/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_77-tricky_address4_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 06:45:26,991 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 06:45:27,081 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 06:45:27,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 06:45:27,087 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 06:45:27,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 06:45:27,118 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 06:45:27,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 06:45:27,123 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 06:45:27,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 06:45:27,126 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 06:45:27,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 06:45:27,127 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 06:45:27,128 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 06:45:27,128 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 06:45:27,128 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 06:45:27,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 06:45:27,129 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 06:45:27,129 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 06:45:27,129 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 06:45:27,129 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 06:45:27,130 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 06:45:27,130 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 06:45:27,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 06:45:27,131 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 06:45:27,131 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 06:45:27,131 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 06:45:27,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:45:27,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 06:45:27,132 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 06:45:27,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 06:45:27,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 06:45:27,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 06:45:27,133 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 06:45:27,133 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 06:45:27,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 06:45:27,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 06:45:27,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 06:45:27,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 06:45:27,471 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 06:45:27,472 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 06:45:27,473 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-24 06:45:28,515 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 06:45:28,758 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 06:45:28,759 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-24 06:45:28,773 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0284d6a2f/e310029f0efb471da535afca7c5387eb/FLAG28275030d [2023-08-24 06:45:28,785 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0284d6a2f/e310029f0efb471da535afca7c5387eb [2023-08-24 06:45:28,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 06:45:28,788 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 06:45:28,789 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 06:45:28,789 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 06:45:28,791 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 06:45:28,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:45:28" (1/1) ... [2023-08-24 06:45:28,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9a77ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:28, skipping insertion in model container [2023-08-24 06:45:28,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:45:28" (1/1) ... [2023-08-24 06:45:28,830 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 06:45:29,232 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_77-tricky_address4_racing.i[41323,41336] [2023-08-24 06:45:29,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:45:29,287 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 06:45:29,311 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:45:29,313 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:45:29,318 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-24 06:45:29,332 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_77-tricky_address4_racing.i[41323,41336] [2023-08-24 06:45:29,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:45:29,424 INFO L206 MainTranslator]: Completed translation [2023-08-24 06:45:29,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29 WrapperNode [2023-08-24 06:45:29,425 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 06:45:29,426 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 06:45:29,426 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 06:45:29,426 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 06:45:29,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (1/1) ... [2023-08-24 06:45:29,462 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (1/1) ... [2023-08-24 06:45:29,494 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 196 [2023-08-24 06:45:29,494 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 06:45:29,495 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 06:45:29,495 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 06:45:29,495 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 06:45:29,502 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (1/1) ... [2023-08-24 06:45:29,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (1/1) ... [2023-08-24 06:45:29,520 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (1/1) ... [2023-08-24 06:45:29,521 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (1/1) ... [2023-08-24 06:45:29,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (1/1) ... [2023-08-24 06:45:29,540 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (1/1) ... [2023-08-24 06:45:29,542 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (1/1) ... [2023-08-24 06:45:29,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (1/1) ... [2023-08-24 06:45:29,545 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 06:45:29,546 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 06:45:29,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 06:45:29,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 06:45:29,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (1/1) ... [2023-08-24 06:45:29,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:45:29,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:29,581 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 06:45:29,609 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 06:45:29,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 06:45:29,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 06:45:29,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 06:45:29,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 06:45:29,626 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 06:45:29,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 06:45:29,627 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 06:45:29,627 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 06:45:29,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 06:45:29,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 06:45:29,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 06:45:29,629 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 06:45:29,798 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 06:45:29,800 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 06:45:30,084 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 06:45:30,091 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 06:45:30,092 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-24 06:45:30,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:45:30 BoogieIcfgContainer [2023-08-24 06:45:30,093 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 06:45:30,095 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 06:45:30,095 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 06:45:30,097 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 06:45:30,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 06:45:28" (1/3) ... [2023-08-24 06:45:30,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27017fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:45:30, skipping insertion in model container [2023-08-24 06:45:30,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:29" (2/3) ... [2023-08-24 06:45:30,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27017fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:45:30, skipping insertion in model container [2023-08-24 06:45:30,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:45:30" (3/3) ... [2023-08-24 06:45:30,100 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-08-24 06:45:30,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 06:45:30,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 06:45:30,114 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 06:45:30,179 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 06:45:30,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 400 flow [2023-08-24 06:45:30,274 INFO L124 PetriNetUnfolderBase]: 45/268 cut-off events. [2023-08-24 06:45:30,275 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-24 06:45:30,286 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 06:45:30,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 196 transitions, 400 flow [2023-08-24 06:45:30,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 191 transitions, 387 flow [2023-08-24 06:45:30,294 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:45:30,301 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 191 transitions, 387 flow [2023-08-24 06:45:30,304 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 191 transitions, 387 flow [2023-08-24 06:45:30,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 191 transitions, 387 flow [2023-08-24 06:45:30,344 INFO L124 PetriNetUnfolderBase]: 44/263 cut-off events. [2023-08-24 06:45:30,344 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:30,346 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 06:45:30,350 INFO L119 LiptonReduction]: Number of co-enabled transitions 11076 [2023-08-24 06:45:33,088 INFO L134 LiptonReduction]: Checked pairs total: 18087 [2023-08-24 06:45:33,088 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-24 06:45:33,106 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:45:33,111 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2d0c06f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:45:33,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:45:33,117 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:45:33,117 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2023-08-24 06:45:33,117 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:33,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:33,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-24 06:45:33,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:33,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:33,122 INFO L85 PathProgramCache]: Analyzing trace with hash -995381996, now seen corresponding path program 1 times [2023-08-24 06:45:33,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:33,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612647504] [2023-08-24 06:45:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:33,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:33,321 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 06:45:33,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:33,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612647504] [2023-08-24 06:45:33,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612647504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:45:33,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:45:33,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:45:33,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327199325] [2023-08-24 06:45:33,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:45:33,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:45:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:45:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:45:33,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 06:45:33,355 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 06:45:33,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:33,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 06:45:33,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:33,491 INFO L124 PetriNetUnfolderBase]: 272/611 cut-off events. [2023-08-24 06:45:33,492 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:33,495 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 06:45:33,497 INFO L140 encePairwiseOnDemand]: 339/364 looper letters, 20 selfloop transitions, 2 changer transitions 18/45 dead transitions. [2023-08-24 06:45:33,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-08-24 06:45:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:45:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:45:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2023-08-24 06:45:33,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48534798534798534 [2023-08-24 06:45:33,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2023-08-24 06:45:33,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2023-08-24 06:45:33,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:33,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2023-08-24 06:45:33,524 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 06:45:33,529 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 06:45:33,530 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 06:45:33,531 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 530 transitions. [2023-08-24 06:45:33,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-08-24 06:45:33,535 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 06:45:33,537 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 69 flow [2023-08-24 06:45:33,539 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 06:45:33,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-24 06:45:33,541 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 69 flow [2023-08-24 06:45:33,542 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 06:45:33,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:33,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:33,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 06:45:33,543 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:33,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1047843948, now seen corresponding path program 1 times [2023-08-24 06:45:33,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:33,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121416147] [2023-08-24 06:45:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:33,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:33,638 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 06:45:33,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:33,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121416147] [2023-08-24 06:45:33,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121416147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009081954] [2023-08-24 06:45:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:33,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:33,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:33,642 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 06:45:33,643 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 06:45:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:33,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:45:33,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:33,737 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 06:45:33,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:33,765 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 06:45:33,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009081954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:33,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:33,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 06:45:33,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430431977] [2023-08-24 06:45:33,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:33,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 06:45:33,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:33,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 06:45:33,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 06:45:33,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 06:45:33,769 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 06:45:33,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:33,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 06:45:33,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:33,838 INFO L124 PetriNetUnfolderBase]: 47/128 cut-off events. [2023-08-24 06:45:33,838 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:33,839 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 06:45:33,839 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-08-24 06:45:33,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 131 flow [2023-08-24 06:45:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:45:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:45:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 970 transitions. [2023-08-24 06:45:33,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441391941391941 [2023-08-24 06:45:33,843 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 970 transitions. [2023-08-24 06:45:33,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 970 transitions. [2023-08-24 06:45:33,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:33,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 970 transitions. [2023-08-24 06:45:33,846 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 06:45:33,851 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 06:45:33,853 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 06:45:33,854 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 69 flow. Second operand 6 states and 970 transitions. [2023-08-24 06:45:33,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 131 flow [2023-08-24 06:45:33,858 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 06:45:33,859 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 101 flow [2023-08-24 06:45:33,859 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 06:45:33,859 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-08-24 06:45:33,860 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 101 flow [2023-08-24 06:45:33,861 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 06:45:33,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:33,861 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:33,867 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 06:45:34,065 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 06:45:34,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:34,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1076409068, now seen corresponding path program 2 times [2023-08-24 06:45:34,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:34,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183768019] [2023-08-24 06:45:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:34,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:34,245 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 06:45:34,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:34,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183768019] [2023-08-24 06:45:34,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183768019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:34,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494934989] [2023-08-24 06:45:34,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:45:34,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:34,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:34,249 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 06:45:34,252 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 06:45:34,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:45:34,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:45:34,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:45:34,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:34,363 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 06:45:34,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:34,422 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 06:45:34,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494934989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:34,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:34,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 06:45:34,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526837177] [2023-08-24 06:45:34,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:34,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 06:45:34,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 06:45:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-24 06:45:34,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 06:45:34,428 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 06:45:34,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:34,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 06:45:34,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:34,493 INFO L124 PetriNetUnfolderBase]: 47/134 cut-off events. [2023-08-24 06:45:34,493 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-24 06:45:34,493 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 06:45:34,494 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 20 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-08-24 06:45:34,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 199 flow [2023-08-24 06:45:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:45:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:45:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1921 transitions. [2023-08-24 06:45:34,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397893772893773 [2023-08-24 06:45:34,498 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1921 transitions. [2023-08-24 06:45:34,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1921 transitions. [2023-08-24 06:45:34,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:34,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1921 transitions. [2023-08-24 06:45:34,503 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 06:45:34,509 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 06:45:34,511 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 06:45:34,511 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 101 flow. Second operand 12 states and 1921 transitions. [2023-08-24 06:45:34,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 199 flow [2023-08-24 06:45:34,513 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 06:45:34,514 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 171 flow [2023-08-24 06:45:34,514 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 06:45:34,515 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-08-24 06:45:34,515 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 171 flow [2023-08-24 06:45:34,516 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 06:45:34,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:34,516 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:34,525 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 06:45:34,721 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 06:45:34,721 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:34,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:34,722 INFO L85 PathProgramCache]: Analyzing trace with hash -749552364, now seen corresponding path program 3 times [2023-08-24 06:45:34,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:34,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326310738] [2023-08-24 06:45:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:34,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:34,762 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:45:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:34,803 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:45:34,804 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:45:34,805 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:45:34,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 06:45:34,806 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:45:34,808 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:45:34,809 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:45:34,809 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 06:45:34,850 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 06:45:34,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:34,911 INFO L124 PetriNetUnfolderBase]: 75/438 cut-off events. [2023-08-24 06:45:34,911 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 06:45:34,916 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 06:45:34,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:34,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:34,919 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:45:34,920 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:34,920 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:34,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 06:45:34,965 INFO L124 PetriNetUnfolderBase]: 75/438 cut-off events. [2023-08-24 06:45:34,966 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 06:45:34,970 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 06:45:34,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 33796 [2023-08-24 06:45:38,124 INFO L134 LiptonReduction]: Checked pairs total: 58541 [2023-08-24 06:45:38,124 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-08-24 06:45:38,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:45:38,127 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;@2d0c06f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:45:38,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:45:38,133 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:45:38,134 INFO L124 PetriNetUnfolderBase]: 37/112 cut-off events. [2023-08-24 06:45:38,134 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 06:45:38,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:38,134 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:38,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:38,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:38,134 INFO L85 PathProgramCache]: Analyzing trace with hash -705583606, now seen corresponding path program 1 times [2023-08-24 06:45:38,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:38,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753048570] [2023-08-24 06:45:38,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:38,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:38,166 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 06:45:38,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:38,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753048570] [2023-08-24 06:45:38,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753048570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:45:38,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:45:38,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:45:38,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508412291] [2023-08-24 06:45:38,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:45:38,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:45:38,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:45:38,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:45:38,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 06:45:38,170 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 06:45:38,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:38,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 06:45:38,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:39,460 INFO L124 PetriNetUnfolderBase]: 10521/16515 cut-off events. [2023-08-24 06:45:39,461 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-24 06:45:39,483 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 06:45:39,506 INFO L140 encePairwiseOnDemand]: 461/495 looper letters, 38 selfloop transitions, 2 changer transitions 23/70 dead transitions. [2023-08-24 06:45:39,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-08-24 06:45:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:45:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:45:39,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-08-24 06:45:39,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2023-08-24 06:45:39,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-08-24 06:45:39,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-08-24 06:45:39,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:39,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-08-24 06:45:39,511 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 06:45:39,513 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 06:45:39,513 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 06:45:39,513 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 735 transitions. [2023-08-24 06:45:39,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-08-24 06:45:39,515 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 06:45:39,516 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 116 flow [2023-08-24 06:45:39,516 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 06:45:39,517 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-24 06:45:39,517 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 116 flow [2023-08-24 06:45:39,517 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 06:45:39,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:39,517 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:39,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 06:45:39,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:39,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:39,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1756496974, now seen corresponding path program 1 times [2023-08-24 06:45:39,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:39,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517569316] [2023-08-24 06:45:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:39,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:39,556 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 06:45:39,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:39,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517569316] [2023-08-24 06:45:39,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517569316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:39,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632829038] [2023-08-24 06:45:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:39,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:39,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:39,561 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 06:45:39,579 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 06:45:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:39,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:45:39,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:39,649 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 06:45:39,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:39,664 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 06:45:39,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632829038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:39,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:39,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 06:45:39,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366202106] [2023-08-24 06:45:39,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:39,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:45:39,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:39,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:45:39,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:45:39,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 06:45:39,668 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 06:45:39,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:39,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 06:45:39,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:39,991 INFO L124 PetriNetUnfolderBase]: 1958/3219 cut-off events. [2023-08-24 06:45:39,991 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-24 06:45:39,996 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 06:45:40,004 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 38 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-08-24 06:45:40,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 214 flow [2023-08-24 06:45:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:45:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:45:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1336 transitions. [2023-08-24 06:45:40,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4498316498316498 [2023-08-24 06:45:40,008 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1336 transitions. [2023-08-24 06:45:40,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1336 transitions. [2023-08-24 06:45:40,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:40,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1336 transitions. [2023-08-24 06:45:40,012 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 06:45:40,015 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 06:45:40,016 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 06:45:40,016 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 116 flow. Second operand 6 states and 1336 transitions. [2023-08-24 06:45:40,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 214 flow [2023-08-24 06:45:40,017 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 06:45:40,018 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-08-24 06:45:40,018 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 06:45:40,018 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-08-24 06:45:40,018 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-08-24 06:45:40,019 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 06:45:40,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:40,019 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:40,027 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 06:45:40,224 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 06:45:40,224 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:40,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:40,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1965936650, now seen corresponding path program 2 times [2023-08-24 06:45:40,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:40,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475866549] [2023-08-24 06:45:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:40,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:40,297 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 06:45:40,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:40,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475866549] [2023-08-24 06:45:40,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475866549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:40,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672238923] [2023-08-24 06:45:40,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:45:40,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:40,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:40,299 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 06:45:40,327 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 06:45:40,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:45:40,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:45:40,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:45:40,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:40,401 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 06:45:40,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:40,441 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 06:45:40,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672238923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:40,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:40,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 06:45:40,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490173062] [2023-08-24 06:45:40,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:40,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:45:40,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:40,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:45:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:45:40,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 06:45:40,447 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 06:45:40,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:40,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 06:45:40,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:40,703 INFO L124 PetriNetUnfolderBase]: 1958/3225 cut-off events. [2023-08-24 06:45:40,703 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-24 06:45:40,709 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 06:45:40,718 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 38 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-08-24 06:45:40,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 280 flow [2023-08-24 06:45:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:45:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:45:40,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2635 transitions. [2023-08-24 06:45:40,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4436026936026936 [2023-08-24 06:45:40,725 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2635 transitions. [2023-08-24 06:45:40,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2635 transitions. [2023-08-24 06:45:40,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:40,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2635 transitions. [2023-08-24 06:45:40,731 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 06:45:40,737 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 06:45:40,738 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 06:45:40,738 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2635 transitions. [2023-08-24 06:45:40,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 280 flow [2023-08-24 06:45:40,740 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 06:45:40,741 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-08-24 06:45:40,741 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 06:45:40,741 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-08-24 06:45:40,742 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-08-24 06:45:40,743 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 06:45:40,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:40,743 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:40,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 06:45:40,948 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 06:45:40,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:40,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash -901075190, now seen corresponding path program 3 times [2023-08-24 06:45:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:40,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659434730] [2023-08-24 06:45:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:40,970 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:45:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:40,998 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:45:40,998 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:45:40,998 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:45:40,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 06:45:40,999 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:45:40,999 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:45:40,999 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:45:40,999 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 06:45:41,029 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 06:45:41,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:41,134 INFO L124 PetriNetUnfolderBase]: 110/641 cut-off events. [2023-08-24 06:45:41,134 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 06:45:41,143 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 06:45:41,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:41,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:41,155 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:45:41,155 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:41,155 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:41,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 06:45:41,240 INFO L124 PetriNetUnfolderBase]: 110/641 cut-off events. [2023-08-24 06:45:41,240 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 06:45:41,250 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 06:45:41,278 INFO L119 LiptonReduction]: Number of co-enabled transitions 66456 [2023-08-24 06:45:45,051 INFO L134 LiptonReduction]: Checked pairs total: 111148 [2023-08-24 06:45:45,052 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-08-24 06:45:45,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:45:45,053 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;@2d0c06f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:45:45,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:45:45,064 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:45:45,064 INFO L124 PetriNetUnfolderBase]: 64/182 cut-off events. [2023-08-24 06:45:45,064 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 06:45:45,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:45,064 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:45,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:45,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:45,065 INFO L85 PathProgramCache]: Analyzing trace with hash -352006013, now seen corresponding path program 1 times [2023-08-24 06:45:45,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:45,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074254105] [2023-08-24 06:45:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:45,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:45,090 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 06:45:45,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:45,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074254105] [2023-08-24 06:45:45,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074254105] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:45:45,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:45:45,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:45:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525496921] [2023-08-24 06:45:45,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:45:45,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:45:45,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:45:45,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:45:45,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 06:45:45,093 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 06:45:45,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:45,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 06:45:45,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:46:02,115 INFO L124 PetriNetUnfolderBase]: 199024/283218 cut-off events. [2023-08-24 06:46:02,115 INFO L125 PetriNetUnfolderBase]: For 3132/3132 co-relation queries the response was YES. [2023-08-24 06:46:02,544 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 06:46:02,863 INFO L140 encePairwiseOnDemand]: 576/621 looper letters, 50 selfloop transitions, 2 changer transitions 24/90 dead transitions. [2023-08-24 06:46:02,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 352 flow [2023-08-24 06:46:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:46:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:46:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 933 transitions. [2023-08-24 06:46:02,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500805152979066 [2023-08-24 06:46:02,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 933 transitions. [2023-08-24 06:46:02,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 933 transitions. [2023-08-24 06:46:02,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:46:02,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 933 transitions. [2023-08-24 06:46:02,868 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 06:46:02,872 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 06:46:02,873 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 06:46:02,873 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 933 transitions. [2023-08-24 06:46:02,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 352 flow [2023-08-24 06:46:02,879 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 06:46:02,881 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 163 flow [2023-08-24 06:46:02,881 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 06:46:02,882 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-08-24 06:46:02,882 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 163 flow [2023-08-24 06:46:02,882 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 06:46:02,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:02,882 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:02,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 06:46:02,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:02,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:02,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1920621426, now seen corresponding path program 1 times [2023-08-24 06:46:02,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:02,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580520744] [2023-08-24 06:46:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:02,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:46:02,922 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 06:46:02,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:46:02,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580520744] [2023-08-24 06:46:02,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580520744] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:46:02,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79486332] [2023-08-24 06:46:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:02,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:46:02,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:46:02,926 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 06:46:02,928 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 06:46:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:46:03,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:46:03,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:46:03,027 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 06:46:03,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:46:03,043 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 06:46:03,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79486332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:46:03,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:46:03,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 06:46:03,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945219210] [2023-08-24 06:46:03,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:46:03,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:46:03,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:46:03,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:46:03,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:46:03,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 06:46:03,048 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 06:46:03,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:46:03,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 06:46:03,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:46:06,061 INFO L124 PetriNetUnfolderBase]: 38291/55507 cut-off events. [2023-08-24 06:46:06,061 INFO L125 PetriNetUnfolderBase]: For 1588/1588 co-relation queries the response was YES. [2023-08-24 06:46:06,165 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 06:46:06,302 INFO L140 encePairwiseOnDemand]: 618/621 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-24 06:46:06,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 285 flow [2023-08-24 06:46:06,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:46:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:46:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1696 transitions. [2023-08-24 06:46:06,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551798174986581 [2023-08-24 06:46:06,313 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1696 transitions. [2023-08-24 06:46:06,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1696 transitions. [2023-08-24 06:46:06,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:46:06,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1696 transitions. [2023-08-24 06:46:06,320 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 06:46:06,326 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 06:46:06,327 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 06:46:06,327 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 163 flow. Second operand 6 states and 1696 transitions. [2023-08-24 06:46:06,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 285 flow [2023-08-24 06:46:06,330 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 06:46:06,331 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 189 flow [2023-08-24 06:46:06,331 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 06:46:06,332 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2023-08-24 06:46:06,332 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 189 flow [2023-08-24 06:46:06,333 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 06:46:06,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:06,333 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:06,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 06:46:06,538 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 06:46:06,538 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:06,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:06,539 INFO L85 PathProgramCache]: Analyzing trace with hash -291570877, now seen corresponding path program 2 times [2023-08-24 06:46:06,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:06,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140816753] [2023-08-24 06:46:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:46:06,787 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 06:46:06,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:46:06,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140816753] [2023-08-24 06:46:06,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140816753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:46:06,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829177294] [2023-08-24 06:46:06,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:46:06,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:46:06,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:46:06,789 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 06:46:06,791 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 06:46:06,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:46:06,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:46:06,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:46:06,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:46:06,907 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 06:46:06,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:46:06,946 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 06:46:06,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829177294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:46:06,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:46:06,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 06:46:06,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189662886] [2023-08-24 06:46:06,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:46:06,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:46:06,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:46:06,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:46:06,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:46:06,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 06:46:06,953 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 06:46:06,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:46:06,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 06:46:06,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:46:10,205 INFO L124 PetriNetUnfolderBase]: 38291/55513 cut-off events. [2023-08-24 06:46:10,205 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2023-08-24 06:46:10,345 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 06:46:10,456 INFO L140 encePairwiseOnDemand]: 618/621 looper letters, 50 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-08-24 06:46:10,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 347 flow [2023-08-24 06:46:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:46:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:46:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3343 transitions. [2023-08-24 06:46:10,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4486044015029522 [2023-08-24 06:46:10,465 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3343 transitions. [2023-08-24 06:46:10,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3343 transitions. [2023-08-24 06:46:10,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:46:10,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3343 transitions. [2023-08-24 06:46:10,472 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 06:46:10,481 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 06:46:10,482 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 06:46:10,482 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 189 flow. Second operand 12 states and 3343 transitions. [2023-08-24 06:46:10,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 347 flow [2023-08-24 06:46:10,483 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 06:46:10,484 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 259 flow [2023-08-24 06:46:10,485 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 06:46:10,485 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 6 predicate places. [2023-08-24 06:46:10,485 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 259 flow [2023-08-24 06:46:10,486 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 06:46:10,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:10,486 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:10,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 06:46:10,691 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 06:46:10,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:10,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:10,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1688672413, now seen corresponding path program 3 times [2023-08-24 06:46:10,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:10,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103590573] [2023-08-24 06:46:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:10,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:10,716 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:46:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:46:10,740 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:46:10,741 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:46:10,741 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:46:10,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 06:46:10,741 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:46:10,741 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:46:10,742 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:46:10,742 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 06:46:10,777 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 06:46:10,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:10,906 INFO L124 PetriNetUnfolderBase]: 157/912 cut-off events. [2023-08-24 06:46:10,907 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 06:46:10,928 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 06:46:10,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:10,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:10,936 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:46:10,936 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:10,936 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:10,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 06:46:11,060 INFO L124 PetriNetUnfolderBase]: 157/912 cut-off events. [2023-08-24 06:46:11,061 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 06:46:11,081 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 06:46:11,129 INFO L119 LiptonReduction]: Number of co-enabled transitions 109624 [2023-08-24 06:46:15,353 INFO L134 LiptonReduction]: Checked pairs total: 192660 [2023-08-24 06:46:15,353 INFO L136 LiptonReduction]: Total number of compositions: 341 [2023-08-24 06:46:15,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:46:15,355 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;@2d0c06f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:46:15,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:46:15,374 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:46:15,374 INFO L124 PetriNetUnfolderBase]: 87/249 cut-off events. [2023-08-24 06:46:15,374 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 06:46:15,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:15,375 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:15,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:15,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:15,375 INFO L85 PathProgramCache]: Analyzing trace with hash -403545912, now seen corresponding path program 1 times [2023-08-24 06:46:15,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:15,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429186247] [2023-08-24 06:46:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:15,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:46:15,403 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 06:46:15,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:46:15,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429186247] [2023-08-24 06:46:15,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429186247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:46:15,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:46:15,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:46:15,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250852507] [2023-08-24 06:46:15,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:46:15,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:46:15,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:46:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:46:15,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:46:15,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 756 [2023-08-24 06:46:15,407 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 06:46:15,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:46:15,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 756 [2023-08-24 06:46:15,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand