/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 23:13:10,763 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 23:13:10,843 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 [2023-08-23 23:13:10,848 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 23:13:10,848 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 23:13:10,877 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 23:13:10,878 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 23:13:10,878 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 23:13:10,879 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 23:13:10,882 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 23:13:10,882 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 23:13:10,883 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 23:13:10,883 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 23:13:10,884 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 23:13:10,884 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 23:13:10,884 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 23:13:10,885 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 23:13:10,885 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 23:13:10,885 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 23:13:10,885 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 23:13:10,885 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 23:13:10,886 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 23:13:10,886 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 23:13:10,887 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 23:13:10,887 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 23:13:10,887 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 23:13:10,888 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 23:13:10,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:13:10,888 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 23:13:10,888 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 23:13:10,889 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 23:13:10,889 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 23:13:10,889 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 23:13:10,890 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 23:13:10,890 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 23:13:10,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 23:13:11,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 23:13:11,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 23:13:11,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 23:13:11,189 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 23:13:11,191 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 23:13:11,192 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-23 23:13:12,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 23:13:12,702 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 23:13:12,703 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-23 23:13:12,731 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d20ea794/6636a7a9fda8407b875586a3471778e1/FLAGf96118216 [2023-08-23 23:13:12,745 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d20ea794/6636a7a9fda8407b875586a3471778e1 [2023-08-23 23:13:12,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 23:13:12,751 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 23:13:12,753 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 23:13:12,753 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 23:13:12,756 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 23:13:12,757 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:13:12" (1/1) ... [2023-08-23 23:13:12,758 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50086474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:12, skipping insertion in model container [2023-08-23 23:13:12,758 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:13:12" (1/1) ... [2023-08-23 23:13:12,820 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 23:13:13,375 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-08-23 23:13:13,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:13:13,391 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 23:13:13,403 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [127] [2023-08-23 23:13:13,412 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [573] [2023-08-23 23:13:13,412 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [574] [2023-08-23 23:13:13,450 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-08-23 23:13:13,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:13:13,556 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 23:13:13,556 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 23:13:13,561 INFO L206 MainTranslator]: Completed translation [2023-08-23 23:13:13,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13 WrapperNode [2023-08-23 23:13:13,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 23:13:13,563 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 23:13:13,563 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 23:13:13,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 23:13:13,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (1/1) ... [2023-08-23 23:13:13,599 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (1/1) ... [2023-08-23 23:13:13,631 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 286 [2023-08-23 23:13:13,632 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 23:13:13,632 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 23:13:13,632 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 23:13:13,632 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 23:13:13,640 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (1/1) ... [2023-08-23 23:13:13,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (1/1) ... [2023-08-23 23:13:13,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (1/1) ... [2023-08-23 23:13:13,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (1/1) ... [2023-08-23 23:13:13,661 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (1/1) ... [2023-08-23 23:13:13,664 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (1/1) ... [2023-08-23 23:13:13,668 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (1/1) ... [2023-08-23 23:13:13,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (1/1) ... [2023-08-23 23:13:13,675 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 23:13:13,676 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 23:13:13,676 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 23:13:13,676 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 23:13:13,677 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (1/1) ... [2023-08-23 23:13:13,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:13:13,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:13:13,710 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) [2023-08-23 23:13:13,721 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 [2023-08-23 23:13:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-23 23:13:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 23:13:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-23 23:13:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 23:13:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 23:13:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-08-23 23:13:13,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-08-23 23:13:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 23:13:13,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 23:13:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 23:13:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 23:13:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 23:13:13,750 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 23:13:13,967 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 23:13:13,969 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 23:13:14,308 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 23:13:14,352 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 23:13:14,353 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-23 23:13:14,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:13:14 BoogieIcfgContainer [2023-08-23 23:13:14,355 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 23:13:14,357 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 23:13:14,357 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 23:13:14,360 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 23:13:14,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 11:13:12" (1/3) ... [2023-08-23 23:13:14,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbaac0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:13:14, skipping insertion in model container [2023-08-23 23:13:14,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:13:13" (2/3) ... [2023-08-23 23:13:14,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbaac0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:13:14, skipping insertion in model container [2023-08-23 23:13:14,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:13:14" (3/3) ... [2023-08-23 23:13:14,362 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-08-23 23:13:14,394 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 23:13:14,394 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 23:13:14,394 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 23:13:14,472 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-23 23:13:14,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 251 transitions, 510 flow [2023-08-23 23:13:14,579 INFO L124 PetriNetUnfolderBase]: 19/265 cut-off events. [2023-08-23 23:13:14,579 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 23:13:14,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 265 events. 19/265 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 424 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 185. Up to 4 conditions per place. [2023-08-23 23:13:14,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 251 transitions, 510 flow [2023-08-23 23:13:14,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 246 transitions, 497 flow [2023-08-23 23:13:14,597 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:13:14,610 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 246 transitions, 497 flow [2023-08-23 23:13:14,612 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 246 transitions, 497 flow [2023-08-23 23:13:14,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 246 transitions, 497 flow [2023-08-23 23:13:14,663 INFO L124 PetriNetUnfolderBase]: 18/260 cut-off events. [2023-08-23 23:13:14,664 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:13:14,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 260 events. 18/260 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 382 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 185. Up to 4 conditions per place. [2023-08-23 23:13:14,673 INFO L119 LiptonReduction]: Number of co-enabled transitions 6640 [2023-08-23 23:13:21,520 INFO L134 LiptonReduction]: Checked pairs total: 6773 [2023-08-23 23:13:21,520 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-08-23 23:13:21,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:13:21,549 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;@60f834de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:13:21,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-23 23:13:21,553 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:13:21,553 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-23 23:13:21,553 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:13:21,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:13:21,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-23 23:13:21,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-23 23:13:21,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:13:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash 885226404, now seen corresponding path program 1 times [2023-08-23 23:13:21,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:13:21,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674028029] [2023-08-23 23:13:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:13:21,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:13:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:13:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 23:13:21,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:13:21,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674028029] [2023-08-23 23:13:21,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674028029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:13:21,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:13:21,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:13:21,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240919376] [2023-08-23 23:13:21,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:13:21,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:13:21,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:13:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:13:22,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:13:22,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 495 [2023-08-23 23:13:22,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 37 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:13:22,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:13:22,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 495 [2023-08-23 23:13:22,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:13:22,139 INFO L124 PetriNetUnfolderBase]: 82/168 cut-off events. [2023-08-23 23:13:22,139 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:13:22,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 168 events. 82/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 456 event pairs, 57 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 320. Up to 167 conditions per place. [2023-08-23 23:13:22,142 INFO L140 encePairwiseOnDemand]: 488/495 looper letters, 31 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-23 23:13:22,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 139 flow [2023-08-23 23:13:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:13:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:13:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 704 transitions. [2023-08-23 23:13:22,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2023-08-23 23:13:22,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 704 transitions. [2023-08-23 23:13:22,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 704 transitions. [2023-08-23 23:13:22,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:13:22,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 704 transitions. [2023-08-23 23:13:22,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 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) [2023-08-23 23:13:22,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:13:22,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:13:22,182 INFO L175 Difference]: Start difference. First operand has 30 places, 37 transitions, 79 flow. Second operand 3 states and 704 transitions. [2023-08-23 23:13:22,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 139 flow [2023-08-23 23:13:22,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:13:22,187 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 83 flow [2023-08-23 23:13:22,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2023-08-23 23:13:22,195 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-23 23:13:22,195 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 83 flow [2023-08-23 23:13:22,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:13:22,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:13:22,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-23 23:13:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 23:13:22,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-23 23:13:22,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:13:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash -669233556, now seen corresponding path program 1 times [2023-08-23 23:13:22,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:13:22,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214815269] [2023-08-23 23:13:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:13:22,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:13:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:13:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 23:13:22,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:13:22,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214815269] [2023-08-23 23:13:22,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214815269] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:13:22,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657401247] [2023-08-23 23:13:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:13:22,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:13:22,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:13:22,316 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) [2023-08-23 23:13:22,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-23 23:13:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:13:22,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-23 23:13:22,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:13:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 23:13:22,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:13:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 23:13:22,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657401247] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:13:22,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:13:22,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-23 23:13:22,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518068067] [2023-08-23 23:13:22,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:13:22,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-23 23:13:22,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:13:22,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-23 23:13:22,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-23 23:13:22,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 495 [2023-08-23 23:13:22,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 83 flow. Second operand has 8 states, 8 states have (on average 223.5) internal successors, (1788), 8 states have internal predecessors, (1788), 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) [2023-08-23 23:13:22,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:13:22,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 495 [2023-08-23 23:13:22,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:13:22,713 INFO L124 PetriNetUnfolderBase]: 82/169 cut-off events. [2023-08-23 23:13:22,713 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:13:22,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 169 events. 82/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 456 event pairs, 57 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 339. Up to 167 conditions per place. [2023-08-23 23:13:22,714 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 31 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-23 23:13:22,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 155 flow [2023-08-23 23:13:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 23:13:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 23:13:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 923 transitions. [2023-08-23 23:13:22,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46616161616161617 [2023-08-23 23:13:22,717 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 923 transitions. [2023-08-23 23:13:22,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 923 transitions. [2023-08-23 23:13:22,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:13:22,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 923 transitions. [2023-08-23 23:13:22,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 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) [2023-08-23 23:13:22,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 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) [2023-08-23 23:13:22,726 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 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) [2023-08-23 23:13:22,726 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 83 flow. Second operand 4 states and 923 transitions. [2023-08-23 23:13:22,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 155 flow [2023-08-23 23:13:22,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 151 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-23 23:13:22,727 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2023-08-23 23:13:22,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-08-23 23:13:22,728 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-23 23:13:22,728 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2023-08-23 23:13:22,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 223.5) internal successors, (1788), 8 states have internal predecessors, (1788), 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) [2023-08-23 23:13:22,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:13:22,730 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-23 23:13:22,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-23 23:13:22,937 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 [2023-08-23 23:13:22,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-23 23:13:22,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:13:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1612852060, now seen corresponding path program 2 times [2023-08-23 23:13:22,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:13:22,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558549849] [2023-08-23 23:13:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:13:22,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:13:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:13:22,973 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:13:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:13:23,033 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:13:23,034 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:13:23,034 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-23 23:13:23,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-23 23:13:23,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-23 23:13:23,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 23:13:23,037 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-23 23:13:23,038 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:13:23,038 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 23:13:23,116 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-23 23:13:23,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 394 places, 419 transitions, 856 flow [2023-08-23 23:13:23,202 INFO L124 PetriNetUnfolderBase]: 36/469 cut-off events. [2023-08-23 23:13:23,203 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-23 23:13:23,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 469 events. 36/469 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1473 event pairs, 0 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 364. Up to 8 conditions per place. [2023-08-23 23:13:23,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 394 places, 419 transitions, 856 flow [2023-08-23 23:13:23,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 394 places, 419 transitions, 856 flow [2023-08-23 23:13:23,213 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:13:23,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 394 places, 419 transitions, 856 flow [2023-08-23 23:13:23,213 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 394 places, 419 transitions, 856 flow [2023-08-23 23:13:23,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 394 places, 419 transitions, 856 flow [2023-08-23 23:13:23,288 INFO L124 PetriNetUnfolderBase]: 36/469 cut-off events. [2023-08-23 23:13:23,288 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-23 23:13:23,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 469 events. 36/469 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1473 event pairs, 0 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 364. Up to 8 conditions per place. [2023-08-23 23:13:23,322 INFO L119 LiptonReduction]: Number of co-enabled transitions 72044 [2023-08-23 23:13:32,529 INFO L134 LiptonReduction]: Checked pairs total: 79927 [2023-08-23 23:13:32,530 INFO L136 LiptonReduction]: Total number of compositions: 399 [2023-08-23 23:13:32,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:13:32,532 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;@60f834de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:13:32,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-23 23:13:32,535 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:13:32,535 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2023-08-23 23:13:32,535 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 23:13:32,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:13:32,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:13:32,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 23:13:32,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:13:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1441100765, now seen corresponding path program 1 times [2023-08-23 23:13:32,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:13:32,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214885352] [2023-08-23 23:13:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:13:32,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:13:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:13:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:13:32,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:13:32,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214885352] [2023-08-23 23:13:32,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214885352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:13:32,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:13:32,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:13:32,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656019379] [2023-08-23 23:13:32,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:13:32,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-23 23:13:32,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:13:32,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-23 23:13:32,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-23 23:13:32,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 386 out of 818 [2023-08-23 23:13:32,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 390.0) internal successors, (780), 2 states have internal predecessors, (780), 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) [2023-08-23 23:13:32,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:13:32,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 386 of 818 [2023-08-23 23:13:32,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:13:33,865 INFO L124 PetriNetUnfolderBase]: 9043/13268 cut-off events. [2023-08-23 23:13:33,865 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2023-08-23 23:13:33,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26641 conditions, 13268 events. 9043/13268 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 71868 event pairs, 7113 based on Foata normal form. 0/9668 useless extension candidates. Maximal degree in co-relation 21560. Up to 13230 conditions per place. [2023-08-23 23:13:33,942 INFO L140 encePairwiseOnDemand]: 812/818 looper letters, 74 selfloop transitions, 0 changer transitions 0/77 dead transitions. [2023-08-23 23:13:33,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 320 flow [2023-08-23 23:13:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-23 23:13:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-23 23:13:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 852 transitions. [2023-08-23 23:13:33,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5207823960880196 [2023-08-23 23:13:33,945 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 852 transitions. [2023-08-23 23:13:33,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 852 transitions. [2023-08-23 23:13:33,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:13:33,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 852 transitions. [2023-08-23 23:13:33,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 426.0) internal successors, (852), 2 states have internal predecessors, (852), 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) [2023-08-23 23:13:33,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 818.0) internal successors, (2454), 3 states have internal predecessors, (2454), 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) [2023-08-23 23:13:33,951 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 818.0) internal successors, (2454), 3 states have internal predecessors, (2454), 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) [2023-08-23 23:13:33,951 INFO L175 Difference]: Start difference. First operand has 67 places, 83 transitions, 184 flow. Second operand 2 states and 852 transitions. [2023-08-23 23:13:33,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 320 flow [2023-08-23 23:13:33,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:13:33,957 INFO L231 Difference]: Finished difference. Result has 68 places, 77 transitions, 172 flow [2023-08-23 23:13:33,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=172, PETRI_PLACES=68, PETRI_TRANSITIONS=77} [2023-08-23 23:13:33,959 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2023-08-23 23:13:33,959 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 77 transitions, 172 flow [2023-08-23 23:13:33,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 390.0) internal successors, (780), 2 states have internal predecessors, (780), 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) [2023-08-23 23:13:33,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:13:33,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:13:33,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 23:13:33,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 23:13:33,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:13:33,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1917532809, now seen corresponding path program 1 times [2023-08-23 23:13:33,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:13:33,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083063953] [2023-08-23 23:13:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:13:33,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:13:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:13:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:13:34,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:13:34,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083063953] [2023-08-23 23:13:34,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083063953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:13:34,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:13:34,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 23:13:34,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402018661] [2023-08-23 23:13:34,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:13:34,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:13:34,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:13:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:13:34,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:13:34,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 379 out of 818 [2023-08-23 23:13:34,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 382.3333333333333) internal successors, (1147), 3 states have internal predecessors, (1147), 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) [2023-08-23 23:13:34,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:13:34,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 379 of 818 [2023-08-23 23:13:34,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:13:35,867 INFO L124 PetriNetUnfolderBase]: 13420/19593 cut-off events. [2023-08-23 23:13:35,868 INFO L125 PetriNetUnfolderBase]: For 289/289 co-relation queries the response was YES. [2023-08-23 23:13:35,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39348 conditions, 19593 events. 13420/19593 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 110992 event pairs, 7113 based on Foata normal form. 0/14352 useless extension candidates. Maximal degree in co-relation 39343. Up to 13067 conditions per place. [2023-08-23 23:13:35,968 INFO L140 encePairwiseOnDemand]: 814/818 looper letters, 125 selfloop transitions, 3 changer transitions 0/131 dead transitions. [2023-08-23 23:13:35,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 131 transitions, 544 flow [2023-08-23 23:13:35,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:13:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:13:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1266 transitions. [2023-08-23 23:13:35,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158924205378973 [2023-08-23 23:13:35,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1266 transitions. [2023-08-23 23:13:35,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1266 transitions. [2023-08-23 23:13:35,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:13:35,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1266 transitions. [2023-08-23 23:13:35,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 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) [2023-08-23 23:13:35,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 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) [2023-08-23 23:13:35,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 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) [2023-08-23 23:13:35,983 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 172 flow. Second operand 3 states and 1266 transitions. [2023-08-23 23:13:35,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 131 transitions, 544 flow [2023-08-23 23:13:35,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 131 transitions, 544 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:13:35,988 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 198 flow [2023-08-23 23:13:35,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2023-08-23 23:13:35,989 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2023-08-23 23:13:35,990 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 198 flow [2023-08-23 23:13:35,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 382.3333333333333) internal successors, (1147), 3 states have internal predecessors, (1147), 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) [2023-08-23 23:13:35,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:13:35,991 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-23 23:13:35,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 23:13:35,991 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 23:13:35,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:13:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash -138826694, now seen corresponding path program 1 times [2023-08-23 23:13:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:13:35,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982937336] [2023-08-23 23:13:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:13:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:13:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:13:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 23:13:36,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:13:36,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982937336] [2023-08-23 23:13:36,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982937336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:13:36,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:13:36,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:13:36,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711867023] [2023-08-23 23:13:36,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:13:36,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:13:36,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:13:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:13:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:13:36,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 818 [2023-08-23 23:13:36,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 377.0) internal successors, (1131), 3 states have internal predecessors, (1131), 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) [2023-08-23 23:13:36,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:13:36,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 818 [2023-08-23 23:13:36,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:13:37,786 INFO L124 PetriNetUnfolderBase]: 13420/19606 cut-off events. [2023-08-23 23:13:37,786 INFO L125 PetriNetUnfolderBase]: For 1758/1758 co-relation queries the response was YES. [2023-08-23 23:13:37,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40994 conditions, 19606 events. 13420/19606 cut-off events. For 1758/1758 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 108884 event pairs, 10557 based on Foata normal form. 0/14854 useless extension candidates. Maximal degree in co-relation 40987. Up to 19563 conditions per place. [2023-08-23 23:13:37,869 INFO L140 encePairwiseOnDemand]: 815/818 looper letters, 76 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-23 23:13:37,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 81 transitions, 356 flow [2023-08-23 23:13:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:13:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:13:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1201 transitions. [2023-08-23 23:13:37,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48940505297473513 [2023-08-23 23:13:37,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1201 transitions. [2023-08-23 23:13:37,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1201 transitions. [2023-08-23 23:13:37,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:13:37,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1201 transitions. [2023-08-23 23:13:37,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 400.3333333333333) internal successors, (1201), 3 states have internal predecessors, (1201), 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) [2023-08-23 23:13:37,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 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) [2023-08-23 23:13:37,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 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) [2023-08-23 23:13:37,882 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 198 flow. Second operand 3 states and 1201 transitions. [2023-08-23 23:13:37,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 81 transitions, 356 flow [2023-08-23 23:13:37,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 23:13:37,910 INFO L231 Difference]: Finished difference. Result has 73 places, 81 transitions, 204 flow [2023-08-23 23:13:37,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=73, PETRI_TRANSITIONS=81} [2023-08-23 23:13:37,914 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 6 predicate places. [2023-08-23 23:13:37,914 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 81 transitions, 204 flow [2023-08-23 23:13:37,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 377.0) internal successors, (1131), 3 states have internal predecessors, (1131), 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) [2023-08-23 23:13:37,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:13:37,915 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-23 23:13:37,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 23:13:37,915 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 23:13:37,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:13:37,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1565482280, now seen corresponding path program 1 times [2023-08-23 23:13:37,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:13:37,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289805227] [2023-08-23 23:13:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:13:37,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:13:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:13:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 23:13:38,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:13:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289805227] [2023-08-23 23:13:38,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289805227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:13:38,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374741072] [2023-08-23 23:13:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:13:38,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:13:38,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:13:38,024 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) [2023-08-23 23:13:38,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-23 23:13:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:13:38,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-23 23:13:38,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:13:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 23:13:38,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:13:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 23:13:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374741072] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:13:38,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:13:38,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-23 23:13:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132502612] [2023-08-23 23:13:38,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:13:38,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-23 23:13:38,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:13:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-23 23:13:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-08-23 23:13:38,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 818 [2023-08-23 23:13:38,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 376.7142857142857) internal successors, (2637), 7 states have internal predecessors, (2637), 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) [2023-08-23 23:13:38,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:13:38,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 818 [2023-08-23 23:13:38,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:13:39,688 INFO L124 PetriNetUnfolderBase]: 13420/19607 cut-off events. [2023-08-23 23:13:39,688 INFO L125 PetriNetUnfolderBase]: For 974/974 co-relation queries the response was YES. [2023-08-23 23:13:39,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40514 conditions, 19607 events. 13420/19607 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 108851 event pairs, 10557 based on Foata normal form. 0/14692 useless extension candidates. Maximal degree in co-relation 40506. Up to 19563 conditions per place. [2023-08-23 23:13:39,769 INFO L140 encePairwiseOnDemand]: 815/818 looper letters, 76 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-08-23 23:13:39,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 82 transitions, 366 flow [2023-08-23 23:13:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 23:13:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 23:13:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1577 transitions. [2023-08-23 23:13:39,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4819682151589242 [2023-08-23 23:13:39,773 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1577 transitions. [2023-08-23 23:13:39,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1577 transitions. [2023-08-23 23:13:39,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:13:39,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1577 transitions. [2023-08-23 23:13:39,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 394.25) internal successors, (1577), 4 states have internal predecessors, (1577), 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) [2023-08-23 23:13:39,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 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) [2023-08-23 23:13:39,783 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 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) [2023-08-23 23:13:39,783 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 204 flow. Second operand 4 states and 1577 transitions. [2023-08-23 23:13:39,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 82 transitions, 366 flow [2023-08-23 23:13:39,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 82 transitions, 362 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-23 23:13:39,786 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 216 flow [2023-08-23 23:13:39,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2023-08-23 23:13:39,787 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2023-08-23 23:13:39,787 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 216 flow [2023-08-23 23:13:39,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 376.7142857142857) internal successors, (2637), 7 states have internal predecessors, (2637), 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) [2023-08-23 23:13:39,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:13:39,788 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-23 23:13:39,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-23 23:13:39,993 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,SelfDestructingSolverStorable6 [2023-08-23 23:13:39,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 23:13:39,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:13:39,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1452834810, now seen corresponding path program 2 times [2023-08-23 23:13:39,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:13:39,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631394682] [2023-08-23 23:13:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:13:39,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:13:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:13:40,033 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:13:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:13:40,070 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:13:40,070 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:13:40,071 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-23 23:13:40,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-23 23:13:40,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-23 23:13:40,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-23 23:13:40,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 23:13:40,071 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-23 23:13:40,072 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:13:40,072 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-23 23:13:40,141 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-23 23:13:40,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 587 transitions, 1204 flow [2023-08-23 23:13:40,285 INFO L124 PetriNetUnfolderBase]: 58/700 cut-off events. [2023-08-23 23:13:40,285 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-23 23:13:40,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 700 events. 58/700 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2972 event pairs, 1 based on Foata normal form. 0/635 useless extension candidates. Maximal degree in co-relation 558. Up to 16 conditions per place. [2023-08-23 23:13:40,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 551 places, 587 transitions, 1204 flow [2023-08-23 23:13:40,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 551 places, 587 transitions, 1204 flow [2023-08-23 23:13:40,310 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:13:40,310 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 551 places, 587 transitions, 1204 flow [2023-08-23 23:13:40,310 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 551 places, 587 transitions, 1204 flow [2023-08-23 23:13:40,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 587 transitions, 1204 flow [2023-08-23 23:13:40,439 INFO L124 PetriNetUnfolderBase]: 58/700 cut-off events. [2023-08-23 23:13:40,440 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-23 23:13:40,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 700 events. 58/700 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2972 event pairs, 1 based on Foata normal form. 0/635 useless extension candidates. Maximal degree in co-relation 558. Up to 16 conditions per place. [2023-08-23 23:13:40,514 INFO L119 LiptonReduction]: Number of co-enabled transitions 192228 [2023-08-23 23:13:52,012 INFO L134 LiptonReduction]: Checked pairs total: 216982 [2023-08-23 23:13:52,012 INFO L136 LiptonReduction]: Total number of compositions: 559 [2023-08-23 23:13:52,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:13:52,014 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;@60f834de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:13:52,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-23 23:13:52,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:13:52,016 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2023-08-23 23:13:52,016 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 23:13:52,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:13:52,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:13:52,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 23:13:52,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:13:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1445830384, now seen corresponding path program 1 times [2023-08-23 23:13:52,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:13:52,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956614579] [2023-08-23 23:13:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:13:52,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:13:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:13:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:13:52,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:13:52,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956614579] [2023-08-23 23:13:52,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956614579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:13:52,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:13:52,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:13:52,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076091954] [2023-08-23 23:13:52,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:13:52,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:13:52,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:13:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:13:52,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:13:52,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 1146 [2023-08-23 23:13:52,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 118 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 states have internal predecessors, (1592), 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) [2023-08-23 23:13:52,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:13:52,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 1146 [2023-08-23 23:13:52,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:14:22,981 INFO L124 PetriNetUnfolderBase]: 358125/466407 cut-off events. [2023-08-23 23:14:22,981 INFO L125 PetriNetUnfolderBase]: For 9780/9780 co-relation queries the response was YES. [2023-08-23 23:14:23,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 936866 conditions, 466407 events. 358125/466407 cut-off events. For 9780/9780 co-relation queries the response was YES. Maximal size of possible extension queue 7747. Compared 2934848 event pairs, 283483 based on Foata normal form. 0/344990 useless extension candidates. Maximal degree in co-relation 203666. Up to 465587 conditions per place. [2023-08-23 23:14:25,234 INFO L140 encePairwiseOnDemand]: 1134/1146 looper letters, 105 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-08-23 23:14:25,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 110 transitions, 464 flow [2023-08-23 23:14:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:14:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:14:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1701 transitions. [2023-08-23 23:14:25,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49476439790575916 [2023-08-23 23:14:25,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1701 transitions. [2023-08-23 23:14:25,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1701 transitions. [2023-08-23 23:14:25,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:14:25,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1701 transitions. [2023-08-23 23:14:25,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 567.0) internal successors, (1701), 3 states have internal predecessors, (1701), 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) [2023-08-23 23:14:25,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1146.0) internal successors, (4584), 4 states have internal predecessors, (4584), 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) [2023-08-23 23:14:25,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1146.0) internal successors, (4584), 4 states have internal predecessors, (4584), 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) [2023-08-23 23:14:25,249 INFO L175 Difference]: Start difference. First operand has 94 places, 118 transitions, 266 flow. Second operand 3 states and 1701 transitions. [2023-08-23 23:14:25,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 110 transitions, 464 flow [2023-08-23 23:14:25,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 110 transitions, 464 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:14:25,256 INFO L231 Difference]: Finished difference. Result has 97 places, 110 transitions, 260 flow [2023-08-23 23:14:25,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1146, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=97, PETRI_TRANSITIONS=110} [2023-08-23 23:14:25,256 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 3 predicate places. [2023-08-23 23:14:25,256 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 110 transitions, 260 flow [2023-08-23 23:14:25,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 states have internal predecessors, (1592), 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) [2023-08-23 23:14:25,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:14:25,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:14:25,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-23 23:14:25,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 23:14:25,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:14:25,258 INFO L85 PathProgramCache]: Analyzing trace with hash -240845292, now seen corresponding path program 1 times [2023-08-23 23:14:25,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:14:25,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39730386] [2023-08-23 23:14:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:14:25,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:14:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:14:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 23:14:25,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:14:25,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39730386] [2023-08-23 23:14:25,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39730386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:14:25,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:14:25,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 23:14:25,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988297224] [2023-08-23 23:14:25,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:14:25,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:14:25,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:14:25,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:14:25,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:14:25,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 1146 [2023-08-23 23:14:25,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 535.6666666666666) internal successors, (1607), 3 states have internal predecessors, (1607), 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) [2023-08-23 23:14:25,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:14:25,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 1146 [2023-08-23 23:14:25,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:15:10,130 INFO L124 PetriNetUnfolderBase]: 529407/687699 cut-off events. [2023-08-23 23:15:10,130 INFO L125 PetriNetUnfolderBase]: For 13605/13605 co-relation queries the response was YES. [2023-08-23 23:15:11,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381476 conditions, 687699 events. 529407/687699 cut-off events. For 13605/13605 co-relation queries the response was YES. Maximal size of possible extension queue 9719. Compared 4489920 event pairs, 283483 based on Foata normal form. 0/510560 useless extension candidates. Maximal degree in co-relation 1381462. Up to 461402 conditions per place. [2023-08-23 23:15:13,477 INFO L140 encePairwiseOnDemand]: 1142/1146 looper letters, 190 selfloop transitions, 3 changer transitions 0/196 dead transitions. [2023-08-23 23:15:13,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 196 transitions, 836 flow [2023-08-23 23:15:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:15:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:15:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1789 transitions. [2023-08-23 23:15:13,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203606748109366 [2023-08-23 23:15:13,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1789 transitions. [2023-08-23 23:15:13,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1789 transitions. [2023-08-23 23:15:13,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:15:13,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1789 transitions. [2023-08-23 23:15:13,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 596.3333333333334) internal successors, (1789), 3 states have internal predecessors, (1789), 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) [2023-08-23 23:15:13,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1146.0) internal successors, (4584), 4 states have internal predecessors, (4584), 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) [2023-08-23 23:15:13,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1146.0) internal successors, (4584), 4 states have internal predecessors, (4584), 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) [2023-08-23 23:15:13,493 INFO L175 Difference]: Start difference. First operand has 97 places, 110 transitions, 260 flow. Second operand 3 states and 1789 transitions. [2023-08-23 23:15:13,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 196 transitions, 836 flow [2023-08-23 23:15:13,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 196 transitions, 832 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-23 23:15:13,502 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 282 flow [2023-08-23 23:15:13,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1146, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=282, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2023-08-23 23:15:13,502 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 6 predicate places. [2023-08-23 23:15:13,502 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 282 flow [2023-08-23 23:15:13,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 535.6666666666666) internal successors, (1607), 3 states have internal predecessors, (1607), 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) [2023-08-23 23:15:13,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:15:13,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:15:13,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-23 23:15:13,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 23:15:13,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:15:13,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1781127375, now seen corresponding path program 1 times [2023-08-23 23:15:13,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:15:13,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167797968] [2023-08-23 23:15:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:15:13,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:15:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:15:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-23 23:15:13,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:15:13,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167797968] [2023-08-23 23:15:13,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167797968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:15:13,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:15:13,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:15:13,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222422625] [2023-08-23 23:15:13,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:15:13,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:15:13,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:15:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:15:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:15:13,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 1146 [2023-08-23 23:15:13,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 454.3333333333333) internal successors, (1363), 3 states have internal predecessors, (1363), 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) [2023-08-23 23:15:13,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:15:13,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 1146 [2023-08-23 23:15:13,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:16:09,973 INFO L124 PetriNetUnfolderBase]: 646718/842594 cut-off events. [2023-08-23 23:16:09,974 INFO L125 PetriNetUnfolderBase]: For 79006/79006 co-relation queries the response was YES. [2023-08-23 23:16:11,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1744176 conditions, 842594 events. 646718/842594 cut-off events. For 79006/79006 co-relation queries the response was YES. Maximal size of possible extension queue 12244. Compared 5634626 event pairs, 381444 based on Foata normal form. 0/649532 useless extension candidates. Maximal degree in co-relation 1744157. Up to 705596 conditions per place. [2023-08-23 23:16:14,272 INFO L140 encePairwiseOnDemand]: 1127/1146 looper letters, 171 selfloop transitions, 18 changer transitions 0/192 dead transitions. [2023-08-23 23:16:14,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 192 transitions, 851 flow [2023-08-23 23:16:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:16:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:16:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1533 transitions. [2023-08-23 23:16:14,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44589877835951136 [2023-08-23 23:16:14,276 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1533 transitions. [2023-08-23 23:16:14,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1533 transitions. [2023-08-23 23:16:14,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:16:14,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1533 transitions. [2023-08-23 23:16:14,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 511.0) internal successors, (1533), 3 states have internal predecessors, (1533), 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) [2023-08-23 23:16:14,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1146.0) internal successors, (4584), 4 states have internal predecessors, (4584), 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) [2023-08-23 23:16:14,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1146.0) internal successors, (4584), 4 states have internal predecessors, (4584), 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) [2023-08-23 23:16:14,286 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 282 flow. Second operand 3 states and 1533 transitions. [2023-08-23 23:16:14,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 192 transitions, 851 flow [2023-08-23 23:16:16,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 192 transitions, 839 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 23:16:16,772 INFO L231 Difference]: Finished difference. Result has 102 places, 130 transitions, 420 flow [2023-08-23 23:16:16,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1146, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=420, PETRI_PLACES=102, PETRI_TRANSITIONS=130} [2023-08-23 23:16:16,773 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 8 predicate places. [2023-08-23 23:16:16,773 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 130 transitions, 420 flow [2023-08-23 23:16:16,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 454.3333333333333) internal successors, (1363), 3 states have internal predecessors, (1363), 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) [2023-08-23 23:16:16,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:16:16,773 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:16:16,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-23 23:16:16,773 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 23:16:16,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:16:16,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1159578007, now seen corresponding path program 1 times [2023-08-23 23:16:16,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:16:16,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243206071] [2023-08-23 23:16:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:16:16,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:16:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:16:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-23 23:16:16,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:16:16,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243206071] [2023-08-23 23:16:16,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243206071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:16:16,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401037890] [2023-08-23 23:16:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:16:16,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:16:16,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:16:16,867 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) [2023-08-23 23:16:16,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-23 23:16:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:16:17,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-23 23:16:17,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:16:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-23 23:16:17,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:16:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-23 23:16:17,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401037890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:16:17,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:16:17,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-23 23:16:17,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162920857] [2023-08-23 23:16:17,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:16:17,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-23 23:16:17,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:16:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-23 23:16:17,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-23 23:16:17,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 1146 [2023-08-23 23:16:17,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 130 transitions, 420 flow. Second operand has 8 states, 8 states have (on average 529.75) internal successors, (4238), 8 states have internal predecessors, (4238), 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) [2023-08-23 23:16:17,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:16:17,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 1146 [2023-08-23 23:16:17,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:17:20,540 INFO L124 PetriNetUnfolderBase]: 646718/842792 cut-off events. [2023-08-23 23:17:20,540 INFO L125 PetriNetUnfolderBase]: For 174856/174856 co-relation queries the response was YES. [2023-08-23 23:17:22,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938860 conditions, 842792 events. 646718/842792 cut-off events. For 174856/174856 co-relation queries the response was YES. Maximal size of possible extension queue 12299. Compared 5600554 event pairs, 483646 based on Foata normal form. 0/700163 useless extension candidates. Maximal degree in co-relation 1938837. Up to 841236 conditions per place. [2023-08-23 23:17:24,998 INFO L140 encePairwiseOnDemand]: 1143/1146 looper letters, 125 selfloop transitions, 3 changer transitions 0/131 dead transitions. [2023-08-23 23:17:24,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 131 transitions, 680 flow [2023-08-23 23:17:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 23:17:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 23:17:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2221 transitions. [2023-08-23 23:17:25,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48451134380453753 [2023-08-23 23:17:25,004 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2221 transitions. [2023-08-23 23:17:25,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2221 transitions. [2023-08-23 23:17:25,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:17:25,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2221 transitions. [2023-08-23 23:17:25,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 555.25) internal successors, (2221), 4 states have internal predecessors, (2221), 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) [2023-08-23 23:17:25,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1146.0) internal successors, (5730), 5 states have internal predecessors, (5730), 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) [2023-08-23 23:17:25,015 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1146.0) internal successors, (5730), 5 states have internal predecessors, (5730), 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) [2023-08-23 23:17:25,015 INFO L175 Difference]: Start difference. First operand has 102 places, 130 transitions, 420 flow. Second operand 4 states and 2221 transitions. [2023-08-23 23:17:25,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 131 transitions, 680 flow [2023-08-23 23:17:50,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 131 transitions, 644 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 23:17:50,424 INFO L231 Difference]: Finished difference. Result has 104 places, 131 transitions, 400 flow [2023-08-23 23:17:50,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1146, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=400, PETRI_PLACES=104, PETRI_TRANSITIONS=131} [2023-08-23 23:17:50,425 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 10 predicate places. [2023-08-23 23:17:50,425 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 131 transitions, 400 flow [2023-08-23 23:17:50,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 529.75) internal successors, (4238), 8 states have internal predecessors, (4238), 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) [2023-08-23 23:17:50,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:17:50,426 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-08-23 23:17:50,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-23 23:17:50,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:17:50,631 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 23:17:50,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:17:50,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1714172208, now seen corresponding path program 2 times [2023-08-23 23:17:50,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:17:50,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168765485] [2023-08-23 23:17:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:17:50,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:17:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:17:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-23 23:17:50,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:17:50,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168765485] [2023-08-23 23:17:50,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168765485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:17:50,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256991381] [2023-08-23 23:17:50,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 23:17:50,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:17:50,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:17:50,758 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) [2023-08-23 23:17:50,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-23 23:17:50,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 23:17:50,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 23:17:50,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-23 23:17:50,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:17:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-23 23:17:50,983 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-23 23:17:50,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256991381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:17:50,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-23 23:17:50,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-08-23 23:17:50,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120428727] [2023-08-23 23:17:50,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:17:50,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 23:17:50,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:17:50,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 23:17:50,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-23 23:17:50,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 1146 [2023-08-23 23:17:50,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 131 transitions, 400 flow. Second operand has 6 states, 6 states have (on average 527.1666666666666) internal successors, (3163), 6 states have internal predecessors, (3163), 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) [2023-08-23 23:17:50,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:17:50,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 1146 [2023-08-23 23:17:50,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand