/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 05:20:19,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 05:20:19,445 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 05:20:19,451 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 05:20:19,452 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 05:20:19,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 05:20:19,484 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 05:20:19,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 05:20:19,485 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 05:20:19,489 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 05:20:19,489 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 05:20:19,490 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 05:20:19,490 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 05:20:19,491 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 05:20:19,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 05:20:19,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 05:20:19,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 05:20:19,492 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 05:20:19,492 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 05:20:19,492 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 05:20:19,492 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 05:20:19,493 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 05:20:19,493 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 05:20:19,494 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 05:20:19,494 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 05:20:19,494 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 05:20:19,494 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 05:20:19,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:20:19,495 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 05:20:19,495 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 05:20:19,496 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 05:20:19,496 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 05:20:19,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 05:20:19,496 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 05:20:19,497 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 05:20:19,497 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 05:20:19,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 05:20:19,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 05:20:19,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 05:20:19,883 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 05:20:19,883 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 05:20:19,884 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-27 05:20:21,067 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 05:20:21,285 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 05:20:21,285 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-27 05:20:21,304 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f541589fd/c387bb75d3d9452bbc7f620c4c5947bb/FLAGd0bec44e2 [2023-08-27 05:20:21,320 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f541589fd/c387bb75d3d9452bbc7f620c4c5947bb [2023-08-27 05:20:21,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 05:20:21,323 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 05:20:21,329 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 05:20:21,330 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 05:20:21,332 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 05:20:21,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:21,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69790c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21, skipping insertion in model container [2023-08-27 05:20:21,334 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:21,395 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 05:20:21,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:20:21,877 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 05:20:21,899 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:20:21,904 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:20:21,911 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-27 05:20:21,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:20:21,996 INFO L206 MainTranslator]: Completed translation [2023-08-27 05:20:21,996 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21 WrapperNode [2023-08-27 05:20:21,997 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 05:20:21,998 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 05:20:21,998 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 05:20:21,998 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 05:20:22,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:22,037 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:22,073 INFO L138 Inliner]: procedures = 271, calls = 32, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 222 [2023-08-27 05:20:22,074 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 05:20:22,075 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 05:20:22,075 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 05:20:22,076 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 05:20:22,083 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:22,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:22,098 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:22,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:22,106 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:22,127 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:22,129 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:22,130 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:22,133 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 05:20:22,134 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 05:20:22,134 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 05:20:22,134 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 05:20:22,135 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (1/1) ... [2023-08-27 05:20:22,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:20:22,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:20:22,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 05:20:22,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 05:20:22,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 05:20:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 05:20:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 05:20:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 05:20:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-27 05:20:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 05:20:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-27 05:20:22,212 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-27 05:20:22,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 05:20:22,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 05:20:22,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 05:20:22,213 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 05:20:22,332 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 05:20:22,334 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 05:20:22,711 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 05:20:22,723 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 05:20:22,724 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-08-27 05:20:22,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:20:22 BoogieIcfgContainer [2023-08-27 05:20:22,726 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 05:20:22,728 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 05:20:22,728 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 05:20:22,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 05:20:22,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:20:21" (1/3) ... [2023-08-27 05:20:22,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b99034e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:20:22, skipping insertion in model container [2023-08-27 05:20:22,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:20:21" (2/3) ... [2023-08-27 05:20:22,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b99034e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:20:22, skipping insertion in model container [2023-08-27 05:20:22,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:20:22" (3/3) ... [2023-08-27 05:20:22,734 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-08-27 05:20:22,751 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 05:20:22,752 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-08-27 05:20:22,752 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 05:20:22,843 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-27 05:20:22,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 239 transitions, 486 flow [2023-08-27 05:20:22,968 INFO L124 PetriNetUnfolderBase]: 52/338 cut-off events. [2023-08-27 05:20:22,968 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 05:20:22,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 338 events. 52/338 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1347 event pairs, 0 based on Foata normal form. 0/256 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-08-27 05:20:22,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 239 transitions, 486 flow [2023-08-27 05:20:22,985 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 228 transitions, 461 flow [2023-08-27 05:20:22,988 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:20:22,996 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 228 transitions, 461 flow [2023-08-27 05:20:22,998 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 228 transitions, 461 flow [2023-08-27 05:20:22,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 228 transitions, 461 flow [2023-08-27 05:20:23,059 INFO L124 PetriNetUnfolderBase]: 51/327 cut-off events. [2023-08-27 05:20:23,059 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:20:23,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 327 events. 51/327 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1252 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-08-27 05:20:23,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 18530 [2023-08-27 05:20:26,498 INFO L134 LiptonReduction]: Checked pairs total: 29411 [2023-08-27 05:20:26,498 INFO L136 LiptonReduction]: Total number of compositions: 213 [2023-08-27 05:20:26,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:20:26,515 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;@5ec2f14a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:20:26,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:20:26,520 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:20:26,521 INFO L124 PetriNetUnfolderBase]: 8/35 cut-off events. [2023-08-27 05:20:26,521 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:20:26,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:20:26,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-27 05:20:26,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:20:26,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:20:26,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1398143196, now seen corresponding path program 1 times [2023-08-27 05:20:26,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:20:26,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368735086] [2023-08-27 05:20:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:26,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:20:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:20:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:20:26,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:20:26,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368735086] [2023-08-27 05:20:26,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368735086] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 05:20:26,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 05:20:26,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 05:20:26,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279827868] [2023-08-27 05:20:26,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 05:20:26,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 05:20:26,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:20:26,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 05:20:26,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 05:20:26,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 452 [2023-08-27 05:20:26,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 85 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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) [2023-08-27 05:20:26,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:20:26,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 452 [2023-08-27 05:20:26,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:20:27,083 INFO L124 PetriNetUnfolderBase]: 650/1360 cut-off events. [2023-08-27 05:20:27,083 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:20:27,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 1360 events. 650/1360 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8090 event pairs, 550 based on Foata normal form. 170/1048 useless extension candidates. Maximal degree in co-relation 2521. Up to 1224 conditions per place. [2023-08-27 05:20:27,090 INFO L140 encePairwiseOnDemand]: 427/452 looper letters, 31 selfloop transitions, 2 changer transitions 26/64 dead transitions. [2023-08-27 05:20:27,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 241 flow [2023-08-27 05:20:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 05:20:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 05:20:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 671 transitions. [2023-08-27 05:20:27,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4948377581120944 [2023-08-27 05:20:27,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 671 transitions. [2023-08-27 05:20:27,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 671 transitions. [2023-08-27 05:20:27,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:20:27,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 671 transitions. [2023-08-27 05:20:27,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 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) [2023-08-27 05:20:27,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 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) [2023-08-27 05:20:27,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 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) [2023-08-27 05:20:27,127 INFO L175 Difference]: Start difference. First operand has 62 places, 85 transitions, 175 flow. Second operand 3 states and 671 transitions. [2023-08-27 05:20:27,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 241 flow [2023-08-27 05:20:27,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 241 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 05:20:27,132 INFO L231 Difference]: Finished difference. Result has 64 places, 38 transitions, 91 flow [2023-08-27 05:20:27,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=64, PETRI_TRANSITIONS=38} [2023-08-27 05:20:27,137 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2023-08-27 05:20:27,137 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 38 transitions, 91 flow [2023-08-27 05:20:27,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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) [2023-08-27 05:20:27,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:20:27,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 05:20:27,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 05:20:27,139 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:20:27,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:20:27,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1311667557, now seen corresponding path program 1 times [2023-08-27 05:20:27,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:20:27,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521615186] [2023-08-27 05:20:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:27,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:20:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:20:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:20:27,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:20:27,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521615186] [2023-08-27 05:20:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521615186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:20:27,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152383498] [2023-08-27 05:20:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:27,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:20:27,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:20:27,226 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) [2023-08-27 05:20:27,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 05:20:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:20:27,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-27 05:20:27,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:20:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:20:27,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:20:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:20:27,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152383498] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:20:27,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:20:27,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 05:20:27,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160275151] [2023-08-27 05:20:27,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:20:27,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 05:20:27,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:20:27,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 05:20:27,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 05:20:27,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 452 [2023-08-27 05:20:27,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 38 transitions, 91 flow. Second operand has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 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) [2023-08-27 05:20:27,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:20:27,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 452 [2023-08-27 05:20:27,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:20:27,528 INFO L124 PetriNetUnfolderBase]: 123/289 cut-off events. [2023-08-27 05:20:27,528 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:20:27,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 289 events. 123/289 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1137 event pairs, 110 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 557. Up to 260 conditions per place. [2023-08-27 05:20:27,529 INFO L140 encePairwiseOnDemand]: 449/452 looper letters, 31 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-08-27 05:20:27,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 175 flow [2023-08-27 05:20:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 05:20:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 05:20:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1227 transitions. [2023-08-27 05:20:27,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524336283185841 [2023-08-27 05:20:27,533 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1227 transitions. [2023-08-27 05:20:27,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1227 transitions. [2023-08-27 05:20:27,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:20:27,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1227 transitions. [2023-08-27 05:20:27,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.5) internal successors, (1227), 6 states have internal predecessors, (1227), 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) [2023-08-27 05:20:27,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 452.0) internal successors, (3164), 7 states have internal predecessors, (3164), 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) [2023-08-27 05:20:27,544 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 452.0) internal successors, (3164), 7 states have internal predecessors, (3164), 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) [2023-08-27 05:20:27,544 INFO L175 Difference]: Start difference. First operand has 64 places, 38 transitions, 91 flow. Second operand 6 states and 1227 transitions. [2023-08-27 05:20:27,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 175 flow [2023-08-27 05:20:27,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 171 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 05:20:27,547 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 123 flow [2023-08-27 05:20:27,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=123, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-08-27 05:20:27,547 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -15 predicate places. [2023-08-27 05:20:27,548 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 123 flow [2023-08-27 05:20:27,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 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) [2023-08-27 05:20:27,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:20:27,549 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-27 05:20:27,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 05:20:27,755 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 [2023-08-27 05:20:27,756 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:20:27,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:20:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash 561254244, now seen corresponding path program 2 times [2023-08-27 05:20:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:20:27,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544610010] [2023-08-27 05:20:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:27,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:20:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:20:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:20:27,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:20:27,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544610010] [2023-08-27 05:20:27,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544610010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:20:27,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852108197] [2023-08-27 05:20:27,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 05:20:27,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:20:27,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:20:27,944 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) [2023-08-27 05:20:27,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 05:20:28,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 05:20:28,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 05:20:28,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 05:20:28,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:20:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:20:28,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:20:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:20:28,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852108197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:20:28,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:20:28,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 05:20:28,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802600983] [2023-08-27 05:20:28,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:20:28,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 05:20:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:20:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 05:20:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 05:20:28,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 452 [2023-08-27 05:20:28,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 123 flow. Second operand has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 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) [2023-08-27 05:20:28,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:20:28,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 452 [2023-08-27 05:20:28,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:20:28,242 INFO L124 PetriNetUnfolderBase]: 123/295 cut-off events. [2023-08-27 05:20:28,242 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-27 05:20:28,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 295 events. 123/295 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1137 event pairs, 110 based on Foata normal form. 6/183 useless extension candidates. Maximal degree in co-relation 548. Up to 260 conditions per place. [2023-08-27 05:20:28,244 INFO L140 encePairwiseOnDemand]: 449/452 looper letters, 31 selfloop transitions, 11 changer transitions 0/47 dead transitions. [2023-08-27 05:20:28,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 243 flow [2023-08-27 05:20:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 05:20:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 05:20:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2424 transitions. [2023-08-27 05:20:28,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469026548672566 [2023-08-27 05:20:28,251 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2424 transitions. [2023-08-27 05:20:28,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2424 transitions. [2023-08-27 05:20:28,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:20:28,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2424 transitions. [2023-08-27 05:20:28,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 202.0) internal successors, (2424), 12 states have internal predecessors, (2424), 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) [2023-08-27 05:20:28,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 452.0) internal successors, (5876), 13 states have internal predecessors, (5876), 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) [2023-08-27 05:20:28,270 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 452.0) internal successors, (5876), 13 states have internal predecessors, (5876), 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) [2023-08-27 05:20:28,270 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 123 flow. Second operand 12 states and 2424 transitions. [2023-08-27 05:20:28,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 243 flow [2023-08-27 05:20:28,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 229 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-27 05:20:28,272 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 193 flow [2023-08-27 05:20:28,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=193, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2023-08-27 05:20:28,273 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2023-08-27 05:20:28,273 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 193 flow [2023-08-27 05:20:28,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 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) [2023-08-27 05:20:28,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:20:28,274 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-27 05:20:28,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 05:20:28,479 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 [2023-08-27 05:20:28,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:20:28,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:20:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash -397172796, now seen corresponding path program 3 times [2023-08-27 05:20:28,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:20:28,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666510284] [2023-08-27 05:20:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:28,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:20:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:20:28,514 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:20:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:20:28,564 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:20:28,565 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:20:28,565 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:20:28,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 05:20:28,567 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-27 05:20:28,569 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:20:28,569 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:20:28,569 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-27 05:20:28,599 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 05:20:28,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 280 places, 326 transitions, 670 flow [2023-08-27 05:20:28,668 INFO L124 PetriNetUnfolderBase]: 87/561 cut-off events. [2023-08-27 05:20:28,668 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:20:28,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575 conditions, 561 events. 87/561 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2688 event pairs, 0 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 340. Up to 12 conditions per place. [2023-08-27 05:20:28,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 280 places, 326 transitions, 670 flow [2023-08-27 05:20:28,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 324 transitions, 666 flow [2023-08-27 05:20:28,681 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:20:28,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 324 transitions, 666 flow [2023-08-27 05:20:28,682 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 324 transitions, 666 flow [2023-08-27 05:20:28,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 324 transitions, 666 flow [2023-08-27 05:20:28,765 INFO L124 PetriNetUnfolderBase]: 87/559 cut-off events. [2023-08-27 05:20:28,765 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:20:28,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 559 events. 87/559 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2681 event pairs, 0 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 338. Up to 12 conditions per place. [2023-08-27 05:20:28,797 INFO L119 LiptonReduction]: Number of co-enabled transitions 54740 [2023-08-27 05:20:32,460 INFO L134 LiptonReduction]: Checked pairs total: 84242 [2023-08-27 05:20:32,460 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-08-27 05:20:32,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:20:32,462 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;@5ec2f14a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:20:32,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:20:32,475 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:20:32,475 INFO L124 PetriNetUnfolderBase]: 37/134 cut-off events. [2023-08-27 05:20:32,475 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 05:20:32,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:20:32,475 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 05:20:32,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:20:32,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:20:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash 873780132, now seen corresponding path program 1 times [2023-08-27 05:20:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:20:32,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983051313] [2023-08-27 05:20:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:32,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:20:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:20:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:20:32,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:20:32,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983051313] [2023-08-27 05:20:32,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983051313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 05:20:32,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 05:20:32,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 05:20:32,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536360178] [2023-08-27 05:20:32,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 05:20:32,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 05:20:32,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:20:32,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 05:20:32,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 05:20:32,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 605 [2023-08-27 05:20:32,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 131 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 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) [2023-08-27 05:20:32,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:20:32,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 605 [2023-08-27 05:20:32,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:20:36,345 INFO L124 PetriNetUnfolderBase]: 36138/54802 cut-off events. [2023-08-27 05:20:36,345 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-08-27 05:20:36,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107271 conditions, 54802 events. 36138/54802 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 1899. Compared 410968 event pairs, 32511 based on Foata normal form. 6026/40351 useless extension candidates. Maximal degree in co-relation 48427. Up to 52323 conditions per place. [2023-08-27 05:20:36,480 INFO L140 encePairwiseOnDemand]: 571/605 looper letters, 58 selfloop transitions, 2 changer transitions 34/101 dead transitions. [2023-08-27 05:20:36,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 101 transitions, 396 flow [2023-08-27 05:20:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 05:20:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 05:20:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 927 transitions. [2023-08-27 05:20:36,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107438016528926 [2023-08-27 05:20:36,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 927 transitions. [2023-08-27 05:20:36,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 927 transitions. [2023-08-27 05:20:36,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:20:36,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 927 transitions. [2023-08-27 05:20:36,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 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) [2023-08-27 05:20:36,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 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) [2023-08-27 05:20:36,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 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) [2023-08-27 05:20:36,490 INFO L175 Difference]: Start difference. First operand has 96 places, 131 transitions, 280 flow. Second operand 3 states and 927 transitions. [2023-08-27 05:20:36,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 101 transitions, 396 flow [2023-08-27 05:20:36,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 101 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 05:20:36,494 INFO L231 Difference]: Finished difference. Result has 99 places, 67 transitions, 156 flow [2023-08-27 05:20:36,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=99, PETRI_TRANSITIONS=67} [2023-08-27 05:20:36,495 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 3 predicate places. [2023-08-27 05:20:36,495 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 67 transitions, 156 flow [2023-08-27 05:20:36,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 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) [2023-08-27 05:20:36,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:20:36,495 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 05:20:36,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 05:20:36,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:20:36,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:20:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash -467796236, now seen corresponding path program 1 times [2023-08-27 05:20:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:20:36,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482215525] [2023-08-27 05:20:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:20:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:20:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:20:36,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:20:36,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482215525] [2023-08-27 05:20:36,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482215525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:20:36,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791876059] [2023-08-27 05:20:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:36,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:20:36,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:20:36,549 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) [2023-08-27 05:20:36,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 05:20:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:20:36,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-27 05:20:36,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:20:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:20:36,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:20:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:20:36,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791876059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:20:36,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:20:36,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 05:20:36,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151454564] [2023-08-27 05:20:36,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:20:36,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 05:20:36,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:20:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 05:20:36,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 05:20:36,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 605 [2023-08-27 05:20:36,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 67 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 270.7142857142857) internal successors, (1895), 7 states have internal predecessors, (1895), 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) [2023-08-27 05:20:36,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:20:36,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 605 [2023-08-27 05:20:36,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:20:37,544 INFO L124 PetriNetUnfolderBase]: 7016/10963 cut-off events. [2023-08-27 05:20:37,544 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-27 05:20:37,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21578 conditions, 10963 events. 7016/10963 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 71901 event pairs, 6451 based on Foata normal form. 0/6360 useless extension candidates. Maximal degree in co-relation 21565. Up to 10507 conditions per place. [2023-08-27 05:20:37,581 INFO L140 encePairwiseOnDemand]: 602/605 looper letters, 58 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-08-27 05:20:37,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 70 transitions, 294 flow [2023-08-27 05:20:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 05:20:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 05:20:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1680 transitions. [2023-08-27 05:20:37,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2023-08-27 05:20:37,585 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1680 transitions. [2023-08-27 05:20:37,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1680 transitions. [2023-08-27 05:20:37,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:20:37,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1680 transitions. [2023-08-27 05:20:37,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 280.0) internal successors, (1680), 6 states have internal predecessors, (1680), 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) [2023-08-27 05:20:37,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 605.0) internal successors, (4235), 7 states have internal predecessors, (4235), 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) [2023-08-27 05:20:37,595 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 605.0) internal successors, (4235), 7 states have internal predecessors, (4235), 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) [2023-08-27 05:20:37,595 INFO L175 Difference]: Start difference. First operand has 99 places, 67 transitions, 156 flow. Second operand 6 states and 1680 transitions. [2023-08-27 05:20:37,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 70 transitions, 294 flow [2023-08-27 05:20:37,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 288 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 05:20:37,597 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 186 flow [2023-08-27 05:20:37,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-08-27 05:20:37,598 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -20 predicate places. [2023-08-27 05:20:37,598 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 186 flow [2023-08-27 05:20:37,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 270.7142857142857) internal successors, (1895), 7 states have internal predecessors, (1895), 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) [2023-08-27 05:20:37,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:20:37,599 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 05:20:37,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 05:20:37,804 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 [2023-08-27 05:20:37,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:20:37,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:20:37,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2102581340, now seen corresponding path program 2 times [2023-08-27 05:20:37,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:20:37,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643512232] [2023-08-27 05:20:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:37,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:20:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:20:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:20:37,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:20:37,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643512232] [2023-08-27 05:20:37,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643512232] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:20:37,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951229406] [2023-08-27 05:20:37,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 05:20:37,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:20:37,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:20:37,948 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) [2023-08-27 05:20:37,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 05:20:38,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 05:20:38,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 05:20:38,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 05:20:38,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:20:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:20:38,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:20:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:20:38,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951229406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:20:38,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:20:38,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 05:20:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065240312] [2023-08-27 05:20:38,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:20:38,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 05:20:38,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:20:38,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 05:20:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 05:20:38,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 605 [2023-08-27 05:20:38,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 186 flow. Second operand has 13 states, 13 states have (on average 270.38461538461536) internal successors, (3515), 13 states have internal predecessors, (3515), 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) [2023-08-27 05:20:38,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:20:38,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 605 [2023-08-27 05:20:38,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:20:38,875 INFO L124 PetriNetUnfolderBase]: 7016/10969 cut-off events. [2023-08-27 05:20:38,875 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-08-27 05:20:38,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21608 conditions, 10969 events. 7016/10969 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 71884 event pairs, 6451 based on Foata normal form. 6/6373 useless extension candidates. Maximal degree in co-relation 21549. Up to 10507 conditions per place. [2023-08-27 05:20:38,905 INFO L140 encePairwiseOnDemand]: 602/605 looper letters, 58 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2023-08-27 05:20:38,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 76 transitions, 360 flow [2023-08-27 05:20:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 05:20:38,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 05:20:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3303 transitions. [2023-08-27 05:20:38,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549586776859504 [2023-08-27 05:20:38,915 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3303 transitions. [2023-08-27 05:20:38,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3303 transitions. [2023-08-27 05:20:38,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:20:38,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3303 transitions. [2023-08-27 05:20:38,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 275.25) internal successors, (3303), 12 states have internal predecessors, (3303), 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) [2023-08-27 05:20:38,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 605.0) internal successors, (7865), 13 states have internal predecessors, (7865), 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) [2023-08-27 05:20:38,933 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 605.0) internal successors, (7865), 13 states have internal predecessors, (7865), 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) [2023-08-27 05:20:38,933 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 186 flow. Second operand 12 states and 3303 transitions. [2023-08-27 05:20:38,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 76 transitions, 360 flow [2023-08-27 05:20:38,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 76 transitions, 346 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-27 05:20:38,938 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 256 flow [2023-08-27 05:20:38,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=256, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2023-08-27 05:20:38,939 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -4 predicate places. [2023-08-27 05:20:38,939 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 256 flow [2023-08-27 05:20:38,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 270.38461538461536) internal successors, (3515), 13 states have internal predecessors, (3515), 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) [2023-08-27 05:20:38,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:20:38,941 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 05:20:38,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 05:20:39,147 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 [2023-08-27 05:20:39,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:20:39,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:20:39,147 INFO L85 PathProgramCache]: Analyzing trace with hash -954800732, now seen corresponding path program 3 times [2023-08-27 05:20:39,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:20:39,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189721687] [2023-08-27 05:20:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:39,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:20:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:20:39,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:20:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:20:39,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:20:39,196 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:20:39,198 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:20:39,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 05:20:39,198 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-27 05:20:39,199 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:20:39,199 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:20:39,199 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-27 05:20:39,234 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 05:20:39,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 353 places, 413 transitions, 856 flow [2023-08-27 05:20:39,347 INFO L124 PetriNetUnfolderBase]: 127/825 cut-off events. [2023-08-27 05:20:39,347 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:20:39,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 825 events. 127/825 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4238 event pairs, 1 based on Foata normal form. 0/623 useless extension candidates. Maximal degree in co-relation 569. Up to 16 conditions per place. [2023-08-27 05:20:39,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 353 places, 413 transitions, 856 flow [2023-08-27 05:20:39,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 351 places, 411 transitions, 852 flow [2023-08-27 05:20:39,373 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:20:39,374 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 351 places, 411 transitions, 852 flow [2023-08-27 05:20:39,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 351 places, 411 transitions, 852 flow [2023-08-27 05:20:39,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 411 transitions, 852 flow [2023-08-27 05:20:39,484 INFO L124 PetriNetUnfolderBase]: 127/823 cut-off events. [2023-08-27 05:20:39,484 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:20:39,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 823 events. 127/823 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4238 event pairs, 1 based on Foata normal form. 0/623 useless extension candidates. Maximal degree in co-relation 567. Up to 16 conditions per place. [2023-08-27 05:20:39,538 INFO L119 LiptonReduction]: Number of co-enabled transitions 104550 [2023-08-27 05:20:43,863 INFO L134 LiptonReduction]: Checked pairs total: 182024 [2023-08-27 05:20:43,863 INFO L136 LiptonReduction]: Total number of compositions: 358 [2023-08-27 05:20:43,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:20:43,865 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5ec2f14a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:20:43,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:20:43,878 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:20:43,879 INFO L124 PetriNetUnfolderBase]: 64/224 cut-off events. [2023-08-27 05:20:43,879 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-27 05:20:43,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:20:43,879 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-27 05:20:43,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:20:43,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:20:43,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1158558321, now seen corresponding path program 1 times [2023-08-27 05:20:43,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:20:43,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782171117] [2023-08-27 05:20:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:43,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:20:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:20:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:20:43,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:20:43,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782171117] [2023-08-27 05:20:43,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782171117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 05:20:43,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 05:20:43,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 05:20:43,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542612527] [2023-08-27 05:20:43,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 05:20:43,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 05:20:43,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:20:43,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 05:20:43,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 05:20:43,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 771 [2023-08-27 05:20:43,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 172 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 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) [2023-08-27 05:20:43,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:20:43,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 771 [2023-08-27 05:20:43,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:22:34,080 INFO L124 PetriNetUnfolderBase]: 1103170/1512484 cut-off events. [2023-08-27 05:22:34,081 INFO L125 PetriNetUnfolderBase]: For 8133/8133 co-relation queries the response was YES. [2023-08-27 05:22:37,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950851 conditions, 1512484 events. 1103170/1512484 cut-off events. For 8133/8133 co-relation queries the response was YES. Maximal size of possible extension queue 41966. Compared 13286269 event pairs, 1009911 based on Foata normal form. 205942/1169906 useless extension candidates. Maximal degree in co-relation 387313. Up to 1434132 conditions per place. [2023-08-27 05:22:40,454 INFO L140 encePairwiseOnDemand]: 725/771 looper letters, 79 selfloop transitions, 2 changer transitions 35/130 dead transitions. [2023-08-27 05:22:40,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 130 transitions, 510 flow [2023-08-27 05:22:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 05:22:40,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 05:22:40,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1174 transitions. [2023-08-27 05:22:40,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075659316904453 [2023-08-27 05:22:40,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1174 transitions. [2023-08-27 05:22:40,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1174 transitions. [2023-08-27 05:22:40,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:22:40,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1174 transitions. [2023-08-27 05:22:40,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 391.3333333333333) internal successors, (1174), 3 states have internal predecessors, (1174), 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) [2023-08-27 05:22:40,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 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) [2023-08-27 05:22:40,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 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) [2023-08-27 05:22:40,480 INFO L175 Difference]: Start difference. First operand has 124 places, 172 transitions, 374 flow. Second operand 3 states and 1174 transitions. [2023-08-27 05:22:40,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 130 transitions, 510 flow [2023-08-27 05:22:40,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 130 transitions, 510 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 05:22:40,490 INFO L231 Difference]: Finished difference. Result has 127 places, 95 transitions, 221 flow [2023-08-27 05:22:40,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=127, PETRI_TRANSITIONS=95} [2023-08-27 05:22:40,491 INFO L281 CegarLoopForPetriNet]: 124 programPoint places, 3 predicate places. [2023-08-27 05:22:40,492 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 95 transitions, 221 flow [2023-08-27 05:22:40,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 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) [2023-08-27 05:22:40,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:22:40,492 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:22:40,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 05:22:40,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:22:40,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:22:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash -308809407, now seen corresponding path program 1 times [2023-08-27 05:22:40,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:22:40,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718479232] [2023-08-27 05:22:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:22:40,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:22:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:22:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:22:40,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:22:40,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718479232] [2023-08-27 05:22:40,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718479232] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:22:40,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359075197] [2023-08-27 05:22:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:22:40,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:22:40,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:22:40,573 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) [2023-08-27 05:22:40,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 05:22:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:22:40,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-27 05:22:40,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:22:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:22:40,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:22:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:22:40,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359075197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:22:40,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:22:40,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 05:22:40,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509233263] [2023-08-27 05:22:40,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:22:40,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 05:22:40,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:22:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 05:22:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 05:22:40,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 771 [2023-08-27 05:22:40,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 95 transitions, 221 flow. Second operand has 7 states, 7 states have (on average 341.85714285714283) internal successors, (2393), 7 states have internal predecessors, (2393), 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) [2023-08-27 05:22:40,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:22:40,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 771 [2023-08-27 05:22:40,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand