/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.data.races.in.concurrent.programs true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 18:21:45,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 18:21:45,383 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-25 18:21:45,389 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 18:21:45,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 18:21:45,412 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 18:21:45,413 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 18:21:45,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 18:21:45,413 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 18:21:45,416 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 18:21:45,416 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 18:21:45,416 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 18:21:45,417 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 18:21:45,417 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 18:21:45,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 18:21:45,418 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 18:21:45,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 18:21:45,418 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 18:21:45,418 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 18:21:45,418 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 18:21:45,418 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 18:21:45,419 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 18:21:45,419 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 18:21:45,419 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 18:21:45,420 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 18:21:45,420 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 18:21:45,420 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 18:21:45,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:21:45,420 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 18:21:45,420 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 18:21:45,421 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 18:21:45,421 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 18:21:45,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 18:21:45,421 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 18:21:45,421 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 18:21:45,422 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 18:21:45,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 18:21:45,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 18:21:45,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 18:21:45,686 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 18:21:45,687 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 18:21:45,687 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-08-25 18:21:46,675 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 18:21:46,893 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 18:21:46,894 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-08-25 18:21:46,906 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb9ece0f5/c4e4b6fdcb3747f892bc2fa4cf8b3f47/FLAGb93345124 [2023-08-25 18:21:46,914 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb9ece0f5/c4e4b6fdcb3747f892bc2fa4cf8b3f47 [2023-08-25 18:21:46,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 18:21:46,917 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 18:21:46,918 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 18:21:46,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 18:21:46,919 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 18:21:46,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:21:46" (1/1) ... [2023-08-25 18:21:46,920 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27dae5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:46, skipping insertion in model container [2023-08-25 18:21:46,920 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:21:46" (1/1) ... [2023-08-25 18:21:46,952 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 18:21:47,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:21:47,271 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 18:21:47,298 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:21:47,299 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:21:47,304 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-25 18:21:47,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:21:47,374 INFO L206 MainTranslator]: Completed translation [2023-08-25 18:21:47,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47 WrapperNode [2023-08-25 18:21:47,375 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 18:21:47,376 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 18:21:47,376 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 18:21:47,376 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 18:21:47,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (1/1) ... [2023-08-25 18:21:47,405 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (1/1) ... [2023-08-25 18:21:47,459 INFO L138 Inliner]: procedures = 270, calls = 42, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 262 [2023-08-25 18:21:47,460 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 18:21:47,460 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 18:21:47,460 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 18:21:47,460 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 18:21:47,473 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (1/1) ... [2023-08-25 18:21:47,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (1/1) ... [2023-08-25 18:21:47,476 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (1/1) ... [2023-08-25 18:21:47,476 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (1/1) ... [2023-08-25 18:21:47,496 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (1/1) ... [2023-08-25 18:21:47,506 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (1/1) ... [2023-08-25 18:21:47,508 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (1/1) ... [2023-08-25 18:21:47,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (1/1) ... [2023-08-25 18:21:47,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 18:21:47,512 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 18:21:47,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 18:21:47,512 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 18:21:47,513 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (1/1) ... [2023-08-25 18:21:47,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:21:47,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:21:47,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-25 18:21:47,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-25 18:21:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 18:21:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 18:21:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-25 18:21:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 18:21:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-25 18:21:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 18:21:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-25 18:21:47,604 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-25 18:21:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 18:21:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 18:21:47,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 18:21:47,605 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-25 18:21:47,738 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 18:21:47,739 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 18:21:48,105 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 18:21:48,114 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 18:21:48,115 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-25 18:21:48,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:21:48 BoogieIcfgContainer [2023-08-25 18:21:48,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 18:21:48,118 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 18:21:48,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 18:21:48,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 18:21:48,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:21:46" (1/3) ... [2023-08-25 18:21:48,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b6aaec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:21:48, skipping insertion in model container [2023-08-25 18:21:48,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:47" (2/3) ... [2023-08-25 18:21:48,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b6aaec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:21:48, skipping insertion in model container [2023-08-25 18:21:48,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:21:48" (3/3) ... [2023-08-25 18:21:48,122 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-08-25 18:21:48,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 18:21:48,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-25 18:21:48,132 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 18:21:48,203 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-25 18:21:48,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 275 transitions, 558 flow [2023-08-25 18:21:48,301 INFO L124 PetriNetUnfolderBase]: 48/391 cut-off events. [2023-08-25 18:21:48,301 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-25 18:21:48,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 391 events. 48/391 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1646 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 227. Up to 8 conditions per place. [2023-08-25 18:21:48,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 275 transitions, 558 flow [2023-08-25 18:21:48,314 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 270 transitions, 545 flow [2023-08-25 18:21:48,316 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:21:48,321 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 270 transitions, 545 flow [2023-08-25 18:21:48,323 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 270 transitions, 545 flow [2023-08-25 18:21:48,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 270 transitions, 545 flow [2023-08-25 18:21:48,362 INFO L124 PetriNetUnfolderBase]: 47/386 cut-off events. [2023-08-25 18:21:48,363 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:21:48,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 386 events. 47/386 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1580 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 227. Up to 8 conditions per place. [2023-08-25 18:21:48,372 INFO L119 LiptonReduction]: Number of co-enabled transitions 25864 [2023-08-25 18:21:50,811 INFO L134 LiptonReduction]: Checked pairs total: 100941 [2023-08-25 18:21:50,812 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-08-25 18:21:50,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:21:50,825 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;@54baef78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:21:50,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:21:50,828 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:21:50,829 INFO L124 PetriNetUnfolderBase]: 9/40 cut-off events. [2023-08-25 18:21:50,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:21:50,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:50,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-25 18:21:50,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:50,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:50,832 INFO L85 PathProgramCache]: Analyzing trace with hash -609272732, now seen corresponding path program 1 times [2023-08-25 18:21:50,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:50,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315781546] [2023-08-25 18:21:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:50,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:21:50,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:50,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315781546] [2023-08-25 18:21:50,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315781546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 18:21:50,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 18:21:50,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 18:21:50,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384204784] [2023-08-25 18:21:50,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 18:21:50,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 18:21:50,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 18:21:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 18:21:50,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 455 [2023-08-25 18:21:50,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 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) [2023-08-25 18:21:50,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:50,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 455 [2023-08-25 18:21:50,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:21:51,208 INFO L124 PetriNetUnfolderBase]: 420/1608 cut-off events. [2023-08-25 18:21:51,208 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:21:51,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2435 conditions, 1608 events. 420/1608 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 11730 event pairs, 378 based on Foata normal form. 167/1608 useless extension candidates. Maximal degree in co-relation 2340. Up to 820 conditions per place. [2023-08-25 18:21:51,212 INFO L140 encePairwiseOnDemand]: 430/455 looper letters, 24 selfloop transitions, 2 changer transitions 54/111 dead transitions. [2023-08-25 18:21:51,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 315 flow [2023-08-25 18:21:51,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 18:21:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 18:21:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 769 transitions. [2023-08-25 18:21:51,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633699633699634 [2023-08-25 18:21:51,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 769 transitions. [2023-08-25 18:21:51,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 769 transitions. [2023-08-25 18:21:51,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:21:51,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 769 transitions. [2023-08-25 18:21:51,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 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) [2023-08-25 18:21:51,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 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) [2023-08-25 18:21:51,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 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) [2023-08-25 18:21:51,262 INFO L175 Difference]: Start difference. First operand has 111 places, 132 transitions, 269 flow. Second operand 3 states and 769 transitions. [2023-08-25 18:21:51,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 315 flow [2023-08-25 18:21:51,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 111 transitions, 315 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 18:21:51,266 INFO L231 Difference]: Finished difference. Result has 113 places, 57 transitions, 129 flow [2023-08-25 18:21:51,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=113, PETRI_TRANSITIONS=57} [2023-08-25 18:21:51,269 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, 2 predicate places. [2023-08-25 18:21:51,269 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 57 transitions, 129 flow [2023-08-25 18:21:51,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 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) [2023-08-25 18:21:51,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:51,269 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-25 18:21:51,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 18:21:51,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:51,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1695489597, now seen corresponding path program 1 times [2023-08-25 18:21:51,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:51,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268256094] [2023-08-25 18:21:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:51,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:21:51,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:51,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268256094] [2023-08-25 