/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_60-invariant_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 18:16:19,619 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 18:16:19,677 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 18:16:19,679 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 18:16:19,680 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 18:16:19,707 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 18:16:19,708 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 18:16:19,712 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 18:16:19,712 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 18:16:19,715 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 18:16:19,715 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 18:16:19,715 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 18:16:19,715 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 18:16:19,716 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 18:16:19,716 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 18:16:19,716 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 18:16:19,716 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 18:16:19,717 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 18:16:19,717 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 18:16:19,717 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 18:16:19,717 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 18:16:19,717 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 18:16:19,717 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 18:16:19,718 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 18:16:19,718 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 18:16:19,718 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 18:16:19,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 18:16:19,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:16:19,718 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 18:16:19,719 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 18:16:19,719 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 18:16:19,719 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 18:16:19,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 18:16:19,720 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 18:16:19,720 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 18:16:19,720 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 18:16:19,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 18:16:19,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 18:16:19,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 18:16:19,962 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 18:16:19,964 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 18:16:19,965 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-25 18:16:20,923 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 18:16:21,112 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 18:16:21,113 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-25 18:16:21,124 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdcf7e1b0/7aae7eb8ec00412abf85362f262f5007/FLAG538ff98c5 [2023-08-25 18:16:21,136 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdcf7e1b0/7aae7eb8ec00412abf85362f262f5007 [2023-08-25 18:16:21,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 18:16:21,140 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 18:16:21,141 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 18:16:21,141 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 18:16:21,143 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 18:16:21,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@730d860f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21, skipping insertion in model container [2023-08-25 18:16:21,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,177 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 18:16:21,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:16:21,377 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 18:16:21,401 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:16:21,403 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:16:21,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:16:21,462 INFO L206 MainTranslator]: Completed translation [2023-08-25 18:16:21,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21 WrapperNode [2023-08-25 18:16:21,462 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 18:16:21,463 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 18:16:21,463 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 18:16:21,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 18:16:21,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,484 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,499 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 184 [2023-08-25 18:16:21,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 18:16:21,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 18:16:21,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 18:16:21,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 18:16:21,505 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,507 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,508 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,512 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,515 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,516 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,516 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,518 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 18:16:21,518 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 18:16:21,519 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 18:16:21,519 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 18:16:21,519 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (1/1) ... [2023-08-25 18:16:21,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:16:21,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:16:21,543 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 18:16:21,546 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 18:16:21,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-25 18:16:21,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 18:16:21,568 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-25 18:16:21,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 18:16:21,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 18:16:21,569 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-25 18:16:21,569 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-25 18:16:21,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 18:16:21,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 18:16:21,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 18:16:21,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 18:16:21,570 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 18:16:21,655 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 18:16:21,656 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 18:16:21,856 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 18:16:21,861 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 18:16:21,861 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-08-25 18:16:21,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:16:21 BoogieIcfgContainer [2023-08-25 18:16:21,863 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 18:16:21,864 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 18:16:21,864 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 18:16:21,866 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 18:16:21,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:16:21" (1/3) ... [2023-08-25 18:16:21,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a351aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:16:21, skipping insertion in model container [2023-08-25 18:16:21,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:16:21" (2/3) ... [2023-08-25 18:16:21,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a351aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:16:21, skipping insertion in model container [2023-08-25 18:16:21,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:16:21" (3/3) ... [2023-08-25 18:16:21,868 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2023-08-25 18:16:21,879 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 18:16:21,879 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-25 18:16:21,879 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 18:16:21,932 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-25 18:16:21,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 195 transitions, 398 flow [2023-08-25 18:16:22,053 INFO L124 PetriNetUnfolderBase]: 36/281 cut-off events. [2023-08-25 18:16:22,053 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-25 18:16:22,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 281 events. 36/281 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1207 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 162. Up to 6 conditions per place. [2023-08-25 18:16:22,064 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 195 transitions, 398 flow [2023-08-25 18:16:22,070 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 190 transitions, 385 flow [2023-08-25 18:16:22,074 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:22,090 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 190 transitions, 385 flow [2023-08-25 18:16:22,092 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 190 transitions, 385 flow [2023-08-25 18:16:22,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 190 transitions, 385 flow [2023-08-25 18:16:22,135 INFO L124 PetriNetUnfolderBase]: 35/276 cut-off events. [2023-08-25 18:16:22,135 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:16:22,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 276 events. 35/276 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1187 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 162. Up to 6 conditions per place. [2023-08-25 18:16:22,144 INFO L119 LiptonReduction]: Number of co-enabled transitions 13064 [2023-08-25 18:16:24,419 INFO L134 LiptonReduction]: Checked pairs total: 47752 [2023-08-25 18:16:24,419 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-25 18:16:24,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:16:24,432 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;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:16:24,432 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:16:24,435 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:16:24,435 INFO L124 PetriNetUnfolderBase]: 2/29 cut-off events. [2023-08-25 18:16:24,435 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:16:24,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:16:24,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-25 18:16:24,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:16:24,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:16:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash -232257291, now seen corresponding path program 1 times [2023-08-25 18:16:24,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:16:24,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349640272] [2023-08-25 18:16:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:16:24,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:16:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:24,516 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:16:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:24,543 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:16:24,544 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:16:24,545 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:16:24,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 18:16:24,546 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:16:24,548 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:16:24,548 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:16:24,548 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 18:16:24,565 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-25 18:16:24,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 268 transitions, 554 flow [2023-08-25 18:16:24,609 INFO L124 PetriNetUnfolderBase]: 62/471 cut-off events. [2023-08-25 18:16:24,609 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:16:24,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 471 events. 62/471 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2253 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 283. Up to 9 conditions per place. [2023-08-25 18:16:24,612 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 268 transitions, 554 flow [2023-08-25 18:16:24,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 268 transitions, 554 flow [2023-08-25 18:16:24,615 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:24,615 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 268 transitions, 554 flow [2023-08-25 18:16:24,615 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 268 transitions, 554 flow [2023-08-25 18:16:24,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 268 transitions, 554 flow [2023-08-25 18:16:24,679 INFO L124 PetriNetUnfolderBase]: 62/471 cut-off events. [2023-08-25 18:16:24,679 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:16:24,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 471 events. 62/471 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2253 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 283. Up to 9 conditions per place. [2023-08-25 18:16:24,694 INFO L119 LiptonReduction]: Number of co-enabled transitions 37772 [2023-08-25 18:16:26,906 INFO L134 LiptonReduction]: Checked pairs total: 154902 [2023-08-25 18:16:26,906 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-25 18:16:26,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:16:26,909 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;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:16:26,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:16:26,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:16:26,914 INFO L124 PetriNetUnfolderBase]: 23/128 cut-off events. [2023-08-25 18:16:26,914 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-25 18:16:26,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:16:26,914 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-25 18:16:26,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:16:26,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:16:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1846368237, now seen corresponding path program 1 times [2023-08-25 18:16:26,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:16:26,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807773781] [2023-08-25 18:16:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:16:26,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:16:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:26,933 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:16:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:26,959 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:16:26,960 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:16:26,960 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:16:26,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-25 18:16:26,960 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:16:26,961 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:16:26,961 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:16:26,961 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 18:16:26,980 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-25 18:16:26,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 341 transitions, 712 flow [2023-08-25 18:16:27,069 INFO L124 PetriNetUnfolderBase]: 93/706 cut-off events. [2023-08-25 18:16:27,069 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:16:27,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 706 events. 93/706 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3503 event pairs, 1 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 479. Up to 16 conditions per place. [2023-08-25 18:16:27,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 300 places, 341 transitions, 712 flow [2023-08-25 18:16:27,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 300 places, 341 transitions, 712 flow [2023-08-25 18:16:27,079 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:27,079 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 300 places, 341 transitions, 712 flow [2023-08-25 18:16:27,079 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 300 places, 341 transitions, 712 flow [2023-08-25 18:16:27,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 341 transitions, 712 flow [2023-08-25 18:16:27,141 INFO L124 PetriNetUnfolderBase]: 93/706 cut-off events. [2023-08-25 18:16:27,141 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:16:27,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 706 events. 93/706 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3503 event pairs, 1 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 479. Up to 16 conditions per place. [2023-08-25 18:16:27,165 INFO L119 LiptonReduction]: Number of co-enabled transitions 72420 [2023-08-25 18:16:29,729 INFO L134 LiptonReduction]: Checked pairs total: 353184 [2023-08-25 18:16:29,729 INFO L136 LiptonReduction]: Total number of compositions: 210 [2023-08-25 18:16:29,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:16:29,734 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;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:16:29,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:16:29,746 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:16:29,746 INFO L124 PetriNetUnfolderBase]: 32/205 cut-off events. [2023-08-25 18:16:29,747 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-25 18:16:29,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:16:29,747 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-25 18:16:29,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:16:29,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:16:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1066192954, now seen corresponding path program 1 times [2023-08-25 18:16:29,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:16:29,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473046954] [2023-08-25 18:16:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:16:29,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:16:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:29,780 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:16:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:29,794 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:16:29,794 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:16:29,794 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:16:29,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-25 18:16:29,794 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:16:29,795 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:16:29,795 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:16:29,795 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-25 18:16:29,816 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-25 18:16:29,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 363 places, 414 transitions, 872 flow [2023-08-25 18:16:29,963 INFO L124 PetriNetUnfolderBase]: 136/1033 cut-off events. [2023-08-25 18:16:29,964 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:16:29,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1088 conditions, 1033 events. 136/1033 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5396 event pairs, 6 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 726. Up to 32 conditions per place. [2023-08-25 18:16:29,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 363 places, 414 transitions, 872 flow [2023-08-25 18:16:29,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 363 places, 414 transitions, 872 flow [2023-08-25 18:16:29,993 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:29,993 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 363 places, 414 transitions, 872 flow [2023-08-25 18:16:29,993 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 363 places, 414 transitions, 872 flow [2023-08-25 18:16:29,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 363 places, 414 transitions, 872 flow [2023-08-25 18:16:30,115 INFO L124 PetriNetUnfolderBase]: 136/1033 cut-off events. [2023-08-25 18:16:30,116 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:16:30,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1088 conditions, 1033 events. 136/1033 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5396 event pairs, 6 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 726. Up to 32 conditions per place. [2023-08-25 18:16:30,169 INFO L119 LiptonReduction]: Number of co-enabled transitions 117576 [2023-08-25 18:16:32,834 INFO L134 LiptonReduction]: Checked pairs total: 521269 [2023-08-25 18:16:32,834 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-08-25 18:16:32,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:16:32,836 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;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:16:32,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:16:32,852 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:16:32,852 INFO L124 PetriNetUnfolderBase]: 60/318 cut-off events. [2023-08-25 18:16:32,852 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-25 18:16:32,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:16:32,853 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-25 18:16:32,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:16:32,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:16:32,853 INFO L85 PathProgramCache]: Analyzing trace with hash -624975464, now seen corresponding path program 1 times [2023-08-25 18:16:32,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:16:32,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812165449] [2023-08-25 18:16:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:16:32,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:16:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:32,877 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:16:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:32,902 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:16:32,902 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:16:32,903 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:16:32,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 18:16:32,903 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:16:32,903 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:16:32,903 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:16:32,903 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-25 18:16:32,931 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-25 18:16:32,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 426 places, 487 transitions, 1034 flow [2023-08-25 18:16:33,154 INFO L124 PetriNetUnfolderBase]: 207/1548 cut-off events. [2023-08-25 18:16:33,154 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:16:33,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 1548 events. 207/1548 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 8765 event pairs, 23 based on Foata normal form. 0/1254 useless extension candidates. Maximal degree in co-relation 1078. Up to 80 conditions per place. [2023-08-25 18:16:33,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 426 places, 487 transitions, 1034 flow [2023-08-25 18:16:33,192 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 426 places, 487 transitions, 1034 flow [2023-08-25 18:16:33,192 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:33,192 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 426 places, 487 transitions, 1034 flow [2023-08-25 18:16:33,192 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 426 places, 487 transitions, 1034 flow [2023-08-25 18:16:33,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 426 places, 487 transitions, 1034 flow [2023-08-25 18:16:33,422 INFO L124 PetriNetUnfolderBase]: 207/1548 cut-off events. [2023-08-25 18:16:33,422 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:16:33,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 1548 events. 207/1548 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 8765 event pairs, 23 based on Foata normal form. 0/1254 useless extension candidates. Maximal degree in co-relation 1078. Up to 80 conditions per place. [2023-08-25 18:16:33,502 INFO L119 LiptonReduction]: Number of co-enabled transitions 173240 [2023-08-25 18:16:36,302 INFO L134 LiptonReduction]: Checked pairs total: 662933 [2023-08-25 18:16:36,303 INFO L136 LiptonReduction]: Total number of compositions: 289 [2023-08-25 18:16:36,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:16:36,304 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;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:16:36,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:16:36,329 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:16:36,329 INFO L124 PetriNetUnfolderBase]: 78/418 cut-off events. [2023-08-25 18:16:36,329 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-08-25 18:16:36,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:16:36,330 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:16:36,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:16:36,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:16:36,330 INFO L85 PathProgramCache]: Analyzing trace with hash 655674402, now seen corresponding path program 1 times [2023-08-25 18:16:36,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:16:36,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671369108] [2023-08-25 18:16:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:16:36,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:16:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:36,354 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:16:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:36,382 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:16:36,383 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:16:36,383 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:16:36,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 18:16:36,383 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:16:36,383 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:16:36,383 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:16:36,383 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-25 18:16:36,409 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-25 18:16:36,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 560 transitions, 1198 flow [2023-08-25 18:16:36,816 INFO L124 PetriNetUnfolderBase]: 342/2447 cut-off events. [2023-08-25 18:16:36,817 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:16:36,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2679 conditions, 2447 events. 342/2447 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 15812 event pairs, 72 based on Foata normal form. 0/2021 useless extension candidates. Maximal degree in co-relation 1647. Up to 192 conditions per place. [2023-08-25 18:16:36,870 INFO L82 GeneralOperation]: Start removeDead. Operand has 489 places, 560 transitions, 1198 flow [2023-08-25 18:16:36,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 489 places, 560 transitions, 1198 flow [2023-08-25 18:16:36,895 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:36,896 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 489 places, 560 transitions, 1198 flow [2023-08-25 18:16:36,896 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 489 places, 560 transitions, 1198 flow [2023-08-25 18:16:36,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 560 transitions, 1198 flow [2023-08-25 18:16:37,341 INFO L124 PetriNetUnfolderBase]: 342/2447 cut-off events. [2023-08-25 18:16:37,341 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:16:37,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2679 conditions, 2447 events. 342/2447 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 15812 event pairs, 72 based on Foata normal form. 0/2021 useless extension candidates. Maximal degree in co-relation 1647. Up to 192 conditions per place. [2023-08-25 18:16:37,541 INFO L119 LiptonReduction]: Number of co-enabled transitions 239412 [2023-08-25 18:16:40,467 INFO L134 LiptonReduction]: Checked pairs total: 1089914 [2023-08-25 18:16:40,468 INFO L136 LiptonReduction]: Total number of compositions: 335 [2023-08-25 18:16:40,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:16:40,469 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;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:16:40,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:16:40,506 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:16:40,506 INFO L124 PetriNetUnfolderBase]: 94/518 cut-off events. [2023-08-25 18:16:40,506 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-08-25 18:16:40,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:16:40,506 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:16:40,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:16:40,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:16:40,506 INFO L85 PathProgramCache]: Analyzing trace with hash 518690356, now seen corresponding path program 1 times [2023-08-25 18:16:40,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:16:40,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578984937] [2023-08-25 18:16:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:16:40,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:16:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:40,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:16:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:40,534 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:16:40,534 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:16:40,534 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:16:40,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-25 18:16:40,534 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:16:40,534 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:16:40,534 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:16:40,534 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-25 18:16:40,556 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-25 18:16:40,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 552 places, 633 transitions, 1364 flow [2023-08-25 18:16:41,376 INFO L124 PetriNetUnfolderBase]: 621/4130 cut-off events. [2023-08-25 18:16:41,376 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:16:41,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4628 conditions, 4130 events. 621/4130 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 30841 event pairs, 201 based on Foata normal form. 0/3476 useless extension candidates. Maximal degree in co-relation 2665. Up to 448 conditions per place. [2023-08-25 18:16:41,463 INFO L82 GeneralOperation]: Start removeDead. Operand has 552 places, 633 transitions, 1364 flow [2023-08-25 18:16:41,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 552 places, 633 transitions, 1364 flow [2023-08-25 18:16:41,504 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:41,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 552 places, 633 transitions, 1364 flow [2023-08-25 18:16:41,504 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 552 places, 633 transitions, 1364 flow [2023-08-25 18:16:41,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 552 places, 633 transitions, 1364 flow [2023-08-25 18:16:42,299 INFO L124 PetriNetUnfolderBase]: 621/4130 cut-off events. [2023-08-25 18:16:42,300 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:16:42,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4628 conditions, 4130 events. 621/4130 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 30841 event pairs, 201 based on Foata normal form. 0/3476 useless extension candidates. Maximal degree in co-relation 2665. Up to 448 conditions per place. [2023-08-25 18:16:42,771 INFO L119 LiptonReduction]: Number of co-enabled transitions 316092 [2023-08-25 18:16:46,039 INFO L134 LiptonReduction]: Checked pairs total: 1474058 [2023-08-25 18:16:46,039 INFO L136 LiptonReduction]: Total number of compositions: 365 [2023-08-25 18:16:46,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:16:46,040 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:16:46,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:16:46,102 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:16:46,102 INFO L124 PetriNetUnfolderBase]: 132/666 cut-off events. [2023-08-25 18:16:46,102 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-25 18:16:46,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:16:46,102 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:16:46,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:16:46,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:16:46,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2034123436, now seen corresponding path program 1 times [2023-08-25 18:16:46,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:16:46,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981893749] [2023-08-25 18:16:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:16:46,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:16:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:46,136 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:16:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:46,156 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:16:46,156 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:16:46,156 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:16:46,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-25 18:16:46,156 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:16:46,157 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:16:46,157 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:16:46,157 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-25 18:16:46,183 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-25 18:16:46,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 615 places, 706 transitions, 1532 flow [2023-08-25 18:16:48,146 INFO L124 PetriNetUnfolderBase]: 1220/7413 cut-off events. [2023-08-25 18:16:48,146 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:16:48,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8498 conditions, 7413 events. 1220/7413 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 64691 event pairs, 522 based on Foata normal form. 0/6339 useless extension candidates. Maximal degree in co-relation 4612. Up to 1024 conditions per place. [2023-08-25 18:16:48,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 615 places, 706 transitions, 1532 flow [2023-08-25 18:16:48,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 615 places, 706 transitions, 1532 flow [2023-08-25 18:16:48,348 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:48,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 615 places, 706 transitions, 1532 flow [2023-08-25 18:16:48,349 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 615 places, 706 transitions, 1532 flow [2023-08-25 18:16:48,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 615 places, 706 transitions, 1532 flow [2023-08-25 18:16:50,269 INFO L124 PetriNetUnfolderBase]: 1220/7413 cut-off events. [2023-08-25 18:16:50,269 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:16:50,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8498 conditions, 7413 events. 1220/7413 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 64691 event pairs, 522 based on Foata normal form. 0/6339 useless extension candidates. Maximal degree in co-relation 4612. Up to 1024 conditions per place. [2023-08-25 18:16:50,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 403280 [2023-08-25 18:16:54,698 INFO L134 LiptonReduction]: Checked pairs total: 2135888 [2023-08-25 18:16:54,698 INFO L136 LiptonReduction]: Total number of compositions: 416 [2023-08-25 18:16:54,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:16:54,700 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;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:16:54,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:16:54,778 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:16:54,778 INFO L124 PetriNetUnfolderBase]: 148/776 cut-off events. [2023-08-25 18:16:54,778 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-08-25 18:16:54,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:16:54,778 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:16:54,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:16:54,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:16:54,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1162058560, now seen corresponding path program 1 times [2023-08-25 18:16:54,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:16:54,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303813293] [2023-08-25 18:16:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:16:54,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:16:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:54,793 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:16:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:54,806 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:16:54,806 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:16:54,806 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:16:54,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 18:16:54,806 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:16:54,806 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:16:54,806 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:16:54,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-25 18:16:54,834 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-25 18:16:54,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 678 places, 779 transitions, 1702 flow [2023-08-25 18:16:59,100 INFO L124 PetriNetUnfolderBase]: 2523/13960 cut-off events. [2023-08-25 18:16:59,101 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:16:59,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16337 conditions, 13960 events. 2523/13960 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 140476 event pairs, 1291 based on Foata normal form. 0/12082 useless extension candidates. Maximal degree in co-relation 8480. Up to 2304 conditions per place. [2023-08-25 18:16:59,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 678 places, 779 transitions, 1702 flow [2023-08-25 18:16:59,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 678 places, 779 transitions, 1702 flow [2023-08-25 18:16:59,558 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:59,559 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 678 places, 779 transitions, 1702 flow [2023-08-25 18:16:59,559 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 678 places, 779 transitions, 1702 flow [2023-08-25 18:16:59,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 678 places, 779 transitions, 1702 flow [2023-08-25 18:17:03,711 INFO L124 PetriNetUnfolderBase]: 2523/13960 cut-off events. [2023-08-25 18:17:03,711 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:17:04,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16337 conditions, 13960 events. 2523/13960 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 140476 event pairs, 1291 based on Foata normal form. 0/12082 useless extension candidates. Maximal degree in co-relation 8480. Up to 2304 conditions per place. [2023-08-25 18:17:05,162 INFO L119 LiptonReduction]: Number of co-enabled transitions 500976 [2023-08-25 18:17:09,191 INFO L134 LiptonReduction]: Checked pairs total: 2367973 [2023-08-25 18:17:09,191 INFO L136 LiptonReduction]: Total number of compositions: 461 [2023-08-25 18:17:09,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:17:09,193 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;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:17:09,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:17:09,300 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:17:09,300 INFO L124 PetriNetUnfolderBase]: 205/974 cut-off events. [2023-08-25 18:17:09,300 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-08-25 18:17:09,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:17:09,301 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:17:09,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:17:09,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:17:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1671246895, now seen corresponding path program 1 times [2023-08-25 18:17:09,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:17:09,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115209907] [2023-08-25 18:17:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:17:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:17:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:17:09,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:17:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:17:09,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:17:09,331 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:17:09,331 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:17:09,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-25 18:17:09,331 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:17:09,332 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:17:09,332 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:17:09,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-25 18:17:09,364 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-25 18:17:09,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 741 places, 852 transitions, 1874 flow [2023-08-25 18:17:18,300 INFO L124 PetriNetUnfolderBase]: 5362/27163 cut-off events. [2023-08-25 18:17:18,301 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:17:18,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32369 conditions, 27163 events. 5362/27163 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 309729 event pairs, 3084 based on Foata normal form. 0/23713 useless extension candidates. Maximal degree in co-relation 16317. Up to 5120 conditions per place. [2023-08-25 18:17:18,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 741 places, 852 transitions, 1874 flow [2023-08-25 18:17:19,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 741 places, 852 transitions, 1874 flow [2023-08-25 18:17:19,583 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:17:19,584 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 741 places, 852 transitions, 1874 flow [2023-08-25 18:17:19,584 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 741 places, 852 transitions, 1874 flow [2023-08-25 18:17:19,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 741 places, 852 transitions, 1874 flow [2023-08-25 18:17:28,609 INFO L124 PetriNetUnfolderBase]: 5362/27163 cut-off events. [2023-08-25 18:17:28,611 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:17:29,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32369 conditions, 27163 events. 5362/27163 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 309729 event pairs, 3084 based on Foata normal form. 0/23713 useless extension candidates. Maximal degree in co-relation 16317. Up to 5120 conditions per place. [2023-08-25 18:17:31,840 INFO L119 LiptonReduction]: Number of co-enabled transitions 609180 [2023-08-25 18:17:35,901 INFO L134 LiptonReduction]: Checked pairs total: 2910445 [2023-08-25 18:17:35,901 INFO L136 LiptonReduction]: Total number of compositions: 497 [2023-08-25 18:17:35,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:17:35,903 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;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:17:35,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:17:36,051 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:17:36,052 INFO L124 PetriNetUnfolderBase]: 264/1188 cut-off events. [2023-08-25 18:17:36,052 INFO L125 PetriNetUnfolderBase]: For 371/371 co-relation queries the response was YES. [2023-08-25 18:17:36,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:17:36,052 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:17:36,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:17:36,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:17:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1120539189, now seen corresponding path program 1 times [2023-08-25 18:17:36,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:17:36,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278824170] [2023-08-25 18:17:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:17:36,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:17:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:17:36,074 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:17:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:17:36,092 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:17:36,092 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:17:36,092 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:17:36,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-25 18:17:36,092 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:17:36,093 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:17:36,093 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:17:36,093 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-25 18:17:36,142 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-25 18:17:36,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 804 places, 925 transitions, 2048 flow [2023-08-25 18:17:55,412 INFO L124 PetriNetUnfolderBase]: 11529/53934 cut-off events. [2023-08-25 18:17:55,413 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:17:57,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65298 conditions, 53934 events. 11529/53934 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 691950 event pairs, 7181 based on Foata normal form. 0/47376 useless extension candidates. Maximal degree in co-relation 32348. Up to 11264 conditions per place. [2023-08-25 18:17:57,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 804 places, 925 transitions, 2048 flow [2023-08-25 18:17:58,503 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 804 places, 925 transitions, 2048 flow [2023-08-25 18:17:58,503 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:17:58,503 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 804 places, 925 transitions, 2048 flow [2023-08-25 18:17:58,503 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 804 places, 925 transitions, 2048 flow [2023-08-25 18:17:58,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 804 places, 925 transitions, 2048 flow [2023-08-25 18:18:18,067 INFO L124 PetriNetUnfolderBase]: 11529/53934 cut-off events. [2023-08-25 18:18:18,067 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:18:19,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65298 conditions, 53934 events. 11529/53934 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 691950 event pairs, 7181 based on Foata normal form. 0/47376 useless extension candidates. Maximal degree in co-relation 32348. Up to 11264 conditions per place. [2023-08-25 18:18:25,374 INFO L119 LiptonReduction]: Number of co-enabled transitions 727892 [2023-08-25 18:18:29,766 INFO L134 LiptonReduction]: Checked pairs total: 3413846 [2023-08-25 18:18:29,766 INFO L136 LiptonReduction]: Total number of compositions: 537 [2023-08-25 18:18:29,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:18:29,767 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;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:18:29,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:18:29,974 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:18:29,974 INFO L124 PetriNetUnfolderBase]: 339/1447 cut-off events. [2023-08-25 18:18:29,974 INFO L125 PetriNetUnfolderBase]: For 535/535 co-relation queries the response was YES. [2023-08-25 18:18:29,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:18:29,974 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:18:29,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:18:29,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:18:29,974 INFO L85 PathProgramCache]: Analyzing trace with hash -72761158, now seen corresponding path program 1 times [2023-08-25 18:18:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:18:29,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603632081] [2023-08-25 18:18:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:18:29,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:18:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:18:29,994 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:18:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:18:30,008 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:18:30,008 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:18:30,008 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:18:30,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-25 18:18:30,008 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:18:30,009 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:18:30,009 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:18:30,009 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-25 18:18:30,043 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-25 18:18:30,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 867 places, 998 transitions, 2224 flow [2023-08-25 18:19:13,100 INFO L124 PetriNetUnfolderBase]: 24864/108353 cut-off events. [2023-08-25 18:19:13,101 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:19:22,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133044 conditions, 108353 events. 24864/108353 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 1517088 event pairs, 16398 based on Foata normal form. 0/95615 useless extension candidates. Maximal degree in co-relation 65277. Up to 24576 conditions per place. [2023-08-25 18:19:22,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 867 places, 998 transitions, 2224 flow [2023-08-25 18:19:24,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 867 places, 998 transitions, 2224 flow [2023-08-25 18:19:24,807 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:19:24,807 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 867 places, 998 transitions, 2224 flow [2023-08-25 18:19:24,807 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 867 places, 998 transitions, 2224 flow [2023-08-25 18:19:24,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 867 places, 998 transitions, 2224 flow [2023-08-25 18:20:08,661 INFO L124 PetriNetUnfolderBase]: 24864/108353 cut-off events. [2023-08-25 18:20:08,661 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:20:16,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133044 conditions, 108353 events. 24864/108353 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 1517088 event pairs, 16398 based on Foata normal form. 0/95615 useless extension candidates. Maximal degree in co-relation 65277. Up to 24576 conditions per place. [2023-08-25 18:20:31,040 INFO L119 LiptonReduction]: Number of co-enabled transitions 857112 [2023-08-25 18:20:35,997 INFO L134 LiptonReduction]: Checked pairs total: 4095456 [2023-08-25 18:20:35,997 INFO L136 LiptonReduction]: Total number of compositions: 579 [2023-08-25 18:20:35,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:20:35,999 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;@5dacc44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:20:35,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:20:36,284 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:20:36,284 INFO L124 PetriNetUnfolderBase]: 455/1798 cut-off events. [2023-08-25 18:20:36,284 INFO L125 PetriNetUnfolderBase]: For 763/763 co-relation queries the response was YES. [2023-08-25 18:20:36,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:20:36,285 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 18:20:36,285 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:20:36,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:20:36,285 INFO L85 PathProgramCache]: Analyzing trace with hash -177359413, now seen corresponding path program 1 times [2023-08-25 18:20:36,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:20:36,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329579150] [2023-08-25 18:20:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:20:36,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:20:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:20:36,303 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:20:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:20:36,318 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:20:36,318 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:20:36,318 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:20:36,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-25 18:20:36,319 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:20:36,319 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:20:36,319 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:20:36,319 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-25 18:20:36,360 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-25 18:20:36,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 930 places, 1071 transitions, 2402 flow