/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-ext/35_double_lock_p3_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:50:45,687 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:50:45,750 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 22:50:45,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:50:45,753 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:50:45,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:50:45,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:50:45,781 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:50:45,781 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:50:45,784 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:50:45,784 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:50:45,785 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:50:45,785 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:50:45,785 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:50:45,785 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:50:45,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:50:45,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:50:45,786 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:50:45,786 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:50:45,786 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:50:45,786 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:50:45,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:50:45,787 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:50:45,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:50:45,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:50:45,787 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:50:45,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:50:45,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:50:45,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:50:45,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:50:45,788 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:50:45,788 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:50:45,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:50:45,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:50:45,789 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:50:45,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:50:46,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:50:46,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:50:46,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:50:46,076 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:50:46,077 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:50:46,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-08-23 22:50:47,073 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:50:47,275 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:50:47,275 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-08-23 22:50:47,287 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9b2935a7/be208e40773541be825008069c213ddf/FLAG1e33ca2dc [2023-08-23 22:50:47,296 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9b2935a7/be208e40773541be825008069c213ddf [2023-08-23 22:50:47,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:50:47,298 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:50:47,299 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:50:47,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:50:47,301 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:50:47,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,302 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4148a6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47, skipping insertion in model container [2023-08-23 22:50:47,302 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,324 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:50:47,522 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-ext/35_double_lock_p3_vs.i[30553,30566] [2023-08-23 22:50:47,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:50:47,535 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:50:47,559 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-23 22:50:47,560 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-23 22:50:47,566 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-ext/35_double_lock_p3_vs.i[30553,30566] [2023-08-23 22:50:47,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:50:47,599 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:50:47,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47 WrapperNode [2023-08-23 22:50:47,600 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:50:47,601 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:50:47,601 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:50:47,601 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:50:47,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,616 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,638 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 126 [2023-08-23 22:50:47,638 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:50:47,638 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:50:47,638 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:50:47,639 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:50:47,643 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,657 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,661 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,663 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,664 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,664 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,666 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:50:47,667 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:50:47,667 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:50:47,667 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:50:47,667 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (1/1) ... [2023-08-23 22:50:47,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:50:47,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:50:47,696 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 22:50:47,702 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 22:50:47,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 22:50:47,721 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-23 22:50:47,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-23 22:50:47,722 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-23 22:50:47,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-23 22:50:47,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:50:47,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:50:47,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:50:47,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:50:47,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:50:47,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:50:47,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:50:47,723 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 22:50:47,842 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:50:47,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:50:47,975 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:50:48,077 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:50:48,077 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-23 22:50:48,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:50:48 BoogieIcfgContainer [2023-08-23 22:50:48,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:50:48,080 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:50:48,080 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:50:48,082 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:50:48,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:50:47" (1/3) ... [2023-08-23 22:50:48,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6318a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:50:48, skipping insertion in model container [2023-08-23 22:50:48,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:50:47" (2/3) ... [2023-08-23 22:50:48,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6318a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:50:48, skipping insertion in model container [2023-08-23 22:50:48,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:50:48" (3/3) ... [2023-08-23 22:50:48,084 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-08-23 22:50:48,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:50:48,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 22:50:48,095 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:50:48,162 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:50:48,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-23 22:50:48,215 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-23 22:50:48,216 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:50:48,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-23 22:50:48,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-23 22:50:48,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 158 flow [2023-08-23 22:50:48,228 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:50:48,234 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-23 22:50:48,236 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-23 22:50:48,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 158 flow [2023-08-23 22:50:48,250 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-23 22:50:48,250 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:50:48,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-23 22:50:48,252 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-08-23 22:50:49,820 INFO L134 LiptonReduction]: Checked pairs total: 3426 [2023-08-23 22:50:49,820 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-23 22:50:49,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:50:49,834 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;@4a6c4131, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:50:49,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-23 22:50:49,838 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:50:49,838 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-23 22:50:49,838 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:50:49,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:49,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:50:49,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 22:50:49,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash 460053008, now seen corresponding path program 1 times [2023-08-23 22:50:49,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:49,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859339347] [2023-08-23 22:50:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:49,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:50:49,994 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 22:50:49,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:50:49,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859339347] [2023-08-23 22:50:49,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859339347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:50:49,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:50:49,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:50:49,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064316883] [2023-08-23 22:50:49,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:50:50,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:50:50,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:50:50,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:50:50,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:50:50,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 135 [2023-08-23 22:50:50,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 22:50:50,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:50:50,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 135 [2023-08-23 22:50:50,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:50:50,094 INFO L124 PetriNetUnfolderBase]: 232/398 cut-off events. [2023-08-23 22:50:50,094 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:50:50,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 398 events. 232/398 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1416 event pairs, 66 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 799. Up to 278 conditions per place. [2023-08-23 22:50:50,098 INFO L140 encePairwiseOnDemand]: 129/135 looper letters, 22 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-23 22:50:50,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 108 flow [2023-08-23 22:50:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:50:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:50:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-08-23 22:50:50,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454320987654321 [2023-08-23 22:50:50,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-08-23 22:50:50,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-08-23 22:50:50,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:50:50,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-08-23 22:50:50,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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 22:50:50,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 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 22:50:50,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 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 22:50:50,117 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 56 flow. Second operand 3 states and 184 transitions. [2023-08-23 22:50:50,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 108 flow [2023-08-23 22:50:50,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:50:50,120 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 57 flow [2023-08-23 22:50:50,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-08-23 22:50:50,124 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-23 22:50:50,124 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 57 flow [2023-08-23 22:50:50,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 22:50:50,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:50,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-23 22:50:50,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:50:50,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 22:50:50,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:50,125 INFO L85 PathProgramCache]: Analyzing trace with hash 906397124, now seen corresponding path program 1 times [2023-08-23 22:50:50,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:50,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326813253] [2023-08-23 22:50:50,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:50,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:50:50,150 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:50:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:50:50,184 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:50:50,184 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:50:50,185 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-23 22:50:50,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-23 22:50:50,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-23 22:50:50,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-23 22:50:50,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:50:50,187 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 22:50:50,189 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:50:50,189 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 22:50:50,215 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:50:50,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 118 transitions, 260 flow [2023-08-23 22:50:50,231 INFO L124 PetriNetUnfolderBase]: 8/125 cut-off events. [2023-08-23 22:50:50,231 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:50:50,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 233 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2023-08-23 22:50:50,234 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 118 transitions, 260 flow [2023-08-23 22:50:50,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 103 transitions, 221 flow [2023-08-23 22:50:50,235 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:50:50,235 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 103 transitions, 221 flow [2023-08-23 22:50:50,235 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 103 transitions, 221 flow [2023-08-23 22:50:50,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 103 transitions, 221 flow [2023-08-23 22:50:50,251 INFO L124 PetriNetUnfolderBase]: 8/125 cut-off events. [2023-08-23 22:50:50,251 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:50:50,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 235 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-08-23 22:50:50,255 INFO L119 LiptonReduction]: Number of co-enabled transitions 4762 [2023-08-23 22:50:51,860 INFO L134 LiptonReduction]: Checked pairs total: 14107 [2023-08-23 22:50:51,860 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-08-23 22:50:51,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:50:51,862 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;@4a6c4131, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:50:51,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-23 22:50:51,863 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:50:51,864 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-23 22:50:51,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:50:51,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:51,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:50:51,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-23 22:50:51,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:51,864 INFO L85 PathProgramCache]: Analyzing trace with hash 681007459, now seen corresponding path program 1 times [2023-08-23 22:50:51,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:51,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149437685] [2023-08-23 22:50:51,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:51,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:50:51,913 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 22:50:51,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:50:51,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149437685] [2023-08-23 22:50:51,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149437685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:50:51,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:50:51,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:50:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695170602] [2023-08-23 22:50:51,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:50:51,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:50:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:50:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:50:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:50:51,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 190 [2023-08-23 22:50:51,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 22:50:51,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:50:51,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 190 [2023-08-23 22:50:51,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:50:52,360 INFO L124 PetriNetUnfolderBase]: 4526/6451 cut-off events. [2023-08-23 22:50:52,361 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2023-08-23 22:50:52,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13094 conditions, 6451 events. 4526/6451 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 34868 event pairs, 1323 based on Foata normal form. 0/5798 useless extension candidates. Maximal degree in co-relation 13083. Up to 5903 conditions per place. [2023-08-23 22:50:52,389 INFO L140 encePairwiseOnDemand]: 184/190 looper letters, 46 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-23 22:50:52,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 224 flow [2023-08-23 22:50:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:50:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:50:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-23 22:50:52,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46842105263157896 [2023-08-23 22:50:52,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-23 22:50:52,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-23 22:50:52,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:50:52,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-23 22:50:52,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 22:50:52,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 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 22:50:52,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 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 22:50:52,399 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 99 flow. Second operand 3 states and 267 transitions. [2023-08-23 22:50:52,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 224 flow [2023-08-23 22:50:52,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 221 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-23 22:50:52,400 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 111 flow [2023-08-23 22:50:52,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-23 22:50:52,401 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-08-23 22:50:52,401 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 111 flow [2023-08-23 22:50:52,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 22:50:52,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:52,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:50:52,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:50:52,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-23 22:50:52,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:52,402 INFO L85 PathProgramCache]: Analyzing trace with hash -226819370, now seen corresponding path program 1 times [2023-08-23 22:50:52,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:52,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695679344] [2023-08-23 22:50:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:52,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:50:52,471 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 22:50:52,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:50:52,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695679344] [2023-08-23 22:50:52,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695679344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:50:52,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:50:52,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:50:52,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927213231] [2023-08-23 22:50:52,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:50:52,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:50:52,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:50:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:50:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:50:52,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 190 [2023-08-23 22:50:52,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 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 22:50:52,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:50:52,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 190 [2023-08-23 22:50:52,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:50:53,048 INFO L124 PetriNetUnfolderBase]: 5404/7701 cut-off events. [2023-08-23 22:50:53,048 INFO L125 PetriNetUnfolderBase]: For 806/806 co-relation queries the response was YES. [2023-08-23 22:50:53,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16386 conditions, 7701 events. 5404/7701 cut-off events. For 806/806 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43861 event pairs, 1265 based on Foata normal form. 56/7456 useless extension candidates. Maximal degree in co-relation 16373. Up to 5835 conditions per place. [2023-08-23 22:50:53,095 INFO L140 encePairwiseOnDemand]: 180/190 looper letters, 95 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2023-08-23 22:50:53,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 116 transitions, 514 flow [2023-08-23 22:50:53,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-23 22:50:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-23 22:50:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 597 transitions. [2023-08-23 22:50:53,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488721804511278 [2023-08-23 22:50:53,097 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 597 transitions. [2023-08-23 22:50:53,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 597 transitions. [2023-08-23 22:50:53,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:50:53,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 597 transitions. [2023-08-23 22:50:53,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.28571428571429) internal successors, (597), 7 states have internal predecessors, (597), 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 22:50:53,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 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 22:50:53,101 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 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 22:50:53,101 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 111 flow. Second operand 7 states and 597 transitions. [2023-08-23 22:50:53,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 116 transitions, 514 flow [2023-08-23 22:50:53,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 116 transitions, 510 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:50:53,104 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 227 flow [2023-08-23 22:50:53,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-08-23 22:50:53,104 