18:21:51,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268256094] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:21:51,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713485018] [2023-08-25 18:21:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:51,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:21:51,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:21:51,325 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) [2023-08-25 18:21:51,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-25 18:21:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:51,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-25 18:21:51,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:21:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:21:51,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:21:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:21:51,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713485018] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:21:51,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:21:51,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-25 18:21:51,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388345220] [2023-08-25 18:21:51,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:21:51,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-25 18:21:51,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:51,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-25 18:21:51,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-25 18:21:51,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 455 [2023-08-25 18:21:51,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 57 transitions, 129 flow. Second operand has 7 states, 7 states have (on average 235.57142857142858) internal successors, (1649), 7 states have internal predecessors, (1649), 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) [2023-08-25 18:21:51,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:51,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 455 [2023-08-25 18:21:51,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:21:51,722 INFO L124 PetriNetUnfolderBase]: 59/261 cut-off events. [2023-08-25 18:21:51,722 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:21:51,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 261 events. 59/261 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 908 event pairs, 54 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 405. Up to 136 conditions per place. [2023-08-25 18:21:51,723 INFO L140 encePairwiseOnDemand]: 452/455 looper letters, 24 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-08-25 18:21:51,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 199 flow [2023-08-25 18:21:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-25 18:21:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-25 18:21:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1436 transitions. [2023-08-25 18:21:51,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526007326007326 [2023-08-25 18:21:51,726 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1436 transitions. [2023-08-25 18:21:51,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1436 transitions. [2023-08-25 18:21:51,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:21:51,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1436 transitions. [2023-08-25 18:21:51,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 239.33333333333334) internal successors, (1436), 6 states have internal predecessors, (1436), 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) [2023-08-25 18:21:51,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 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) [2023-08-25 18:21:51,733 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 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) [2023-08-25 18:21:51,733 INFO L175 Difference]: Start difference. First operand has 113 places, 57 transitions, 129 flow. Second operand 6 states and 1436 transitions. [2023-08-25 18:21:51,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 199 flow [2023-08-25 18:21:51,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 195 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-25 18:21:51,735 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 161 flow [2023-08-25 18:21:51,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=161, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-08-25 18:21:51,736 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -44 predicate places. [2023-08-25 18:21:51,736 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 161 flow [2023-08-25 18:21:51,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 235.57142857142858) internal successors, (1649), 7 states have internal predecessors, (1649), 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) [2023-08-25 18:21:51,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:51,737 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-25 18:21:51,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-25 18:21:51,942 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 [2023-08-25 18:21:51,943 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:51,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:51,943 INFO L85 PathProgramCache]: Analyzing trace with hash 629500580, now seen corresponding path program 2 times [2023-08-25 18:21:51,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:51,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661462678] [2023-08-25 18:21:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:51,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:21:52,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:52,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661462678] [2023-08-25 18:21:52,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661462678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:21:52,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651910265] [2023-08-25 18:21:52,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-25 18:21:52,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:21:52,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:21:52,024 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) [2023-08-25 18:21:52,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-25 18:21:52,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-25 18:21:52,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-25 18:21:52,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-25 18:21:52,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:21:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:21:52,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:21:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:21:52,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651910265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:21:52,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:21:52,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-25 18:21:52,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778713850] [2023-08-25 18:21:52,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:21:52,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-25 18:21:52,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-25 18:21:52,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-25 18:21:52,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 455 [2023-08-25 18:21:52,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 161 flow. Second operand has 13 states, 13 states have (on average 235.30769230769232) internal successors, (3059), 13 states have internal predecessors, (3059), 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) [2023-08-25 18:21:52,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:52,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 455 [2023-08-25 18:21:52,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:21:52,241 INFO L124 PetriNetUnfolderBase]: 59/267 cut-off events. [2023-08-25 18:21:52,242 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-25 18:21:52,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 267 events. 59/267 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 908 event pairs, 54 based on Foata normal form. 6/245 useless extension candidates. Maximal degree in co-relation 396. Up to 136 conditions per place. [2023-08-25 18:21:52,243 INFO L140 encePairwiseOnDemand]: 452/455 looper letters, 24 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2023-08-25 18:21:52,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 66 transitions, 267 flow [2023-08-25 18:21:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-25 18:21:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-25 18:21:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2849 transitions. [2023-08-25 18:21:52,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217948717948718 [2023-08-25 18:21:52,248 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2849 transitions. [2023-08-25 18:21:52,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2849 transitions. [2023-08-25 18:21:52,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:21:52,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2849 transitions. [2023-08-25 18:21:52,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 237.41666666666666) internal successors, (2849), 12 states have internal predecessors, (2849), 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) [2023-08-25 18:21:52,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 455.0) internal successors, (5915), 13 states have internal predecessors, (5915), 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) [2023-08-25 18:21:52,260 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 455.0) internal successors, (5915), 13 states have internal predecessors, (5915), 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) [2023-08-25 18:21:52,260 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 161 flow. Second operand 12 states and 2849 transitions. [2023-08-25 18:21:52,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 66 transitions, 267 flow [2023-08-25 18:21:52,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 66 transitions, 253 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-25 18:21:52,262 INFO L231 Difference]: Finished difference. Result has 83 places, 66 transitions, 231 flow [2023-08-25 18:21:52,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=231, PETRI_PLACES=83, PETRI_TRANSITIONS=66} [2023-08-25 18:21:52,263 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -28 predicate places. [2023-08-25 18:21:52,263 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 66 transitions, 231 flow [2023-08-25 18:21:52,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 235.30769230769232) internal successors, (3059), 13 states have internal predecessors, (3059), 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) [2023-08-25 18:21:52,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:52,265 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-25 18:21:52,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-25 18:21:52,470 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 [2023-08-25 18:21:52,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:52,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:52,470 INFO L85 PathProgramCache]: Analyzing trace with hash -566651900, now seen corresponding path program 3 times [2023-08-25 18:21:52,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:52,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191430917] [2023-08-25 18:21:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:52,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:21:52,506 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:21:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:21:52,538 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:21:52,539 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:21:52,539 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:21:52,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 18:21:52,540 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-25 18:21:52,542 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:21:52,542 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:21:52,542 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 18:21:52,591 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-25 18:21:52,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 383 transitions, 784 flow [2023-08-25 18:21:52,656 INFO L124 PetriNetUnfolderBase]: 80/646 cut-off events. [2023-08-25 18:21:52,656 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:21:52,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 646 events. 80/646 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3301 event pairs, 0 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 393. Up to 12 conditions per place. [2023-08-25 18:21:52,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 340 places, 383 transitions, 784 flow [2023-08-25 18:21:52,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 340 places, 383 transitions, 784 flow [2023-08-25 18:21:52,665 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:21:52,665 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 340 places, 383 transitions, 784 flow [2023-08-25 18:21:52,665 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 340 places, 383 transitions, 784 flow [2023-08-25 18:21:52,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 383 transitions, 784 flow [2023-08-25 18:21:52,732 INFO L124 PetriNetUnfolderBase]: 80/646 cut-off events. [2023-08-25 18:21:52,733 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:21:52,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 646 events. 80/646 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3301 event pairs, 0 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 393. Up to 12 conditions per place. [2023-08-25 18:21:52,755 INFO L119 LiptonReduction]: Number of co-enabled transitions 76532 [2023-08-25 18:21:55,646 INFO L134 LiptonReduction]: Checked pairs total: 303898 [2023-08-25 18:21:55,646 INFO L136 LiptonReduction]: Total number of compositions: 250 [2023-08-25 18:21:55,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:21:55,652 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;@54baef78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:21:55,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:21:55,663 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:21:55,663 INFO L124 PetriNetUnfolderBase]: 22/125 cut-off events. [2023-08-25 18:21:55,663 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 18:21:55,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:55,663 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-25 18:21:55,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:55,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:55,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1612728233, now seen corresponding path program 1 times [2023-08-25 18:21:55,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:55,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241143492] [2023-08-25 18:21:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:55,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:21:55,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:55,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241143492] [2023-08-25 18:21:55,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241143492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 18:21:55,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 18:21:55,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 18:21:55,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459974572] [2023-08-25 18:21:55,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 18:21:55,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 18:21:55,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 18:21:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 18:21:55,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 633 [2023-08-25 18:21:55,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 196 transitions, 410 flow. Second operand has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 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) [2023-08-25 18:21:55,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:55,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 633 [2023-08-25 18:21:55,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:21:58,650 INFO L124 PetriNetUnfolderBase]: 17119/40364 cut-off events. [2023-08-25 18:21:58,650 INFO L125 PetriNetUnfolderBase]: For 182/233 co-relation queries the response was YES. [2023-08-25 18:21:58,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65243 conditions, 40364 events. 17119/40364 cut-off events. For 182/233 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 450551 event pairs, 15876 based on Foata normal form. 4610/40467 useless extension candidates. Maximal degree in co-relation 29495. Up to 24758 conditions per place. [2023-08-25 18:21:58,759 INFO L140 encePairwiseOnDemand]: 599/633 looper letters, 43 selfloop transitions, 2 changer transitions 59/166 dead transitions. [2023-08-25 18:21:58,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 166 transitions, 484 flow [2023-08-25 18:21:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 18:21:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 18:21:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1077 transitions. [2023-08-25 18:21:58,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5671406003159558 [2023-08-25 18:21:58,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1077 transitions. [2023-08-25 18:21:58,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1077 transitions. [2023-08-25 18:21:58,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:21:58,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1077 transitions. [2023-08-25 18:21:58,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 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) [2023-08-25 18:21:58,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 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) [2023-08-25 18:21:58,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 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) [2023-08-25 18:21:58,767 INFO L175 Difference]: Start difference. First operand has 164 places, 196 transitions, 410 flow. Second operand 3 states and 1077 transitions. [2023-08-25 18:21:58,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 166 transitions, 484 flow [2023-08-25 18:21:58,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 166 transitions, 484 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 18:21:58,772 INFO L231 Difference]: Finished difference. Result has 167 places, 107 transitions, 236 flow [2023-08-25 18:21:58,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=167, PETRI_TRANSITIONS=107} [2023-08-25 18:21:58,774 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 3 predicate places. [2023-08-25 18:21:58,774 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 107 transitions, 236 flow [2023-08-25 18:21:58,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 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) [2023-08-25 18:21:58,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:58,774 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-25 18:21:58,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 18:21:58,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:58,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:58,775 INFO L85 PathProgramCache]: Analyzing trace with hash -821426775, now seen corresponding path program 1 times [2023-08-25 18:21:58,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:58,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740577472] [2023-08-25 18:21:58,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:58,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:21:58,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:58,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740577472] [2023-08-25 18:21:58,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740577472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:21:58,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44388213] [2023-08-25 18:21:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:58,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:21:58,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:21:58,832 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) [2023-08-25 18:21:58,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-25 18:21:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:59,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-25 18:21:59,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:21:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:21:59,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:21:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:21:59,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44388213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:21:59,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:21:59,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-25 18:21:59,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162722205] [2023-08-25 18:21:59,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:21:59,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-25 18:21:59,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:59,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-25 18:21:59,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-25 18:21:59,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 633 [2023-08-25 18:21:59,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 107 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 327.7142857142857) internal successors, (2294), 7 states have internal predecessors, (2294), 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) [2023-08-25 18:21:59,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:59,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 633 [2023-08-25 18:21:59,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:21:59,501 INFO L124 PetriNetUnfolderBase]: 2601/6512 cut-off events. [2023-08-25 18:21:59,501 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-25 18:21:59,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10580 conditions, 6512 events. 2601/6512 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 55266 event pairs, 2448 based on Foata normal form. 0/5710 useless extension candidates. Maximal degree in co-relation 10567. Up to 3974 conditions per place. [2023-08-25 18:21:59,530 INFO L140 encePairwiseOnDemand]: 630/633 looper letters, 43 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2023-08-25 18:21:59,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 110 transitions, 344 flow [2023-08-25 18:21:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-25 18:21:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-25 18:21:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2007 transitions. [2023-08-25 18:21:59,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284360189573459 [2023-08-25 18:21:59,534 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2007 transitions. [2023-08-25 18:21:59,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2007 transitions. [2023-08-25 18:21:59,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:21:59,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2007 transitions. [2023-08-25 18:21:59,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 334.5) internal successors, (2007), 6 states have internal predecessors, (2007), 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) [2023-08-25 18:21:59,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 633.0) internal successors, (4431), 7 states have internal predecessors, (4431), 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) [2023-08-25 18:21:59,543 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 633.0) internal successors, (4431), 7 states have internal predecessors, (4431), 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) [2023-08-25 18:21:59,543 INFO L175 Difference]: Start difference. First operand has 167 places, 107 transitions, 236 flow. Second operand 6 states and 2007 transitions. [2023-08-25 18:21:59,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 110 transitions, 344 flow [2023-08-25 18:21:59,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 110 transitions, 338 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-25 18:21:59,548 INFO L231 Difference]: Finished difference. Result has 118 places, 110 transitions, 266 flow [2023-08-25 18:21:59,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=118, PETRI_TRANSITIONS=110} [2023-08-25 18:21:59,551 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, -46 predicate places. [2023-08-25 18:21:59,551 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 110 transitions, 266 flow [2023-08-25 18:21:59,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 327.7142857142857) internal successors, (2294), 7 states have internal predecessors, (2294), 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) [2023-08-25 18:21:59,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:59,552 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-25 18:21:59,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-25 18:21:59,756 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 [2023-08-25 18:21:59,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:59,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:59,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1051819223, now seen corresponding path program 2 times [2023-08-25 18:21:59,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:59,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529856993] [2023-08-25 18:21:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:59,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:21:59,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:59,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529856993] [2023-08-25 18:21:59,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529856993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:21:59,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693168461] [2023-08-25 18:21:59,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-25 18:21:59,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:21:59,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:21:59,861 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) [2023-08-25 18:21:59,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-25 18:21:59,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-25 18:21:59,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-25 18:21:59,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-25 18:21:59,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:21:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:21:59,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:21:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:21:59,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693168461] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:21:59,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:21:59,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-25 18:21:59,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548448690] [2023-08-25 18:21:59,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:21:59,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-25 18:21:59,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:59,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-25 18:21:59,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-25 18:21:59,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 633 [2023-08-25 18:21:59,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 110 transitions, 266 flow. Second operand has 13 states, 13 states have (on average 327.38461538461536) internal successors, (4256), 13 states have internal predecessors, (4256), 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) [2023-08-25 18:21:59,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:59,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 633 [2023-08-25 18:21:59,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:22:00,567 INFO L124 PetriNetUnfolderBase]: 2601/6518 cut-off events. [2023-08-25 18:22:00,567 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-08-25 18:22:00,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10608 conditions, 6518 events. 2601/6518 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 55225 event pairs, 2448 based on Foata normal form. 6/5723 useless extension candidates. Maximal degree in co-relation 10549. Up to 3974 conditions per place. [2023-08-25 18:22:00,592 INFO L140 encePairwiseOnDemand]: 630/633 looper letters, 43 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2023-08-25 18:22:00,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 116 transitions, 410 flow [2023-08-25 18:22:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-25 18:22:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-25 18:22:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3972 transitions. [2023-08-25 18:22:00,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229067930489731 [2023-08-25 18:22:00,599 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3972 transitions. [2023-08-25 18:22:00,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3972 transitions. [2023-08-25 18:22:00,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:22:00,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3972 transitions. [2023-08-25 18:22:00,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 331.0) internal successors, (3972), 12 states have internal predecessors, (3972), 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) [2023-08-25 18:22:00,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 633.0) internal successors, (8229), 13 states have internal predecessors, (8229), 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) [2023-08-25 18:22:00,613 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 633.0) internal successors, (8229), 13 states have internal predecessors, (8229), 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) [2023-08-25 18:22:00,613 INFO L175 Difference]: Start difference. First operand has 118 places, 110 transitions, 266 flow. Second operand 12 states and 3972 transitions. [2023-08-25 18:22:00,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 116 transitions, 410 flow [2023-08-25 18:22:00,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 116 transitions, 396 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-25 18:22:00,616 INFO L231 Difference]: Finished difference. Result has 134 places, 116 transitions, 336 flow [2023-08-25 18:22:00,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=336, PETRI_PLACES=134, PETRI_TRANSITIONS=116} [2023-08-25 18:22:00,616 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, -30 predicate places. [2023-08-25 18:22:00,616 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 116 transitions, 336 flow [2023-08-25 18:22:00,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 327.38461538461536) internal successors, (4256), 13 states have internal predecessors, (4256), 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) [2023-08-25 18:22:00,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:22:00,618 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-25 18:22:00,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-25 18:22:00,822 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 [2023-08-25 18:22:00,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:22:00,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:22:00,823 INFO L85 PathProgramCache]: Analyzing trace with hash -316118121, now seen corresponding path program 3 times [2023-08-25 18:22:00,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:22:00,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162153192] [2023-08-25 18:22:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:22:00,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:22:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:22:00,850 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:22:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:22:00,879 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:22:00,880 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:22:00,880 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:22:00,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 18:22:00,880 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-25 18:22:00,881 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:22:00,881 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:22:00,881 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 18:22:00,922 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-25 18:22:00,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 435 places, 491 transitions, 1012 flow [2023-08-25 18:22:01,040 INFO L124 PetriNetUnfolderBase]: 117/946 cut-off events. [2023-08-25 18:22:01,040 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:22:01,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 946 events. 117/946 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5308 event pairs, 1 based on Foata normal form. 0/775 useless extension candidates. Maximal degree in co-relation 654. Up to 16 conditions per place. [2023-08-25 18:22:01,057 INFO L82 GeneralOperation]: Start removeDead. Operand has 435 places, 491 transitions, 1012 flow [2023-08-25 18:22:01,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 435 places, 491 transitions, 1012 flow [2023-08-25 18:22:01,064 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:22:01,064 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 435 places, 491 transitions, 1012 flow [2023-08-25 18:22:01,064 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 435 places, 491 transitions, 1012 flow [2023-08-25 18:22:01,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 435 places, 491 transitions, 1012 flow [2023-08-25 18:22:01,221 INFO L124 PetriNetUnfolderBase]: 117/946 cut-off events. [2023-08-25 18:22:01,221 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:22:01,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 946 events. 117/946 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5308 event pairs, 1 based on Foata normal form. 0/775 useless extension candidates. Maximal degree in co-relation 654. Up to 16 conditions per place. [2023-08-25 18:22:01,282 INFO L119 LiptonReduction]: Number of co-enabled transitions 149460 [2023-08-25 18:22:04,735 INFO L134 LiptonReduction]: Checked pairs total: 604498 [2023-08-25 18:22:04,735 INFO L136 LiptonReduction]: Total number of compositions: 325 [2023-08-25 18:22:04,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:22:04,737 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;@54baef78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:22:04,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:22:04,752 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:22:04,752 INFO L124 PetriNetUnfolderBase]: 41/226 cut-off events. [2023-08-25 18:22:04,752 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-25 18:22:04,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:22:04,752 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-25 18:22:04,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:22:04,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:22:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2082169347, now seen corresponding path program 1 times [2023-08-25 18:22:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:22:04,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265035618] [2023-08-25 18:22:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:22:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:22:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:22:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:22:04,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:22:04,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265035618] [2023-08-25 18:22:04,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265035618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 18:22:04,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 18:22:04,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 18:22:04,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412323410] [2023-08-25 18:22:04,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 18:22:04,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 18:22:04,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:22:04,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 18:22:04,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 18:22:04,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 418 out of 816 [2023-08-25 18:22:04,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 258 transitions, 546 flow. Second operand has 3 states, 3 states have (on average 420.3333333333333) internal successors, (1261), 3 states have internal predecessors, (1261), 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) [2023-08-25 18:22:04,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:22:04,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 418 of 816 [2023-08-25 18:22:04,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:23:20,099 INFO L124 PetriNetUnfolderBase]: 493242/934340 cut-off events. [2023-08-25 18:23:20,099 INFO L125 PetriNetUnfolderBase]: For 5431/7173 co-relation queries the response was YES. [2023-08-25 18:23:22,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571642 conditions, 934340 events. 493242/934340 cut-off events. For 5431/7173 co-relation queries the response was YES. Maximal size of possible extension queue 21249. Compared 12594269 event pairs, 463987 based on Foata normal form. 116579/946731 useless extension candidates. Maximal degree in co-relation 328529. Up to 634351 conditions per place. [2023-08-25 18:23:23,997 INFO L140 encePairwiseOnDemand]: 770/816 looper letters, 62 selfloop transitions, 2 changer transitions 60/216 dead transitions. [2023-08-25 18:23:23,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 216 transitions, 636 flow [2023-08-25 18:23:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 18:23:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 18:23:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1385 transitions. [2023-08-25 18:23:24,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657679738562091 [2023-08-25 18:23:24,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1385 transitions. [2023-08-25 18:23:24,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1385 transitions. [2023-08-25 18:23:24,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:23:24,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1385 transitions. [2023-08-25 18:23:24,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 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) [2023-08-25 18:23:24,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 816.0) internal successors, (3264), 4 states have internal predecessors, (3264), 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) [2023-08-25 18:23:24,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 816.0) internal successors, (3264), 4 states have internal predecessors, (3264), 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) [2023-08-25 18:23:24,006 INFO L175 Difference]: Start difference. First operand has 214 places, 258 transitions, 546 flow. Second operand 3 states and 1385 transitions. [2023-08-25 18:23:24,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 216 transitions, 636 flow [2023-08-25 18:23:24,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 216 transitions, 636 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 18:23:24,019 INFO L231 Difference]: Finished difference. Result has 217 places, 156 transitions, 343 flow [2023-08-25 18:23:24,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=217, PETRI_TRANSITIONS=156} [2023-08-25 18:23:24,020 INFO L281 CegarLoopForPetriNet]: 214 programPoint places, 3 predicate places. [2023-08-25 18:23:24,020 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 156 transitions, 343 flow [2023-08-25 18:23:24,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 420.3333333333333) internal successors, (1261), 3 states have internal predecessors, (1261), 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) [2023-08-25 18:23:24,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:24,020 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:23:24,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-25 18:23:24,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:24,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2021042458, now seen corresponding path program 1 times [2023-08-25 18:23:24,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:24,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712598883] [2023-08-25 18:23:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:24,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:23:24,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:23:24,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712598883] [2023-08-25 18:23:24,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712598883] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:23:24,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081593298] [2023-08-25 18:23:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:24,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:23:24,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:23:24,080 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) [2023-08-25 18:23:24,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-25 18:23:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:24,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-25 18:23:24,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:23:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:23:24,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:23:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:23:24,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081593298] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:23:24,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:23:24,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-25 18:23:24,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970392193] [2023-08-25 18:23:24,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:23:24,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-25 18:23:24,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:23:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-25 18:23:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-25 18:23:24,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 418 out of 816 [2023-08-25 18:23:24,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 156 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 419.85714285714283) internal successors, (2939), 7 states have internal predecessors, (2939), 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) [2023-08-25 18:23:24,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:23:24,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 418 of 816 [2023-08-25 18:23:24,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:23:36,906 INFO L124 PetriNetUnfolderBase]: 78043/152751 cut-off events. [2023-08-25 18:23:36,906 INFO L125 PetriNetUnfolderBase]: For 2437/2437 co-relation queries the response was YES. [2023-08-25 18:23:37,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257403 conditions, 152751 events. 78043/152751 cut-off events. For 2437/2437 co-relation queries the response was YES. Maximal size of possible extension queue 3765. Compared 1747034 event pairs, 73926 based on Foata normal form. 0/133447 useless extension candidates. Maximal degree in co-relation 257389. Up to 102888 conditions per place. [2023-08-25 18:23:37,625 INFO L140 encePairwiseOnDemand]: 813/816 looper letters, 62 selfloop transitions, 5 changer transitions 0/159 dead transitions. [2023-08-25 18:23:37,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 159 transitions, 489 flow [2023-08-25 18:23:37,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-25 18:23:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-25 18:23:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2578 transitions. [2023-08-25 18:23:37,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265522875816994 [2023-08-25 18:23:37,650 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2578 transitions. [2023-08-25 18:23:37,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2578 transitions. [2023-08-25 18:23:37,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:23:37,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2578 transitions. [2023-08-25 18:23:37,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 429.6666666666667) internal successors, (2578), 6 states have internal predecessors, (2578), 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) [2023-08-25 18:23:37,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 816.0) internal successors, (5712), 7 states have internal predecessors, (5712), 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) [2023-08-25 18:23:37,659 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 816.0) internal successors, (5712), 7 states have internal predecessors, (5712), 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) [2023-08-25 18:23:37,659 INFO L175 Difference]: Start difference. First operand has 217 places, 156 transitions, 343 flow. Second operand 6 states and 2578 transitions. [2023-08-25 18:23:37,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 159 transitions, 489 flow [2023-08-25 18:23:37,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 159 transitions, 479 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-25 18:23:37,662 INFO L231 Difference]: Finished difference. Result has 168 places, 159 transitions, 369 flow [2023-08-25 18:23:37,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=369, PETRI_PLACES=168, PETRI_TRANSITIONS=159} [2023-08-25 18:23:37,662 INFO L281 CegarLoopForPetriNet]: 214 programPoint places, -46 predicate places. [2023-08-25 18:23:37,662 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 159 transitions, 369 flow [2023-08-25 18:23:37,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 419.85714285714283) internal successors, (2939), 7 states have internal predecessors, (2939), 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) [2023-08-25 18:23:37,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:37,663 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-25 18:23:37,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-25 18:23:37,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-25 18:23:37,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:37,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:37,879 INFO L85 PathProgramCache]: Analyzing trace with hash -496827709, now seen corresponding path program 2 times [2023-08-25 18:23:37,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:37,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461412153] [2023-08-25 18:23:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:37,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:23:37,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:23:37,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461412153] [2023-08-25 18:23:37,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461412153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:23:37,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955788181] [2023-08-25 18:23:37,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-25 18:23:37,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:23:37,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:23:37,980 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-25 18:23:37,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-25 18:23:38,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-25 18:23:38,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-25 18:23:38,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-25 18:23:38,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:23:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:23:38,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:23:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:23:38,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955788181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:23:38,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:23:38,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-25 18:23:38,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043838530] [2023-08-25 18:23:38,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:23:38,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-25 18:23:38,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:23:38,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-25 18:23:38,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-25 18:23:38,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 418 out of 816 [2023-08-25 18:23:38,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 159 transitions, 369 flow. Second operand has 13 states, 13 states have (on average 419.46153846153845) internal successors, (5453), 13 states have internal predecessors, (5453), 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) [2023-08-25 18:23:38,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:23:38,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 418 of 816 [2023-08-25 18:23:38,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand