,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:05:35,344 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:05:35,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:05:35,360 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:05:35,360 INFO L124 PetriNetUnfolderBase]: 30/141 cut-off events. [2023-08-25 18:05:35,360 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-25 18:05:35,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:05:35,361 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-25 18:05:35,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:05:35,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:05:35,365 INFO L85 PathProgramCache]: Analyzing trace with hash -595805749, now seen corresponding path program 1 times [2023-08-25 18:05:35,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:05:35,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047588138] [2023-08-25 18:05:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:05:35,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:05:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:35,407 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:05:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:35,432 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:05:35,432 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:05:35,432 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:05:35,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-25 18:05:35,432 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:05:35,433 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:05:35,433 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:05:35,433 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-25 18:05:35,453 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-25 18:05:35,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 256 transitions, 556 flow [2023-08-25 18:05:35,548 INFO L124 PetriNetUnfolderBase]: 103/911 cut-off events. [2023-08-25 18:05:35,549 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:05:35,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 911 events. 103/911 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4420 event pairs, 6 based on Foata normal form. 0/764 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-08-25 18:05:35,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 256 transitions, 556 flow [2023-08-25 18:05:35,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 256 transitions, 556 flow [2023-08-25 18:05:35,570 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:05:35,570 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 234 places, 256 transitions, 556 flow [2023-08-25 18:05:35,570 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 234 places, 256 transitions, 556 flow [2023-08-25 18:05:35,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 256 transitions, 556 flow [2023-08-25 18:05:35,667 INFO L124 PetriNetUnfolderBase]: 103/911 cut-off events. [2023-08-25 18:05:35,667 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:05:35,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 911 events. 103/911 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4420 event pairs, 6 based on Foata normal form. 0/764 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-08-25 18:05:35,697 INFO L119 LiptonReduction]: Number of co-enabled transitions 32400 [2023-08-25 18:05:39,207 INFO L134 LiptonReduction]: Checked pairs total: 76421 [2023-08-25 18:05:39,207 INFO L136 LiptonReduction]: Total number of compositions: 210 [2023-08-25 18:05:39,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:05:39,209 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:05:39,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:05:39,223 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:05:39,223 INFO L124 PetriNetUnfolderBase]: 42/199 cut-off events. [2023-08-25 18:05:39,223 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-25 18:05:39,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:05:39,223 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-25 18:05:39,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:05:39,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:05:39,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1980035585, now seen corresponding path program 1 times [2023-08-25 18:05:39,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:05:39,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515682034] [2023-08-25 18:05:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:05:39,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:05:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:39,248 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:05:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:39,271 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:05:39,271 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:05:39,272 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:05:39,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 18:05:39,272 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:05:39,272 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:05:39,273 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:05:39,273 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-25 18:05:39,293 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-25 18:05:39,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 285 transitions, 630 flow [2023-08-25 18:05:39,502 INFO L124 PetriNetUnfolderBase]: 166/1391 cut-off events. [2023-08-25 18:05:39,503 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:05:39,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1502 conditions, 1391 events. 166/1391 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 7546 event pairs, 23 based on Foata normal form. 0/1175 useless extension candidates. Maximal degree in co-relation 956. Up to 80 conditions per place. [2023-08-25 18:05:39,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 260 places, 285 transitions, 630 flow [2023-08-25 18:05:39,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 260 places, 285 transitions, 630 flow [2023-08-25 18:05:39,528 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:05:39,528 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 260 places, 285 transitions, 630 flow [2023-08-25 18:05:39,529 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 260 places, 285 transitions, 630 flow [2023-08-25 18:05:39,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 285 transitions, 630 flow [2023-08-25 18:05:39,701 INFO L124 PetriNetUnfolderBase]: 166/1391 cut-off events. [2023-08-25 18:05:39,701 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:05:39,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1502 conditions, 1391 events. 166/1391 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 7546 event pairs, 23 based on Foata normal form. 0/1175 useless extension candidates. Maximal degree in co-relation 956. Up to 80 conditions per place. [2023-08-25 18:05:39,755 INFO L119 LiptonReduction]: Number of co-enabled transitions 44550 [2023-08-25 18:05:43,105 INFO L134 LiptonReduction]: Checked pairs total: 109145 [2023-08-25 18:05:43,105 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-08-25 18:05:43,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:05:43,111 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:05:43,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:05:43,129 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:05:43,129 INFO L124 PetriNetUnfolderBase]: 56/267 cut-off events. [2023-08-25 18:05:43,129 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-25 18:05:43,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:05:43,130 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:05:43,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:05:43,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:05:43,130 INFO L85 PathProgramCache]: Analyzing trace with hash -965721714, now seen corresponding path program 1 times [2023-08-25 18:05:43,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:05:43,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486698079] [2023-08-25 18:05:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:05:43,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:05:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:43,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:05:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:43,224 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:05:43,225 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:05:43,225 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:05:43,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 18:05:43,225 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:05:43,226 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:05:43,226 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:05:43,226 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-25 18:05:43,249 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-25 18:05:43,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 286 places, 314 transitions, 706 flow [2023-08-25 18:05:43,596 INFO L124 PetriNetUnfolderBase]: 293/2255 cut-off events. [2023-08-25 18:05:43,596 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:05:43,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2487 conditions, 2255 events. 293/2255 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 14369 event pairs, 72 based on Foata normal form. 0/1922 useless extension candidates. Maximal degree in co-relation 1490. Up to 192 conditions per place. [2023-08-25 18:05:43,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 286 places, 314 transitions, 706 flow [2023-08-25 18:05:43,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 286 places, 314 transitions, 706 flow [2023-08-25 18:05:43,645 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:05:43,645 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 286 places, 314 transitions, 706 flow [2023-08-25 18:05:43,646 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 286 places, 314 transitions, 706 flow [2023-08-25 18:05:43,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 286 places, 314 transitions, 706 flow [2023-08-25 18:05:44,013 INFO L124 PetriNetUnfolderBase]: 293/2255 cut-off events. [2023-08-25 18:05:44,014 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:05:44,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2487 conditions, 2255 events. 293/2255 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 14369 event pairs, 72 based on Foata normal form. 0/1922 useless extension candidates. Maximal degree in co-relation 1490. Up to 192 conditions per place. [2023-08-25 18:05:44,110 INFO L119 LiptonReduction]: Number of co-enabled transitions 58320 [2023-08-25 18:05:47,871 INFO L134 LiptonReduction]: Checked pairs total: 153267 [2023-08-25 18:05:47,871 INFO L136 LiptonReduction]: Total number of compositions: 261 [2023-08-25 18:05:47,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:05:47,873 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:05:47,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:05:47,895 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:05:47,896 INFO L124 PetriNetUnfolderBase]: 77/349 cut-off events. [2023-08-25 18:05:47,896 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-25 18:05:47,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:05:47,896 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:05:47,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:05:47,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:05:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash -430248441, now seen corresponding path program 1 times [2023-08-25 18:05:47,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:05:47,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138448605] [2023-08-25 18:05:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:05:47,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:05:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:47,918 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:05:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:47,938 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:05:47,938 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:05:47,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:05:47,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-25 18:05:47,938 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:05:47,939 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:05:47,939 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:05:47,939 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-25 18:05:47,964 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-25 18:05:47,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 312 places, 343 transitions, 784 flow [2023-08-25 18:05:48,550 INFO L124 PetriNetUnfolderBase]: 564/3903 cut-off events. [2023-08-25 18:05:48,551 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:05:48,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4401 conditions, 3903 events. 564/3903 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 29234 event pairs, 201 based on Foata normal form. 0/3357 useless extension candidates. Maximal degree in co-relation 2473. Up to 448 conditions per place. [2023-08-25 18:05:48,592 INFO L82 GeneralOperation]: Start removeDead. Operand has 312 places, 343 transitions, 784 flow [2023-08-25 18:05:48,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 312 places, 343 transitions, 784 flow [2023-08-25 18:05:48,615 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:05:48,615 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 312 places, 343 transitions, 784 flow [2023-08-25 18:05:48,616 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 312 places, 343 transitions, 784 flow [2023-08-25 18:05:48,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 312 places, 343 transitions, 784 flow [2023-08-25 18:05:49,244 INFO L124 PetriNetUnfolderBase]: 564/3903 cut-off events. [2023-08-25 18:05:49,245 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:05:49,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4401 conditions, 3903 events. 564/3903 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 29234 event pairs, 201 based on Foata normal form. 0/3357 useless extension candidates. Maximal degree in co-relation 2473. Up to 448 conditions per place. [2023-08-25 18:05:49,424 INFO L119 LiptonReduction]: Number of co-enabled transitions 73710 [2023-08-25 18:05:53,182 INFO L134 LiptonReduction]: Checked pairs total: 199970 [2023-08-25 18:05:53,182 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-08-25 18:05:53,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:05:53,184 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:05:53,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:05:53,215 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:05:53,216 INFO L124 PetriNetUnfolderBase]: 102/458 cut-off events. [2023-08-25 18:05:53,216 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-25 18:05:53,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:05:53,216 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:05:53,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:05:53,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:05:53,217 INFO L85 PathProgramCache]: Analyzing trace with hash 763616566, now seen corresponding path program 1 times [2023-08-25 18:05:53,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:05:53,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198156811] [2023-08-25 18:05:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:05:53,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:05:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:53,251 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:05:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:05:53,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:05:53,285 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:05:53,285 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:05:53,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-25 18:05:53,286 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:05:53,286 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:05:53,286 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:05:53,286 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-25 18:05:53,317 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-25 18:05:53,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 372 transitions, 864 flow [2023-08-25 18:05:54,407 INFO L124 PetriNetUnfolderBase]: 1155/7151 cut-off events. [2023-08-25 18:05:54,407 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:05:54,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8236 conditions, 7151 events. 1155/7151 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 63114 event pairs, 522 based on Foata normal form. 0/6200 useless extension candidates. Maximal degree in co-relation 4385. Up to 1024 conditions per place. [2023-08-25 18:05:54,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 338 places, 372 transitions, 864 flow [2023-08-25 18:05:54,538 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 338 places, 372 transitions, 864 flow [2023-08-25 18:05:54,539 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:05:54,539 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 338 places, 372 transitions, 864 flow [2023-08-25 18:05:54,539 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 338 places, 372 transitions, 864 flow [2023-08-25 18:05:54,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 372 transitions, 864 flow [2023-08-25 18:05:55,659 INFO L124 PetriNetUnfolderBase]: 1155/7151 cut-off events. [2023-08-25 18:05:55,659 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:05:55,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8236 conditions, 7151 events. 1155/7151 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 63114 event pairs, 522 based on Foata normal form. 0/6200 useless extension candidates. Maximal degree in co-relation 4385. Up to 1024 conditions per place. [2023-08-25 18:05:56,066 INFO L119 LiptonReduction]: Number of co-enabled transitions 90720 [2023-08-25 18:06:00,349 INFO L134 LiptonReduction]: Checked pairs total: 256112 [2023-08-25 18:06:00,349 INFO L136 LiptonReduction]: Total number of compositions: 318 [2023-08-25 18:06:00,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:06:00,351 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:06:00,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:06:00,410 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:06:00,411 INFO L124 PetriNetUnfolderBase]: 130/579 cut-off events. [2023-08-25 18:06:00,411 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-25 18:06:00,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:06:00,411 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:06:00,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:06:00,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:06:00,412 INFO L85 PathProgramCache]: Analyzing trace with hash 20226107, now seen corresponding path program 1 times [2023-08-25 18:06:00,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:06:00,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383806549] [2023-08-25 18:06:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:06:00,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:06:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:06:00,438 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:06:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:06:00,460 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:06:00,460 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:06:00,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:06:00,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 18:06:00,461 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:06:00,461 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:06:00,461 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:06:00,462 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-25 18:06:00,494 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-25 18:06:00,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 364 places, 401 transitions, 946 flow [2023-08-25 18:06:03,206 INFO L124 PetriNetUnfolderBase]: 2450/13663 cut-off events. [2023-08-25 18:06:03,207 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:06:03,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16040 conditions, 13663 events. 2450/13663 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 138377 event pairs, 1291 based on Foata normal form. 0/11923 useless extension candidates. Maximal degree in co-relation 8218. Up to 2304 conditions per place. [2023-08-25 18:06:03,391 INFO L82 GeneralOperation]: Start removeDead. Operand has 364 places, 401 transitions, 946 flow [2023-08-25 18:06:03,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 364 places, 401 transitions, 946 flow [2023-08-25 18:06:03,498 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:06:03,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 364 places, 401 transitions, 946 flow [2023-08-25 18:06:03,498 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 364 places, 401 transitions, 946 flow [2023-08-25 18:06:03,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 364 places, 401 transitions, 946 flow [2023-08-25 18:06:06,045 INFO L124 PetriNetUnfolderBase]: 2450/13663 cut-off events. [2023-08-25 18:06:06,046 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:06:06,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16040 conditions, 13663 events. 2450/13663 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 138377 event pairs, 1291 based on Foata normal form. 0/11923 useless extension candidates. Maximal degree in co-relation 8218. Up to 2304 conditions per place. [2023-08-25 18:06:06,841 INFO L119 LiptonReduction]: Number of co-enabled transitions 109350 [2023-08-25 18:06:11,226 INFO L134 LiptonReduction]: Checked pairs total: 318975 [2023-08-25 18:06:11,226 INFO L136 LiptonReduction]: Total number of compositions: 336 [2023-08-25 18:06:11,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:06:11,228 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:06:11,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:06:11,285 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:06:11,286 INFO L124 PetriNetUnfolderBase]: 179/765 cut-off events. [2023-08-25 18:06:11,286 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-08-25 18:06:11,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:06:11,286 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:06:11,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:06:11,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:06:11,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1844301130, now seen corresponding path program 1 times [2023-08-25 18:06:11,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:06:11,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94033194] [2023-08-25 18:06:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:06:11,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:06:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:06:11,310 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:06:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:06:11,332 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:06:11,332 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:06:11,332 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:06:11,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-25 18:06:11,333 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:06:11,333 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:06:11,333 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:06:11,333 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-25 18:06:11,362 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-25 18:06:11,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 390 places, 430 transitions, 1030 flow [2023-08-25 18:06:16,812 INFO L124 PetriNetUnfolderBase]: 5281/26831 cut-off events. [2023-08-25 18:06:16,812 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:06:17,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32037 conditions, 26831 events. 5281/26831 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 309109 event pairs, 3084 based on Foata normal form. 0/23534 useless extension candidates. Maximal degree in co-relation 16020. Up to 5120 conditions per place. [2023-08-25 18:06:17,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 390 places, 430 transitions, 1030 flow [2023-08-25 18:06:17,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 390 places, 430 transitions, 1030 flow [2023-08-25 18:06:17,794 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:06:17,794 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 390 places, 430 transitions, 1030 flow [2023-08-25 18:06:17,794 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 390 places, 430 transitions, 1030 flow [2023-08-25 18:06:17,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 390 places, 430 transitions, 1030 flow [2023-08-25 18:06:23,397 INFO L124 PetriNetUnfolderBase]: 5281/26831 cut-off events. [2023-08-25 18:06:23,397 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:06:24,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32037 conditions, 26831 events. 5281/26831 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 309109 event pairs, 3084 based on Foata normal form. 0/23534 useless extension candidates. Maximal degree in co-relation 16020. Up to 5120 conditions per place. [2023-08-25 18:06:25,308 INFO L119 LiptonReduction]: Number of co-enabled transitions 129600 [2023-08-25 18:06:29,779 INFO L134 LiptonReduction]: Checked pairs total: 335504 [2023-08-25 18:06:29,780 INFO L136 LiptonReduction]: Total number of compositions: 357 [2023-08-25 18:06:29,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:06:29,782 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:06:29,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:06:29,886 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:06:29,886 INFO L124 PetriNetUnfolderBase]: 255/1029 cut-off events. [2023-08-25 18:06:29,886 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2023-08-25 18:06:29,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:06:29,887 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:06:29,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:06:29,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:06:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1932824872, now seen corresponding path program 1 times [2023-08-25 18:06:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:06:29,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804169226] [2023-08-25 18:06:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:06:29,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:06:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:06:29,922 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:06:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:06:29,947 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:06:29,948 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:06:29,948 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:06:29,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-25 18:06:29,948 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:06:29,949 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:06:29,949 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:06:29,949 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-25 18:06:29,982 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-25 18:06:29,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 416 places, 459 transitions, 1116 flow [2023-08-25 18:06:42,697 INFO L124 PetriNetUnfolderBase]: 11440/53567 cut-off events. [2023-08-25 18:06:42,697 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:06:45,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64931 conditions, 53567 events. 11440/53567 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 688365 event pairs, 7181 based on Foata normal form. 0/47177 useless extension candidates. Maximal degree in co-relation 32015. Up to 11264 conditions per place. [2023-08-25 18:06:45,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 416 places, 459 transitions, 1116 flow [2023-08-25 18:06:45,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 416 places, 459 transitions, 1116 flow [2023-08-25 18:06:45,618 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:06:45,618 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 416 places, 459 transitions, 1116 flow [2023-08-25 18:06:45,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 416 places, 459 transitions, 1116 flow [2023-08-25 18:06:45,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 416 places, 459 transitions, 1116 flow [2023-08-25 18:06:57,986 INFO L124 PetriNetUnfolderBase]: 11440/53567 cut-off events. [2023-08-25 18:06:57,986 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:07:00,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64931 conditions, 53567 events. 11440/53567 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 688365 event pairs, 7181 based on Foata normal form. 0/47177 useless extension candidates. Maximal degree in co-relation 32015. Up to 11264 conditions per place. [2023-08-25 18:07:03,280 INFO L119 LiptonReduction]: Number of co-enabled transitions 151470 [2023-08-25 18:07:07,847 INFO L134 LiptonReduction]: Checked pairs total: 452653 [2023-08-25 18:07:07,847 INFO L136 LiptonReduction]: Total number of compositions: 392 [2023-08-25 18:07:07,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:07:07,849 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:07:07,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:07:07,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:07:07,957 INFO L124 PetriNetUnfolderBase]: 384/1429 cut-off events. [2023-08-25 18:07:07,957 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2023-08-25 18:07:07,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:07:07,957 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:07:07,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:07:07,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:07:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash 899822573, now seen corresponding path program 1 times [2023-08-25 18:07:07,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:07:07,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999578637] [2023-08-25 18:07:07,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:07:07,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:07:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:07:07,981 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:07:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:07:08,002 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:07:08,003 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:07:08,003 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:07:08,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-25 18:07:08,003 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:07:08,004 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:07:08,004 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:07:08,004 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-25 18:07:08,035 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-25 18:07:08,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 442 places, 488 transitions, 1204 flow [2023-08-25 18:07:33,574 INFO L124 PetriNetUnfolderBase]: 24767/107951 cut-off events. [2023-08-25 18:07:33,575 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:07:39,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132642 conditions, 107951 events. 24767/107951 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 1519843 event pairs, 16398 based on Foata normal form. 0/95396 useless extension candidates. Maximal degree in co-relation 64907. Up to 24576 conditions per place. [2023-08-25 18:07:39,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 442 places, 488 transitions, 1204 flow [2023-08-25 18:07:41,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 442 places, 488 transitions, 1204 flow [2023-08-25 18:07:41,151 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:07:41,151 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 442 places, 488 transitions, 1204 flow [2023-08-25 18:07:41,151 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 442 places, 488 transitions, 1204 flow [2023-08-25 18:07:41,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 442 places, 488 transitions, 1204 flow [2023-08-25 18:08:07,326 INFO L124 PetriNetUnfolderBase]: 24767/107951 cut-off events. [2023-08-25 18:08:07,326 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:08:13,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132642 conditions, 107951 events. 24767/107951 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 1519843 event pairs, 16398 based on Foata normal form. 0/95396 useless extension candidates. Maximal degree in co-relation 64907. Up to 24576 conditions per place. [2023-08-25 18:08:22,594 INFO L119 LiptonReduction]: Number of co-enabled transitions 174960 [2023-08-25 18:08:27,228 INFO L134 LiptonReduction]: Checked pairs total: 544106 [2023-08-25 18:08:27,228 INFO L136 LiptonReduction]: Total number of compositions: 411 [2023-08-25 18:08:27,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:27,230 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:27,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:27,472 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:27,473 INFO L124 PetriNetUnfolderBase]: 600/2046 cut-off events. [2023-08-25 18:08:27,473 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-25 18:08:27,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:27,473 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:27,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:27,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:27,473 INFO L85 PathProgramCache]: Analyzing trace with hash -41749114, now seen corresponding path program 1 times [2023-08-25 18:08:27,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:27,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926132216] [2023-08-25 18:08:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:27,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:27,499 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:27,520 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:27,520 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:27,520 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:27,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-25 18:08:27,521 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:27,524 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:27,524 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:27,524 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-25 18:08:27,570 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-25 18:08:27,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 468 places, 517 transitions, 1294 flow [2023-08-25 18:09:33,184 INFO L124 PetriNetUnfolderBase]: 53454/218655 cut-off events. [2023-08-25 18:09:33,185 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-25 18:09:45,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272034 conditions, 218655 events. 53454/218655 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 3164. Compared 3351842 event pairs, 36879 based on Foata normal form. 0/193791 useless extension candidates. Maximal degree in co-relation 132616. Up to 53248 conditions per place. [2023-08-25 18:09:45,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 468 places, 517 transitions, 1294 flow [2023-08-25 18:09:49,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 468 places, 517 transitions, 1294 flow [2023-08-25 18:09:49,707 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:49,707 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 468 places, 517 transitions, 1294 flow [2023-08-25 18:09:49,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 468 places, 517 transitions, 1294 flow [2023-08-25 18:09:49,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 468 places, 517 transitions, 1294 flow [2023-08-25 18:10:48,111 INFO L124 PetriNetUnfolderBase]: 53454/218655 cut-off events. [2023-08-25 18:10:48,111 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-25 18:11:00,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272034 conditions, 218655 events. 53454/218655 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 3164. Compared 3351842 event pairs, 36879 based on Foata normal form. 0/193791 useless extension candidates. Maximal degree in co-relation 132616. Up to 53248 conditions per place. [2023-08-25 18:11:25,595 INFO L119 LiptonReduction]: Number of co-enabled transitions 200070 [2023-08-25 18:11:31,352 INFO L134 LiptonReduction]: Checked pairs total: 567097 [2023-08-25 18:11:31,353 INFO L136 LiptonReduction]: Total number of compositions: 425 [2023-08-25 18:11:31,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:11:31,354 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;@1e983c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:11:31,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:11:31,679 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:11:31,680 INFO L124 PetriNetUnfolderBase]: 958/2990 cut-off events. [2023-08-25 18:11:31,680 INFO L125 PetriNetUnfolderBase]: For 1672/1672 co-relation queries the response was YES. [2023-08-25 18:11:31,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:11:31,680 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:11:31,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:11:31,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:11:31,681 INFO L85 PathProgramCache]: Analyzing trace with hash -461007885, now seen corresponding path program 1 times [2023-08-25 18:11:31,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:11:31,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416672627] [2023-08-25 18:11:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:11:31,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:11:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:31,730 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:11:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:31,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:11:31,762 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:11:31,762 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:11:31,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-25 18:11:31,762 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:11:31,763 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:11:31,763 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:11:31,763 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-25 18:11:31,823 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-08-25 18:11:31,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 494 places, 546 transitions, 1386 flow