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2023-08-23 22:50:53,105 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 227 flow [2023-08-23 22:50:53,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 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 22:50:53,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:53,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:50:53,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:50:53,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-23 22:50:53,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1069921046, now seen corresponding path program 1 times [2023-08-23 22:50:53,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:53,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577953084] [2023-08-23 22:50:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:53,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:50:53,171 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 22:50:53,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:50:53,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577953084] [2023-08-23 22:50:53,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577953084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:50:53,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:50:53,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-23 22:50:53,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752152611] [2023-08-23 22:50:53,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:50:53,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-23 22:50:53,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:50:53,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-23 22:50:53,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-23 22:50:53,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 190 [2023-08-23 22:50:53,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 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 22:50:53,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:50:53,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 190 [2023-08-23 22:50:53,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:50:53,890 INFO L124 PetriNetUnfolderBase]: 6440/9205 cut-off events. [2023-08-23 22:50:53,890 INFO L125 PetriNetUnfolderBase]: For 4502/4502 co-relation queries the response was YES. [2023-08-23 22:50:53,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23027 conditions, 9205 events. 6440/9205 cut-off events. For 4502/4502 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 54805 event pairs, 883 based on Foata normal form. 112/9024 useless extension candidates. Maximal degree in co-relation 23009. Up to 5369 conditions per place. [2023-08-23 22:50:53,939 INFO L140 encePairwiseOnDemand]: 179/190 looper letters, 126 selfloop transitions, 23 changer transitions 0/153 dead transitions. [2023-08-23 22:50:53,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 153 transitions, 798 flow [2023-08-23 22:50:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-23 22:50:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-23 22:50:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 762 transitions. [2023-08-23 22:50:53,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456140350877193 [2023-08-23 22:50:53,942 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 762 transitions. [2023-08-23 22:50:53,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 762 transitions. [2023-08-23 22:50:53,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:50:53,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 762 transitions. [2023-08-23 22:50:53,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.66666666666667) internal successors, (762), 9 states have internal predecessors, (762), 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 22:50:53,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 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 22:50:53,946 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 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 22:50:53,946 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 227 flow. Second operand 9 states and 762 transitions. [2023-08-23 22:50:53,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 153 transitions, 798 flow [2023-08-23 22:50:53,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 153 transitions, 790 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-23 22:50:53,959 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 321 flow [2023-08-23 22:50:53,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-08-23 22:50:53,959 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2023-08-23 22:50:53,959 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 321 flow [2023-08-23 22:50:53,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 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 22:50:53,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:53,960 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-23 22:50:53,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:50:53,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-23 22:50:53,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:53,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1848916684, now seen corresponding path program 1 times [2023-08-23 22:50:53,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:53,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683697275] [2023-08-23 22:50:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:53,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:50:53,970 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:50:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:50:53,977 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:50:53,977 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:50:53,977 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-23 22:50:53,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-23 22:50:53,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-23 22:50:53,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-23 22:50:53,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-23 22:50:53,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 22:50:53,978 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-23 22:50:53,978 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:50:53,978 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-23 22:50:54,025 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:50:54,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 160 transitions, 362 flow [2023-08-23 22:50:54,072 INFO L124 PetriNetUnfolderBase]: 10/165 cut-off events. [2023-08-23 22:50:54,072 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:50:54,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 165 events. 10/165 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 389 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 179. Up to 8 conditions per place. [2023-08-23 22:50:54,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 160 transitions, 362 flow [2023-08-23 22:50:54,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 131 transitions, 286 flow [2023-08-23 22:50:54,074 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:50:54,074 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 131 transitions, 286 flow [2023-08-23 22:50:54,074 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 131 transitions, 286 flow [2023-08-23 22:50:54,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 286 flow [2023-08-23 22:50:54,088 INFO L124 PetriNetUnfolderBase]: 10/165 cut-off events. [2023-08-23 22:50:54,088 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:50:54,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 165 events. 10/165 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 391 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-23 22:50:54,092 INFO L119 LiptonReduction]: Number of co-enabled transitions 9216 [2023-08-23 22:50:56,042 INFO L134 LiptonReduction]: Checked pairs total: 26169 [2023-08-23 22:50:56,043 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-23 22:50:56,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:50:56,044 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;@4a6c4131, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:50:56,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-23 22:50:56,046 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:50:56,046 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-23 22:50:56,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:50:56,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:56,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:50:56,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:50:56,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:56,046 INFO L85 PathProgramCache]: Analyzing trace with hash 957231032, now seen corresponding path program 1 times [2023-08-23 22:50:56,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:56,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304371079] [2023-08-23 22:50:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:56,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:50:56,062 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 22:50:56,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:50:56,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304371079] [2023-08-23 22:50:56,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304371079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:50:56,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:50:56,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:50:56,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371952328] [2023-08-23 22:50:56,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:50:56,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:50:56,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:50:56,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:50:56,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:50:56,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 248 [2023-08-23 22:50:56,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 22:50:56,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:50:56,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 248 [2023-08-23 22:50:56,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:51:02,507 INFO L124 PetriNetUnfolderBase]: 82862/107175 cut-off events. [2023-08-23 22:51:02,507 INFO L125 PetriNetUnfolderBase]: For 5524/5524 co-relation queries the response was YES. [2023-08-23 22:51:02,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217983 conditions, 107175 events. 82862/107175 cut-off events. For 5524/5524 co-relation queries the response was YES. Maximal size of possible extension queue 2968. Compared 636885 event pairs, 29321 based on Foata normal form. 0/96864 useless extension candidates. Maximal degree in co-relation 217971. Up to 104467 conditions per place. [2023-08-23 22:51:02,940 INFO L140 encePairwiseOnDemand]: 241/248 looper letters, 64 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2023-08-23 22:51:02,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 316 flow [2023-08-23 22:51:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:51:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:51:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-08-23 22:51:02,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650537634408602 [2023-08-23 22:51:02,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-08-23 22:51:02,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-08-23 22:51:02,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:51:02,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-08-23 22:51:02,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 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 22:51:02,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 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 22:51:02,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 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 22:51:02,944 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 136 flow. Second operand 3 states and 346 transitions. [2023-08-23 22:51:02,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 316 flow [2023-08-23 22:51:02,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 307 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-23 22:51:02,948 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 151 flow [2023-08-23 22:51:02,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-23 22:51:02,949 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2023-08-23 22:51:02,949 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 151 flow [2023-08-23 22:51:02,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 22:51:02,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:51:02,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:51:02,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-23 22:51:02,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:51:02,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:51:02,950 INFO L85 PathProgramCache]: Analyzing trace with hash 596529296, now seen corresponding path program 1 times [2023-08-23 22:51:02,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:51:02,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190892777] [2023-08-23 22:51:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:51:02,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:51:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:51:02,998 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 22:51:02,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:51:02,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190892777] [2023-08-23 22:51:02,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190892777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:51:03,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:51:03,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:51:03,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302433944] [2023-08-23 22:51:03,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:51:03,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:51:03,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:51:03,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:51:03,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:51:03,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 248 [2023-08-23 22:51:03,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 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 22:51:03,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:51:03,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 248 [2023-08-23 22:51:03,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:51:11,066 INFO L124 PetriNetUnfolderBase]: 105304/136309 cut-off events. [2023-08-23 22:51:11,067 INFO L125 PetriNetUnfolderBase]: For 15164/15164 co-relation queries the response was YES. [2023-08-23 22:51:11,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289569 conditions, 136309 events. 105304/136309 cut-off events. For 15164/15164 co-relation queries the response was YES. Maximal size of possible extension queue 4049. Compared 843724 event pairs, 30707 based on Foata normal form. 732/130684 useless extension candidates. Maximal degree in co-relation 289555. Up to 107547 conditions per place. [2023-08-23 22:51:11,867 INFO L140 encePairwiseOnDemand]: 234/248 looper letters, 155 selfloop transitions, 27 changer transitions 0/186 dead transitions. [2023-08-23 22:51:11,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 186 transitions, 840 flow [2023-08-23 22:51:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-23 22:51:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-23 22:51:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 807 transitions. [2023-08-23 22:51:11,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46486175115207373 [2023-08-23 22:51:11,871 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 807 transitions. [2023-08-23 22:51:11,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 807 transitions. [2023-08-23 22:51:11,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:51:11,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 807 transitions. [2023-08-23 22:51:11,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.28571428571429) internal successors, (807), 7 states have internal predecessors, (807), 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 22:51:11,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 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 22:51:11,874 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 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 22:51:11,874 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 151 flow. Second operand 7 states and 807 transitions. [2023-08-23 22:51:11,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 186 transitions, 840 flow [2023-08-23 22:51:11,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 186 transitions, 834 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:51:11,891 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 342 flow [2023-08-23 22:51:11,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2023-08-23 22:51:11,895 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2023-08-23 22:51:11,895 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 342 flow [2023-08-23 22:51:11,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 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 22:51:11,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:51:11,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:51:11,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 22:51:11,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:51:11,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:51:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2034031899, now seen corresponding path program 1 times [2023-08-23 22:51:11,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:51:11,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061465944] [2023-08-23 22:51:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:51:11,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:51:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:51:11,958 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 22:51:11,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:51:11,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061465944] [2023-08-23 22:51:11,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061465944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:51:11,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:51:11,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:51:11,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93489189] [2023-08-23 22:51:11,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:51:11,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 22:51:11,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:51:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 22:51:11,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-23 22:51:11,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 248 [2023-08-23 22:51:11,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 90.0) internal successors, (540), 6 states have internal predecessors, (540), 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 22:51:11,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:51:11,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 248 [2023-08-23 22:51:11,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:51:23,785 INFO L124 PetriNetUnfolderBase]: 138528/180009 cut-off events. [2023-08-23 22:51:23,785 INFO L125 PetriNetUnfolderBase]: For 99410/99410 co-relation queries the response was YES. [2023-08-23 22:51:24,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461818 conditions, 180009 events. 138528/180009 cut-off events. For 99410/99410 co-relation queries the response was YES. Maximal size of possible extension queue 5540. Compared 1167664 event pairs, 35899 based on Foata normal form. 1464/173652 useless extension candidates. Maximal degree in co-relation 461799. Up to 108879 conditions per place. [2023-08-23 22:51:24,818 INFO L140 encePairwiseOnDemand]: 232/248 looper letters, 225 selfloop transitions, 47 changer transitions 0/276 dead transitions. [2023-08-23 22:51:24,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 276 transitions, 1496 flow [2023-08-23 22:51:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-23 22:51:24,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-23 22:51:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1064 transitions. [2023-08-23 22:51:24,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767025089605735 [2023-08-23 22:51:24,821 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1064 transitions. [2023-08-23 22:51:24,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1064 transitions. [2023-08-23 22:51:24,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:51:24,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1064 transitions. [2023-08-23 22:51:24,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 118.22222222222223) internal successors, (1064), 9 states have internal predecessors, (1064), 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 22:51:24,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 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 22:51:24,826 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 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 22:51:24,826 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 342 flow. Second operand 9 states and 1064 transitions. [2023-08-23 22:51:24,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 276 transitions, 1496 flow [2023-08-23 22:51:25,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 276 transitions, 1482 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-23 22:51:25,059 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 621 flow [2023-08-23 22:51:25,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=621, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2023-08-23 22:51:25,059 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2023-08-23 22:51:25,059 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 621 flow [2023-08-23 22:51:25,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.0) internal successors, (540), 6 states have internal predecessors, (540), 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 22:51:25,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:51:25,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:51:25,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-23 22:51:25,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:51:25,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:51:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash 326842020, now seen corresponding path program 1 times [2023-08-23 22:51:25,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:51:25,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909194798] [2023-08-23 22:51:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:51:25,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:51:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:51:25,097 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 22:51:25,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:51:25,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909194798] [2023-08-23 22:51:25,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909194798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:51:25,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:51:25,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:51:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971199710] [2023-08-23 22:51:25,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:51:25,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:51:25,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:51:25,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:51:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:51:25,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 248 [2023-08-23 22:51:25,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 621 flow. Second operand has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 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 22:51:25,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:51:25,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 248 [2023-08-23 22:51:25,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:51:40,508 INFO L124 PetriNetUnfolderBase]: 160652/208485 cut-off events. [2023-08-23 22:51:40,509 INFO L125 PetriNetUnfolderBase]: For 323498/323498 co-relation queries the response was YES. [2023-08-23 22:51:41,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641646 conditions, 208485 events. 160652/208485 cut-off events. For 323498/323498 co-relation queries the response was YES. Maximal size of possible extension queue 6696. Compared 1379404 event pairs, 41963 based on Foata normal form. 920/201354 useless extension candidates. Maximal degree in co-relation 641623. Up to 180157 conditions per place. [2023-08-23 22:51:41,797 INFO L140 encePairwiseOnDemand]: 235/248 looper letters, 196 selfloop transitions, 26 changer transitions 0/226 dead transitions. [2023-08-23 22:51:41,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 226 transitions, 1701 flow [2023-08-23 22:51:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:51:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:51:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 682 transitions. [2023-08-23 22:51:41,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-23 22:51:41,799 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 682 transitions. [2023-08-23 22:51:41,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 682 transitions. [2023-08-23 22:51:41,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:51:41,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 682 transitions. [2023-08-23 22:51:41,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 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 22:51:41,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 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 22:51:41,803 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 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 22:51:41,803 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 621 flow. Second operand 6 states and 682 transitions. [2023-08-23 22:51:41,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 226 transitions, 1701 flow [2023-08-23 22:51:43,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 226 transitions, 1523 flow, removed 56 selfloop flow, removed 4 redundant places. [2023-08-23 22:51:43,044 INFO L231 Difference]: Finished difference. Result has 85 places, 120 transitions, 782 flow [2023-08-23 22:51:43,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=782, PETRI_PLACES=85, PETRI_TRANSITIONS=120} [2023-08-23 22:51:43,045 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 23 predicate places. [2023-08-23 22:51:43,045 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 120 transitions, 782 flow [2023-08-23 22:51:43,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 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 22:51:43,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:51:43,046 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:51:43,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-23 22:51:43,046 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:51:43,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:51:43,046 INFO L85 PathProgramCache]: Analyzing trace with hash 562489667, now seen corresponding path program 1 times [2023-08-23 22:51:43,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:51:43,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285854493] [2023-08-23 22:51:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:51:43,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:51:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:51:43,090 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 22:51:43,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:51:43,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285854493] [2023-08-23 22:51:43,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285854493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:51:43,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:51:43,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:51:43,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026001275] [2023-08-23 22:51:43,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:51:43,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 22:51:43,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:51:43,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 22:51:43,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-23 22:51:43,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 248 [2023-08-23 22:51:43,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 120 transitions, 782 flow. Second operand has 6 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 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 22:51:43,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:51:43,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 248 [2023-08-23 22:51:43,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:52:04,087 INFO L124 PetriNetUnfolderBase]: 207840/270219 cut-off events. [2023-08-23 22:52:04,087 INFO L125 PetriNetUnfolderBase]: For 550604/550604 co-relation queries the response was YES. [2023-08-23 22:52:04,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865377 conditions, 270219 events. 207840/270219 cut-off events. For 550604/550604 co-relation queries the response was YES. Maximal size of possible extension queue 8989. Compared 1849249 event pairs, 51829 based on Foata normal form. 1904/262543 useless extension candidates. Maximal degree in co-relation 865349. Up to 182521 conditions per place. [2023-08-23 22:52:06,239 INFO L140 encePairwiseOnDemand]: 232/248 looper letters, 318 selfloop transitions, 65 changer transitions 0/387 dead transitions. [2023-08-23 22:52:06,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 387 transitions, 2817 flow [2023-08-23 22:52:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-23 22:52:06,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-23 22:52:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1059 transitions. [2023-08-23 22:52:06,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47446236559139787 [2023-08-23 22:52:06,243 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1059 transitions. [2023-08-23 22:52:06,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1059 transitions. [2023-08-23 22:52:06,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:52:06,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1059 transitions. [2023-08-23 22:52:06,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 117.66666666666667) internal successors, (1059), 9 states have internal predecessors, (1059), 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 22:52:06,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 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 22:52:06,262 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 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 22:52:06,262 INFO L175 Difference]: Start difference. First operand has 85 places, 120 transitions, 782 flow. Second operand 9 states and 1059 transitions. [2023-08-23 22:52:06,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 387 transitions, 2817 flow [2023-08-23 22:52:08,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 387 transitions, 2696 flow, removed 48 selfloop flow, removed 1 redundant places. [2023-08-23 22:52:08,471 INFO L231 Difference]: Finished difference. Result has 96 places, 159 transitions, 1279 flow [2023-08-23 22:52:08,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1279, PETRI_PLACES=96, PETRI_TRANSITIONS=159} [2023-08-23 22:52:08,472 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 34 predicate places. [2023-08-23 22:52:08,472 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 159 transitions, 1279 flow [2023-08-23 22:52:08,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 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 22:52:08,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:52:08,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:52:08,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-23 22:52:08,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:52:08,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:52:08,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1481009839, now seen corresponding path program 1 times [2023-08-23 22:52:08,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:52:08,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375026380] [2023-08-23 22:52:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:52:08,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:52:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:52:08,530 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 22:52:08,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:52:08,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375026380] [2023-08-23 22:52:08,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375026380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:52:08,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:52:08,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-23 22:52:08,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083854364] [2023-08-23 22:52:08,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:52:08,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-23 22:52:08,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:52:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-23 22:52:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-23 22:52:08,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 248 [2023-08-23 22:52:08,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 159 transitions, 1279 flow. Second operand has 8 states, 8 states have (on average 89.0) internal successors, (712), 8 states have internal predecessors, (712), 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 22:52:08,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:52:08,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 248 [2023-08-23 22:52:08,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:52:49,156 INFO L124 PetriNetUnfolderBase]: 342038/444067 cut-off events. [2023-08-23 22:52:49,156 INFO L125 PetriNetUnfolderBase]: For 1780230/1780230 co-relation queries the response was YES. [2023-08-23 22:52:50,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1566340 conditions, 444067 events. 342038/444067 cut-off events. For 1780230/1780230 co-relation queries the response was YES. Maximal size of possible extension queue 14423. Compared 3191210 event pairs, 42653 based on Foata normal form. 7720/436964 useless extension candidates. Maximal degree in co-relation 1566307. Up to 187991 conditions per place. [2023-08-23 22:52:52,965 INFO L140 encePairwiseOnDemand]: 228/248 looper letters, 510 selfloop transitions, 232 changer transitions 0/746 dead transitions. [2023-08-23 22:52:52,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 746 transitions, 6728 flow [2023-08-23 22:52:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-23 22:52:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-23 22:52:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1790 transitions. [2023-08-23 22:52:52,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48118279569892475 [2023-08-23 22:52:52,969 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1790 transitions. [2023-08-23 22:52:52,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1790 transitions. [2023-08-23 22:52:52,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:52:52,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1790 transitions. [2023-08-23 22:52:52,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 119.33333333333333) internal successors, (1790), 15 states have internal predecessors, (1790), 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 22:52:52,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 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 22:52:52,975 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 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 22:52:52,976 INFO L175 Difference]: Start difference. First operand has 96 places, 159 transitions, 1279 flow. Second operand 15 states and 1790 transitions. [2023-08-23 22:52:52,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 746 transitions, 6728 flow [2023-08-23 22:53:08,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 746 transitions, 5862 flow, removed 364 selfloop flow, removed 3 redundant places. [2023-08-23 22:53:08,914 INFO L231 Difference]: Finished difference. Result has 116 places, 325 transitions, 3715 flow [2023-08-23 22:53:08,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3715, PETRI_PLACES=116, PETRI_TRANSITIONS=325} [2023-08-23 22:53:08,915 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 54 predicate places. [2023-08-23 22:53:08,916 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 325 transitions, 3715 flow [2023-08-23 22:53:08,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.0) internal successors, (712), 8 states have internal predecessors, (712), 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 22:53:08,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:08,916 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:08,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-23 22:53:08,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:53:08,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:08,917 INFO L85 PathProgramCache]: Analyzing trace with hash 456391473, now seen corresponding path program 1 times [2023-08-23 22:53:08,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:08,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400101010] [2023-08-23 22:53:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:08,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:08,935 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:53:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:08,950 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:53:08,951 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:53:08,951 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-23 22:53:08,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-23 22:53:08,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-23 22:53:08,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-23 22:53:08,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-23 22:53:08,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-23 22:53:08,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-23 22:53:08,952 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:08,952 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:53:08,952 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-23 22:53:08,991 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:53:08,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 202 transitions, 468 flow [2023-08-23 22:53:09,005 INFO L124 PetriNetUnfolderBase]: 12/205 cut-off events. [2023-08-23 22:53:09,005 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:53:09,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 205 events. 12/205 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 571 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 225. Up to 10 conditions per place. [2023-08-23 22:53:09,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 202 transitions, 468 flow [2023-08-23 22:53:09,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 159 transitions, 353 flow [2023-08-23 22:53:09,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:53:09,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 159 transitions, 353 flow [2023-08-23 22:53:09,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 159 transitions, 353 flow [2023-08-23 22:53:09,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 159 transitions, 353 flow [2023-08-23 22:53:09,018 INFO L124 PetriNetUnfolderBase]: 12/205 cut-off events. [2023-08-23 22:53:09,018 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:53:09,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 205 events. 12/205 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 569 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 204. Up to 10 conditions per place. [2023-08-23 22:53:09,025 INFO L119 LiptonReduction]: Number of co-enabled transitions 15182 [2023-08-23 22:53:11,582 INFO L134 LiptonReduction]: Checked pairs total: 52357 [2023-08-23 22:53:11,583 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-23 22:53:11,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:53:11,584 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;@4a6c4131, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:53:11,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-23 22:53:11,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:53:11,585 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-23 22:53:11,585 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:53:11,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:11,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:53:11,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:53:11,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1290665048, now seen corresponding path program 1 times [2023-08-23 22:53:11,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:11,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213547510] [2023-08-23 22:53:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:11,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:11,599 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 22:53:11,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:11,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213547510] [2023-08-23 22:53:11,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213547510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:11,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:11,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:53:11,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944956751] [2023-08-23 22:53:11,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:11,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:11,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:11,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:11,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 308 [2023-08-23 22:53:11,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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 22:53:11,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:11,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 308 [2023-08-23 22:53:11,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand