/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 06:45:18,024 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 06:45:18,112 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 06:45:18,117 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 06:45:18,118 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 06:45:18,149 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 06:45:18,150 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 06:45:18,151 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 06:45:18,151 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 06:45:18,155 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 06:45:18,155 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 06:45:18,155 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 06:45:18,155 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 06:45:18,157 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 06:45:18,157 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 06:45:18,157 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 06:45:18,157 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 06:45:18,157 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 06:45:18,158 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 06:45:18,158 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 06:45:18,158 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 06:45:18,159 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 06:45:18,159 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 06:45:18,159 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 06:45:18,160 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 06:45:18,160 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 06:45:18,160 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 06:45:18,160 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:45:18,161 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 06:45:18,161 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 06:45:18,162 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 06:45:18,162 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 06:45:18,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 06:45:18,162 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 06:45:18,162 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 06:45:18,163 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 06:45:18,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 06:45:18,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 06:45:18,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 06:45:18,517 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 06:45:18,517 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 06:45:18,518 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-08-24 06:45:19,730 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 06:45:19,973 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 06:45:19,973 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-08-24 06:45:19,994 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ce505f7c/a7525abb87d047d4a6dca232c03eb85d/FLAG3ea9924be [2023-08-24 06:45:20,019 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ce505f7c/a7525abb87d047d4a6dca232c03eb85d [2023-08-24 06:45:20,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 06:45:20,022 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 06:45:20,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 06:45:20,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 06:45:20,026 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 06:45:20,026 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,027 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a035004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20, skipping insertion in model container [2023-08-24 06:45:20,027 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,070 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 06:45:20,506 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i[41323,41336] [2023-08-24 06:45:20,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:45:20,558 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 06:45:20,584 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:45:20,585 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:45:20,591 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-24 06:45:20,608 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i[41323,41336] [2023-08-24 06:45:20,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:45:20,694 INFO L206 MainTranslator]: Completed translation [2023-08-24 06:45:20,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20 WrapperNode [2023-08-24 06:45:20,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 06:45:20,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 06:45:20,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 06:45:20,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 06:45:20,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,724 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,763 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 196 [2023-08-24 06:45:20,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 06:45:20,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 06:45:20,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 06:45:20,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 06:45:20,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,785 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,786 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,792 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,797 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,802 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,803 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 06:45:20,806 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 06:45:20,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 06:45:20,807 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 06:45:20,807 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (1/1) ... [2023-08-24 06:45:20,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:45:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:20,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 06:45:20,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 06:45:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 06:45:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 06:45:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 06:45:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 06:45:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 06:45:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 06:45:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 06:45:20,871 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 06:45:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 06:45:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 06:45:20,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 06:45:20,873 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 06:45:21,001 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 06:45:21,003 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 06:45:21,230 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 06:45:21,237 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 06:45:21,237 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-24 06:45:21,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:45:21 BoogieIcfgContainer [2023-08-24 06:45:21,239 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 06:45:21,242 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 06:45:21,242 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 06:45:21,245 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 06:45:21,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 06:45:20" (1/3) ... [2023-08-24 06:45:21,245 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696d9409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:45:21, skipping insertion in model container [2023-08-24 06:45:21,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:20" (2/3) ... [2023-08-24 06:45:21,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696d9409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:45:21, skipping insertion in model container [2023-08-24 06:45:21,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:45:21" (3/3) ... [2023-08-24 06:45:21,247 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2023-08-24 06:45:21,261 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 06:45:21,261 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 06:45:21,261 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 06:45:21,377 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 06:45:21,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 400 flow [2023-08-24 06:45:21,525 INFO L124 PetriNetUnfolderBase]: 45/268 cut-off events. [2023-08-24 06:45:21,525 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-24 06:45:21,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 268 events. 45/268 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 837 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-08-24 06:45:21,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 196 transitions, 400 flow [2023-08-24 06:45:21,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 191 transitions, 387 flow [2023-08-24 06:45:21,557 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:45:21,565 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 191 transitions, 387 flow [2023-08-24 06:45:21,569 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 191 transitions, 387 flow [2023-08-24 06:45:21,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 191 transitions, 387 flow [2023-08-24 06:45:21,615 INFO L124 PetriNetUnfolderBase]: 44/263 cut-off events. [2023-08-24 06:45:21,615 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:21,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 263 events. 44/263 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 800 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-08-24 06:45:21,623 INFO L119 LiptonReduction]: Number of co-enabled transitions 11076 [2023-08-24 06:45:24,418 INFO L134 LiptonReduction]: Checked pairs total: 18087 [2023-08-24 06:45:24,418 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-24 06:45:24,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:45:24,434 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;@7a9fc3c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:45:24,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:45:24,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:45:24,446 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2023-08-24 06:45:24,446 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:24,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:24,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-24 06:45:24,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:24,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash -995381996, now seen corresponding path program 1 times [2023-08-24 06:45:24,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:24,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065636150] [2023-08-24 06:45:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:24,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:24,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:24,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065636150] [2023-08-24 06:45:24,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065636150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:45:24,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:45:24,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:45:24,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106578040] [2023-08-24 06:45:24,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:45:24,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:45:24,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:45:24,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:45:24,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 06:45:24,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:24,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:24,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 06:45:24,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:24,893 INFO L124 PetriNetUnfolderBase]: 272/611 cut-off events. [2023-08-24 06:45:24,893 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:24,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 611 events. 272/611 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3026 event pairs, 238 based on Foata normal form. 118/638 useless extension candidates. Maximal degree in co-relation 1092. Up to 528 conditions per place. [2023-08-24 06:45:24,900 INFO L140 encePairwiseOnDemand]: 339/364 looper letters, 20 selfloop transitions, 2 changer transitions 18/45 dead transitions. [2023-08-24 06:45:24,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-08-24 06:45:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:45:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:45:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2023-08-24 06:45:24,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48534798534798534 [2023-08-24 06:45:24,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2023-08-24 06:45:24,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2023-08-24 06:45:24,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:24,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2023-08-24 06:45:24,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:24,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:24,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:24,936 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 530 transitions. [2023-08-24 06:45:24,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-08-24 06:45:24,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 06:45:24,940 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 69 flow [2023-08-24 06:45:24,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=47, PETRI_TRANSITIONS=27} [2023-08-24 06:45:24,944 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-24 06:45:24,945 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 69 flow [2023-08-24 06:45:24,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:24,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:24,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:24,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 06:45:24,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:24,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:24,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1047843948, now seen corresponding path program 1 times [2023-08-24 06:45:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:24,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573707029] [2023-08-24 06:45:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:24,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:25,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573707029] [2023-08-24 06:45:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573707029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022821349] [2023-08-24 06:45:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:25,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:25,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:25,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 06:45:25,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 06:45:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:25,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:45:25,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:25,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:25,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022821349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:25,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:25,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 06:45:25,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885826516] [2023-08-24 06:45:25,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:25,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 06:45:25,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:25,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 06:45:25,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 06:45:25,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 06:45:25,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 69 flow. Second operand has 6 states, 6 states have (on average 158.5) internal successors, (951), 6 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:25,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:25,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 06:45:25,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:25,233 INFO L124 PetriNetUnfolderBase]: 47/128 cut-off events. [2023-08-24 06:45:25,233 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:25,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 128 events. 47/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 42 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 243. Up to 108 conditions per place. [2023-08-24 06:45:25,234 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-08-24 06:45:25,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 131 flow [2023-08-24 06:45:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:45:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:45:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 970 transitions. [2023-08-24 06:45:25,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441391941391941 [2023-08-24 06:45:25,238 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 970 transitions. [2023-08-24 06:45:25,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 970 transitions. [2023-08-24 06:45:25,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:25,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 970 transitions. [2023-08-24 06:45:25,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.66666666666666) internal successors, (970), 6 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:25,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 364.0) internal successors, (2548), 7 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:25,252 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 364.0) internal successors, (2548), 7 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:25,253 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 69 flow. Second operand 6 states and 970 transitions. [2023-08-24 06:45:25,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 131 flow [2023-08-24 06:45:25,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 06:45:25,259 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 101 flow [2023-08-24 06:45:25,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-08-24 06:45:25,260 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-08-24 06:45:25,260 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 101 flow [2023-08-24 06:45:25,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.5) internal successors, (951), 6 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:25,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:25,262 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:25,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 06:45:25,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:25,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:25,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:25,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1076409068, now seen corresponding path program 2 times [2023-08-24 06:45:25,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:25,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56084005] [2023-08-24 06:45:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:25,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:25,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:25,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56084005] [2023-08-24 06:45:25,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56084005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:25,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641015592] [2023-08-24 06:45:25,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:45:25,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:25,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:25,666 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 06:45:25,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 06:45:25,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:45:25,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:45:25,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:45:25,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:25,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:25,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641015592] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:25,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:25,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 06:45:25,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702633719] [2023-08-24 06:45:25,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:25,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 06:45:25,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:25,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 06:45:25,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-24 06:45:25,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 06:45:25,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 101 flow. Second operand has 12 states, 12 states have (on average 158.25) internal successors, (1899), 12 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:25,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:25,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 06:45:25,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:25,918 INFO L124 PetriNetUnfolderBase]: 47/134 cut-off events. [2023-08-24 06:45:25,918 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-24 06:45:25,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 134 events. 47/134 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 42 based on Foata normal form. 6/116 useless extension candidates. Maximal degree in co-relation 234. Up to 108 conditions per place. [2023-08-24 06:45:25,920 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 20 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-08-24 06:45:25,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 199 flow [2023-08-24 06:45:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:45:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:45:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1921 transitions. [2023-08-24 06:45:25,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397893772893773 [2023-08-24 06:45:25,926 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1921 transitions. [2023-08-24 06:45:25,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1921 transitions. [2023-08-24 06:45:25,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:25,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1921 transitions. [2023-08-24 06:45:25,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 160.08333333333334) internal successors, (1921), 12 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:25,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 364.0) internal successors, (4732), 13 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:25,941 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 364.0) internal successors, (4732), 13 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:25,941 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 101 flow. Second operand 12 states and 1921 transitions. [2023-08-24 06:45:25,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 199 flow [2023-08-24 06:45:25,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 185 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 06:45:25,945 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 171 flow [2023-08-24 06:45:25,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2023-08-24 06:45:25,946 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-08-24 06:45:25,947 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 171 flow [2023-08-24 06:45:25,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 158.25) internal successors, (1899), 12 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:25,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:25,949 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:25,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 06:45:26,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-24 06:45:26,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:26,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:26,155 INFO L85 PathProgramCache]: Analyzing trace with hash -749552364, now seen corresponding path program 3 times [2023-08-24 06:45:26,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:26,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153939423] [2023-08-24 06:45:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:26,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:26,188 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:45:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:26,244 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:45:26,244 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:45:26,245 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:45:26,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 06:45:26,247 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:45:26,248 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:45:26,255 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:45:26,255 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 06:45:26,288 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 06:45:26,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:26,342 INFO L124 PetriNetUnfolderBase]: 75/438 cut-off events. [2023-08-24 06:45:26,342 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 06:45:26,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1742 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 270. Up to 12 conditions per place. [2023-08-24 06:45:26,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:26,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:26,350 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:45:26,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:26,350 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:26,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:26,393 INFO L124 PetriNetUnfolderBase]: 75/438 cut-off events. [2023-08-24 06:45:26,394 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 06:45:26,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1742 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 270. Up to 12 conditions per place. [2023-08-24 06:45:26,415 INFO L119 LiptonReduction]: Number of co-enabled transitions 33796 [2023-08-24 06:45:29,631 INFO L134 LiptonReduction]: Checked pairs total: 58541 [2023-08-24 06:45:29,632 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-08-24 06:45:29,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:45:29,634 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;@7a9fc3c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:45:29,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:45:29,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:45:29,641 INFO L124 PetriNetUnfolderBase]: 37/112 cut-off events. [2023-08-24 06:45:29,641 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 06:45:29,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:29,642 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:29,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:29,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:29,642 INFO L85 PathProgramCache]: Analyzing trace with hash -705583606, now seen corresponding path program 1 times [2023-08-24 06:45:29,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:29,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599544460] [2023-08-24 06:45:29,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:29,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:29,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:29,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599544460] [2023-08-24 06:45:29,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599544460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:45:29,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:45:29,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:45:29,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191514612] [2023-08-24 06:45:29,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:45:29,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:45:29,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:29,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:45:29,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:45:29,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 06:45:29,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:29,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:29,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 06:45:29,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:31,046 INFO L124 PetriNetUnfolderBase]: 10521/16515 cut-off events. [2023-08-24 06:45:31,047 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-24 06:45:31,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32050 conditions, 16515 events. 10521/16515 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 109632 event pairs, 9818 based on Foata normal form. 2499/16448 useless extension candidates. Maximal degree in co-relation 13969. Up to 15431 conditions per place. [2023-08-24 06:45:31,093 INFO L140 encePairwiseOnDemand]: 461/495 looper letters, 38 selfloop transitions, 2 changer transitions 23/70 dead transitions. [2023-08-24 06:45:31,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-08-24 06:45:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:45:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:45:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-08-24 06:45:31,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2023-08-24 06:45:31,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-08-24 06:45:31,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-08-24 06:45:31,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:31,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-08-24 06:45:31,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:31,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:31,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:31,101 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 735 transitions. [2023-08-24 06:45:31,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-08-24 06:45:31,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 06:45:31,106 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 116 flow [2023-08-24 06:45:31,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-08-24 06:45:31,204 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-24 06:45:31,204 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 116 flow [2023-08-24 06:45:31,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:31,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:31,204 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:31,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 06:45:31,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:31,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:31,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1756496974, now seen corresponding path program 1 times [2023-08-24 06:45:31,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:31,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930975654] [2023-08-24 06:45:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:31,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:31,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930975654] [2023-08-24 06:45:31,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930975654] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:31,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027474181] [2023-08-24 06:45:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:31,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:31,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:31,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 06:45:31,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 06:45:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:31,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:45:31,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:31,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:31,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027474181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:31,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:31,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 06:45:31,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788421339] [2023-08-24 06:45:31,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:31,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:45:31,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:31,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:45:31,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:45:31,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 06:45:31,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 216.71428571428572) internal successors, (1517), 7 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:31,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:31,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 06:45:31,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:31,693 INFO L124 PetriNetUnfolderBase]: 1958/3219 cut-off events. [2023-08-24 06:45:31,693 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-24 06:45:31,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 3219 events. 1958/3219 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17489 event pairs, 1837 based on Foata normal form. 0/2639 useless extension candidates. Maximal degree in co-relation 6287. Up to 2999 conditions per place. [2023-08-24 06:45:31,715 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 38 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-08-24 06:45:31,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 214 flow [2023-08-24 06:45:31,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:45:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:45:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1336 transitions. [2023-08-24 06:45:31,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4498316498316498 [2023-08-24 06:45:31,719 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1336 transitions. [2023-08-24 06:45:31,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1336 transitions. [2023-08-24 06:45:31,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:31,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1336 transitions. [2023-08-24 06:45:31,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 222.66666666666666) internal successors, (1336), 6 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:31,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:31,727 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:31,728 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 116 flow. Second operand 6 states and 1336 transitions. [2023-08-24 06:45:31,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 214 flow [2023-08-24 06:45:31,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 208 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 06:45:31,730 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-08-24 06:45:31,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-24 06:45:31,734 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-08-24 06:45:31,734 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-08-24 06:45:31,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 216.71428571428572) internal successors, (1517), 7 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:31,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:31,735 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:31,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 06:45:31,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:31,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:31,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1965936650, now seen corresponding path program 2 times [2023-08-24 06:45:31,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:31,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160844484] [2023-08-24 06:45:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:31,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:32,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:32,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160844484] [2023-08-24 06:45:32,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160844484] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:32,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295908465] [2023-08-24 06:45:32,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:45:32,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:32,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:32,102 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 06:45:32,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 06:45:32,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:45:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:45:32,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:45:32,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:32,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:32,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295908465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:32,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:32,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 06:45:32,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760675229] [2023-08-24 06:45:32,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:32,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:45:32,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:32,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:45:32,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:45:32,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 06:45:32,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:32,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:32,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 06:45:32,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:32,614 INFO L124 PetriNetUnfolderBase]: 1958/3225 cut-off events. [2023-08-24 06:45:32,614 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-24 06:45:32,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 3225 events. 1958/3225 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17474 event pairs, 1837 based on Foata normal form. 6/2652 useless extension candidates. Maximal degree in co-relation 6272. Up to 2999 conditions per place. [2023-08-24 06:45:32,632 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 38 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-08-24 06:45:32,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 280 flow [2023-08-24 06:45:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:45:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:45:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2635 transitions. [2023-08-24 06:45:32,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4436026936026936 [2023-08-24 06:45:32,640 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2635 transitions. [2023-08-24 06:45:32,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2635 transitions. [2023-08-24 06:45:32,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:32,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2635 transitions. [2023-08-24 06:45:32,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 219.58333333333334) internal successors, (2635), 12 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:32,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:32,659 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:32,659 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2635 transitions. [2023-08-24 06:45:32,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 280 flow [2023-08-24 06:45:32,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 266 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 06:45:32,663 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-08-24 06:45:32,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-08-24 06:45:32,665 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-08-24 06:45:32,665 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-08-24 06:45:32,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:32,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:32,666 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:32,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 06:45:32,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:32,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:32,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:32,873 INFO L85 PathProgramCache]: Analyzing trace with hash -901075190, now seen corresponding path program 3 times [2023-08-24 06:45:32,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:32,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972236433] [2023-08-24 06:45:32,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:32,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:32,906 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:45:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:32,934 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:45:32,934 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:45:32,935 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:45:32,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 06:45:32,935 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:45:32,936 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:45:32,936 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:45:32,936 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 06:45:32,979 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 06:45:32,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:33,081 INFO L124 PetriNetUnfolderBase]: 110/641 cut-off events. [2023-08-24 06:45:33,081 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 06:45:33,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 641 events. 110/641 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2834 event pairs, 1 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2023-08-24 06:45:33,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:33,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:33,100 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:45:33,100 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:33,101 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:33,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:33,182 INFO L124 PetriNetUnfolderBase]: 110/641 cut-off events. [2023-08-24 06:45:33,182 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 06:45:33,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 641 events. 110/641 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2834 event pairs, 1 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2023-08-24 06:45:33,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 66456 [2023-08-24 06:45:37,071 INFO L134 LiptonReduction]: Checked pairs total: 111148 [2023-08-24 06:45:37,071 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-08-24 06:45:37,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:45:37,073 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;@7a9fc3c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:45:37,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:45:37,083 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:45:37,083 INFO L124 PetriNetUnfolderBase]: 64/182 cut-off events. [2023-08-24 06:45:37,083 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 06:45:37,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:37,084 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:37,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:37,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:37,084 INFO L85 PathProgramCache]: Analyzing trace with hash -352006013, now seen corresponding path program 1 times [2023-08-24 06:45:37,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:37,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169777679] [2023-08-24 06:45:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:37,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:37,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:37,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169777679] [2023-08-24 06:45:37,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169777679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:45:37,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:45:37,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:45:37,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688804082] [2023-08-24 06:45:37,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:45:37,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:45:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:45:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:45:37,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 06:45:37,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:37,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:37,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 06:45:37,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:54,146 INFO L124 PetriNetUnfolderBase]: 199024/283218 cut-off events. [2023-08-24 06:45:54,147 INFO L125 PetriNetUnfolderBase]: For 3132/3132 co-relation queries the response was YES. [2023-08-24 06:45:54,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544637 conditions, 283218 events. 199024/283218 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 7667. Compared 2271080 event pairs, 188343 based on Foata normal form. 51886/290674 useless extension candidates. Maximal degree in co-relation 50654. Up to 259483 conditions per place. [2023-08-24 06:45:54,890 INFO L140 encePairwiseOnDemand]: 576/621 looper letters, 50 selfloop transitions, 2 changer transitions 24/90 dead transitions. [2023-08-24 06:45:54,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 352 flow [2023-08-24 06:45:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:45:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:45:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 933 transitions. [2023-08-24 06:45:54,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500805152979066 [2023-08-24 06:45:54,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 933 transitions. [2023-08-24 06:45:54,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 933 transitions. [2023-08-24 06:45:54,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:54,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 933 transitions. [2023-08-24 06:45:54,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:54,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 621.0) internal successors, (2484), 4 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:54,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 621.0) internal successors, (2484), 4 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:54,903 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 933 transitions. [2023-08-24 06:45:54,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 352 flow [2023-08-24 06:45:54,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 06:45:54,909 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 163 flow [2023-08-24 06:45:54,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2023-08-24 06:45:54,910 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-08-24 06:45:54,910 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 163 flow [2023-08-24 06:45:54,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:54,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:54,911 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:54,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 06:45:54,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:54,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1920621426, now seen corresponding path program 1 times [2023-08-24 06:45:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:54,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111723780] [2023-08-24 06:45:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:54,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:54,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:54,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111723780] [2023-08-24 06:45:54,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111723780] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:54,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565145015] [2023-08-24 06:45:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:54,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:54,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:54,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 06:45:54,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 06:45:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:55,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:45:55,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:55,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:55,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565145015] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:55,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:55,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 06:45:55,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022271081] [2023-08-24 06:45:55,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:55,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:45:55,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:55,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:45:55,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:45:55,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 06:45:55,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 163 flow. Second operand has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:55,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:55,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 06:45:55,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:58,160 INFO L124 PetriNetUnfolderBase]: 38291/55507 cut-off events. [2023-08-24 06:45:58,160 INFO L125 PetriNetUnfolderBase]: For 1588/1588 co-relation queries the response was YES. [2023-08-24 06:45:58,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107316 conditions, 55507 events. 38291/55507 cut-off events. For 1588/1588 co-relation queries the response was YES. Maximal size of possible extension queue 1783. Compared 388998 event pairs, 36162 based on Foata normal form. 0/45799 useless extension candidates. Maximal degree in co-relation 107302. Up to 50628 conditions per place. [2023-08-24 06:45:58,399 INFO L140 encePairwiseOnDemand]: 618/621 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-24 06:45:58,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 285 flow [2023-08-24 06:45:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:45:58,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:45:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1696 transitions. [2023-08-24 06:45:58,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551798174986581 [2023-08-24 06:45:58,404 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1696 transitions. [2023-08-24 06:45:58,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1696 transitions. [2023-08-24 06:45:58,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:58,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1696 transitions. [2023-08-24 06:45:58,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 282.6666666666667) internal successors, (1696), 6 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:58,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 621.0) internal successors, (4347), 7 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:58,414 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 621.0) internal successors, (4347), 7 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:58,415 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 163 flow. Second operand 6 states and 1696 transitions. [2023-08-24 06:45:58,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 285 flow [2023-08-24 06:45:58,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 275 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 06:45:58,418 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 189 flow [2023-08-24 06:45:58,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-08-24 06:45:58,420 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2023-08-24 06:45:58,420 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 189 flow [2023-08-24 06:45:58,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:58,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:58,422 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:58,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 06:45:58,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 06:45:58,627 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:58,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash -291570877, now seen corresponding path program 2 times [2023-08-24 06:45:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:58,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182567833] [2023-08-24 06:45:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:58,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:58,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182567833] [2023-08-24 06:45:58,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182567833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:58,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18775099] [2023-08-24 06:45:58,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:45:58,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:58,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:58,702 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 06:45:58,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 06:45:58,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:45:58,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:45:58,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:45:58,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:58,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:58,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18775099] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:58,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:58,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 06:45:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377688747] [2023-08-24 06:45:58,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:58,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:45:58,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:45:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:45:58,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 06:45:58,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 189 flow. Second operand has 13 states, 13 states have (on average 274.46153846153845) internal successors, (3568), 13 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:58,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:58,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 06:45:58,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:46:02,180 INFO L124 PetriNetUnfolderBase]: 38291/55513 cut-off events. [2023-08-24 06:46:02,180 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2023-08-24 06:46:02,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106984 conditions, 55513 events. 38291/55513 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 1783. Compared 388826 event pairs, 36162 based on Foata normal form. 6/45812 useless extension candidates. Maximal degree in co-relation 106924. Up to 50628 conditions per place. [2023-08-24 06:46:02,651 INFO L140 encePairwiseOnDemand]: 618/621 looper letters, 50 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-08-24 06:46:02,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 347 flow [2023-08-24 06:46:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:46:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:46:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3343 transitions. [2023-08-24 06:46:02,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4486044015029522 [2023-08-24 06:46:02,660 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3343 transitions. [2023-08-24 06:46:02,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3343 transitions. [2023-08-24 06:46:02,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:46:02,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3343 transitions. [2023-08-24 06:46:02,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 278.5833333333333) internal successors, (3343), 12 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:46:02,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 621.0) internal successors, (8073), 13 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:46:02,686 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 621.0) internal successors, (8073), 13 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:46:02,686 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 189 flow. Second operand 12 states and 3343 transitions. [2023-08-24 06:46:02,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 347 flow [2023-08-24 06:46:02,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 333 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 06:46:02,690 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 259 flow [2023-08-24 06:46:02,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-08-24 06:46:02,691 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 6 predicate places. [2023-08-24 06:46:02,691 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 259 flow [2023-08-24 06:46:02,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 274.46153846153845) internal successors, (3568), 13 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:46:02,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:02,692 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:02,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 06:46:02,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:46:02,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:02,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1688672413, now seen corresponding path program 3 times [2023-08-24 06:46:02,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:02,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942661616] [2023-08-24 06:46:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:02,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:02,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:46:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:02,958 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:46:02,958 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:46:02,958 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:46:02,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 06:46:02,958 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:46:02,959 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:46:02,959 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:46:02,959 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 06:46:02,995 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 06:46:02,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:03,149 INFO L124 PetriNetUnfolderBase]: 157/912 cut-off events. [2023-08-24 06:46:03,149 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 06:46:03,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 912 events. 157/912 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4361 event pairs, 6 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 661. Up to 32 conditions per place. [2023-08-24 06:46:03,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:03,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:03,170 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:46:03,170 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:03,171 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:03,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:03,283 INFO L124 PetriNetUnfolderBase]: 157/912 cut-off events. [2023-08-24 06:46:03,283 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 06:46:03,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 912 events. 157/912 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4361 event pairs, 6 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 661. Up to 32 conditions per place. [2023-08-24 06:46:03,345 INFO L119 LiptonReduction]: Number of co-enabled transitions 109624 [2023-08-24 06:46:07,448 INFO L134 LiptonReduction]: Checked pairs total: 192660 [2023-08-24 06:46:07,449 INFO L136 LiptonReduction]: Total number of compositions: 341 [2023-08-24 06:46:07,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:46:07,450 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;@7a9fc3c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:46:07,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:46:07,463 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:46:07,463 INFO L124 PetriNetUnfolderBase]: 87/249 cut-off events. [2023-08-24 06:46:07,463 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 06:46:07,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:07,463 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:07,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:07,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:07,463 INFO L85 PathProgramCache]: Analyzing trace with hash -403545912, now seen corresponding path program 1 times [2023-08-24 06:46:07,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:07,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192289622] [2023-08-24 06:46:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:07,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:46:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-24 06:46:07,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:46:07,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192289622] [2023-08-24 06:46:07,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192289622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:46:07,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:46:07,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:46:07,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339741417] [2023-08-24 06:46:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:46:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:46:07,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:46:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:46:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:46:07,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 756 [2023-08-24 06:46:07,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:46:07,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:46:07,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 756 [2023-08-24 06:46:07,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand