/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/goblint-regression/28-race_reach_77-tricky_address4_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:12:01,708 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:12:01,775 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 00:12:01,780 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:12:01,780 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:12:01,800 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:12:01,801 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:12:01,801 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:12:01,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:12:01,804 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:12:01,804 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:12:01,804 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:12:01,804 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:12:01,805 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:12:01,805 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:12:01,806 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:12:01,806 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:12:01,806 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:12:01,806 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:12:01,806 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:12:01,806 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:12:01,807 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:12:01,807 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:12:01,807 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:12:01,808 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:12:01,808 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:12:01,808 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:12:01,808 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:12:01,808 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:12:01,808 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:12:01,809 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:12:01,809 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:12:01,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:12:01,809 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:12:01,809 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:12:01,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:12:02,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:12:02,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:12:02,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:12:02,071 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:12:02,072 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:12:02,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-24 00:12:02,988 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:12:03,210 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:12:03,211 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-24 00:12:03,223 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/147100b64/acc66195167545f2bde215325c069794/FLAG790534c6c [2023-08-24 00:12:03,235 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/147100b64/acc66195167545f2bde215325c069794 [2023-08-24 00:12:03,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:12:03,239 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:12:03,241 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:12:03,241 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:12:03,243 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:12:03,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,244 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@276eb117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03, skipping insertion in model container [2023-08-24 00:12:03,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,286 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:12:03,591 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-08-24 00:12:03,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:12:03,622 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:12:03,646 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:12:03,648 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:12:03,658 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-24 00:12:03,662 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-08-24 00:12:03,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:12:03,713 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:12:03,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03 WrapperNode [2023-08-24 00:12:03,713 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:12:03,714 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:12:03,714 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:12:03,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:12:03,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,730 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,752 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 196 [2023-08-24 00:12:03,752 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:12:03,753 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:12:03,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:12:03,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:12:03,758 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,761 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,761 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,769 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,770 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,771 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,773 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:12:03,774 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:12:03,774 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:12:03,774 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:12:03,774 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (1/1) ... [2023-08-24 00:12:03,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:12:03,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:03,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 00:12:03,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 00:12:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:12:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:12:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:12:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:12:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:12:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:12:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 00:12:03,840 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 00:12:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:12:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:12:03,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:12:03,841 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 00:12:03,938 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:12:03,939 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:12:04,102 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:12:04,107 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:12:04,107 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-24 00:12:04,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:12:04 BoogieIcfgContainer [2023-08-24 00:12:04,109 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:12:04,110 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:12:04,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:12:04,112 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:12:04,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:12:03" (1/3) ... [2023-08-24 00:12:04,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a049bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:12:04, skipping insertion in model container [2023-08-24 00:12:04,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:03" (2/3) ... [2023-08-24 00:12:04,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a049bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:12:04, skipping insertion in model container [2023-08-24 00:12:04,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:12:04" (3/3) ... [2023-08-24 00:12:04,114 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-08-24 00:12:04,125 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:12:04,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 00:12:04,126 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:12:04,175 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 00:12:04,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 400 flow [2023-08-24 00:12:04,252 INFO L124 PetriNetUnfolderBase]: 45/268 cut-off events. [2023-08-24 00:12:04,252 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-24 00:12:04,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 268 events. 45/268 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 837 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-08-24 00:12:04,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 196 transitions, 400 flow [2023-08-24 00:12:04,260 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 191 transitions, 387 flow [2023-08-24 00:12:04,262 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:12:04,268 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 191 transitions, 387 flow [2023-08-24 00:12:04,269 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 191 transitions, 387 flow [2023-08-24 00:12:04,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 191 transitions, 387 flow [2023-08-24 00:12:04,307 INFO L124 PetriNetUnfolderBase]: 44/263 cut-off events. [2023-08-24 00:12:04,307 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:12:04,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 263 events. 44/263 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 800 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-08-24 00:12:04,313 INFO L119 LiptonReduction]: Number of co-enabled transitions 11076 [2023-08-24 00:12:06,499 INFO L134 LiptonReduction]: Checked pairs total: 18087 [2023-08-24 00:12:06,500 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-24 00:12:06,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:12:06,524 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;@4988b293, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:12:06,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 00:12:06,530 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:12:06,530 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2023-08-24 00:12:06,530 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:12:06,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:06,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:12:06,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:12:06,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1630590956, now seen corresponding path program 1 times [2023-08-24 00:12:06,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:06,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198531970] [2023-08-24 00:12:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:06,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:06,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:06,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198531970] [2023-08-24 00:12:06,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198531970] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:12:06,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:12:06,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:12:06,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435806636] [2023-08-24 00:12:06,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:12:06,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:12:06,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:06,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:12:06,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:12:06,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 00:12:06,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:06,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:06,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 00:12:06,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:06,904 INFO L124 PetriNetUnfolderBase]: 272/611 cut-off events. [2023-08-24 00:12:06,904 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:12:06,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 611 events. 272/611 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3026 event pairs, 238 based on Foata normal form. 118/638 useless extension candidates. Maximal degree in co-relation 1092. Up to 528 conditions per place. [2023-08-24 00:12:06,910 INFO L140 encePairwiseOnDemand]: 339/364 looper letters, 34 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-24 00:12:06,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-08-24 00:12:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:12:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:12:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2023-08-24 00:12:06,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48534798534798534 [2023-08-24 00:12:06,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2023-08-24 00:12:06,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2023-08-24 00:12:06,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:06,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2023-08-24 00:12:06,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:06,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:06,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:06,938 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 530 transitions. [2023-08-24 00:12:06,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-08-24 00:12:06,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:12:06,943 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 105 flow [2023-08-24 00:12:06,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-24 00:12:06,947 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-24 00:12:06,947 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 105 flow [2023-08-24 00:12:06,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:06,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:06,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:12:06,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:12:06,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:12:06,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1557690004, now seen corresponding path program 1 times [2023-08-24 00:12:06,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:06,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893917455] [2023-08-24 00:12:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:06,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:07,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:07,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893917455] [2023-08-24 00:12:07,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893917455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:12:07,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568849181] [2023-08-24 00:12:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:07,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:07,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:07,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:12:07,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 00:12:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:07,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-24 00:12:07,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:12:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:12:07,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:12:07,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568849181] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:12:07,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:12:07,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 00:12:07,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061721449] [2023-08-24 00:12:07,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:12:07,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:12:07,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:12:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:12:07,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 00:12:07,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:07,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:07,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 00:12:07,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:07,231 INFO L124 PetriNetUnfolderBase]: 255/592 cut-off events. [2023-08-24 00:12:07,231 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:12:07,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 592 events. 255/592 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3329 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 1120. Up to 497 conditions per place. [2023-08-24 00:12:07,234 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 49 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-24 00:12:07,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 237 flow [2023-08-24 00:12:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:12:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:12:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-24 00:12:07,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2023-08-24 00:12:07,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-24 00:12:07,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-24 00:12:07,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:07,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-24 00:12:07,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:07,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:07,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:07,262 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 105 flow. Second operand 3 states and 522 transitions. [2023-08-24 00:12:07,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 237 flow [2023-08-24 00:12:07,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 233 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:12:07,268 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 109 flow [2023-08-24 00:12:07,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-24 00:12:07,268 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-08-24 00:12:07,268 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 109 flow [2023-08-24 00:12:07,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:07,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:07,269 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-24 00:12:07,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 00:12:07,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:07,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:12:07,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1047843948, now seen corresponding path program 1 times [2023-08-24 00:12:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:07,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442999176] [2023-08-24 00:12:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:07,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:12:07,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:07,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442999176] [2023-08-24 00:12:07,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442999176] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:12:07,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76954203] [2023-08-24 00:12:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:07,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:07,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:07,532 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:12:07,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 00:12:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:07,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:12:07,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:12:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:12:07,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:12:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:12:07,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76954203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:12:07,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:12:07,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 00:12:07,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759996755] [2023-08-24 00:12:07,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:12:07,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:12:07,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:12:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 00:12:07,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 00:12:07,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 158.5) internal successors, (951), 6 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:07,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:07,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 00:12:07,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:07,777 INFO L124 PetriNetUnfolderBase]: 270/596 cut-off events. [2023-08-24 00:12:07,777 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-08-24 00:12:07,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 596 events. 270/596 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2934 event pairs, 238 based on Foata normal form. 3/527 useless extension candidates. Maximal degree in co-relation 1147. Up to 513 conditions per place. [2023-08-24 00:12:07,779 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 34 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-08-24 00:12:07,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 199 flow [2023-08-24 00:12:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:12:07,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:12:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 984 transitions. [2023-08-24 00:12:07,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2023-08-24 00:12:07,781 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 984 transitions. [2023-08-24 00:12:07,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 984 transitions. [2023-08-24 00:12:07,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:07,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 984 transitions. [2023-08-24 00:12:07,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:07,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 364.0) internal successors, (2548), 7 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:07,787 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 364.0) internal successors, (2548), 7 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:07,788 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 109 flow. Second operand 6 states and 984 transitions. [2023-08-24 00:12:07,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 199 flow [2023-08-24 00:12:07,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 00:12:07,790 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 141 flow [2023-08-24 00:12:07,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-24 00:12:07,791 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-08-24 00:12:07,791 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 141 flow [2023-08-24 00:12:07,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.5) internal successors, (951), 6 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:07,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:07,792 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-24 00:12:07,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 00:12:07,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-24 00:12:07,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:12:07,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:07,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1076409068, now seen corresponding path program 2 times [2023-08-24 00:12:07,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:07,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492496766] [2023-08-24 00:12:07,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:07,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:12:08,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:08,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492496766] [2023-08-24 00:12:08,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492496766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:12:08,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375174206] [2023-08-24 00:12:08,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:12:08,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:08,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:08,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:12:08,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 00:12:08,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:12:08,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:12:08,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:12:08,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:12:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:12:08,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:12:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:12:08,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375174206] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:12:08,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:12:08,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 00:12:08,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785900649] [2023-08-24 00:12:08,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:12:08,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:12:08,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:08,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:12:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 00:12:08,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 00:12:08,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 141 flow. Second operand has 13 states, 13 states have (on average 158.30769230769232) internal successors, (2058), 13 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:08,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:08,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 00:12:08,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:08,293 INFO L124 PetriNetUnfolderBase]: 271/605 cut-off events. [2023-08-24 00:12:08,293 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-08-24 00:12:08,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 605 events. 271/605 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2944 event pairs, 238 based on Foata normal form. 6/538 useless extension candidates. Maximal degree in co-relation 1140. Up to 513 conditions per place. [2023-08-24 00:12:08,295 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 34 selfloop transitions, 11 changer transitions 0/54 dead transitions. [2023-08-24 00:12:08,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 267 flow [2023-08-24 00:12:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:12:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:12:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1935 transitions. [2023-08-24 00:12:08,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429945054945055 [2023-08-24 00:12:08,299 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1935 transitions. [2023-08-24 00:12:08,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1935 transitions. [2023-08-24 00:12:08,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:08,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1935 transitions. [2023-08-24 00:12:08,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 161.25) internal successors, (1935), 12 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:08,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 364.0) internal successors, (4732), 13 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:08,308 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 364.0) internal successors, (4732), 13 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:08,308 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 141 flow. Second operand 12 states and 1935 transitions. [2023-08-24 00:12:08,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 267 flow [2023-08-24 00:12:08,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 253 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:12:08,310 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 211 flow [2023-08-24 00:12:08,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=211, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2023-08-24 00:12:08,311 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2023-08-24 00:12:08,311 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 211 flow [2023-08-24 00:12:08,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 158.30769230769232) internal successors, (2058), 13 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:08,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:08,312 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-24 00:12:08,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 00:12:08,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:08,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:12:08,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:08,517 INFO L85 PathProgramCache]: Analyzing trace with hash -749552364, now seen corresponding path program 3 times [2023-08-24 00:12:08,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:08,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609847764] [2023-08-24 00:12:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:08,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:12:08,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:12:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:12:08,556 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:12:08,556 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:12:08,557 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-24 00:12:08,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-24 00:12:08,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-24 00:12:08,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-24 00:12:08,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 00:12:08,558 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-24 00:12:08,560 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:12:08,560 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:12:08,579 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 00:12:08,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 00:12:08,609 INFO L124 PetriNetUnfolderBase]: 75/438 cut-off events. [2023-08-24 00:12:08,610 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 00:12:08,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1742 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 270. Up to 12 conditions per place. [2023-08-24 00:12:08,612 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 00:12:08,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 269 transitions, 556 flow [2023-08-24 00:12:08,615 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:12:08,615 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 269 transitions, 556 flow [2023-08-24 00:12:08,615 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 269 transitions, 556 flow [2023-08-24 00:12:08,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 00:12:08,648 INFO L124 PetriNetUnfolderBase]: 75/438 cut-off events. [2023-08-24 00:12:08,648 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 00:12:08,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1742 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 270. Up to 12 conditions per place. [2023-08-24 00:12:08,664 INFO L119 LiptonReduction]: Number of co-enabled transitions 33796 [2023-08-24 00:12:11,237 INFO L134 LiptonReduction]: Checked pairs total: 58541 [2023-08-24 00:12:11,238 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-08-24 00:12:11,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:12:11,239 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;@4988b293, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:12:11,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 00:12:11,242 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:12:11,242 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-08-24 00:12:11,242 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:12:11,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:11,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:12:11,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:12:11,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:11,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1273183684, now seen corresponding path program 1 times [2023-08-24 00:12:11,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:11,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046689820] [2023-08-24 00:12:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:11,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:11,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:11,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046689820] [2023-08-24 00:12:11,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046689820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:12:11,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:12:11,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:12:11,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442670906] [2023-08-24 00:12:11,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:12:11,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:12:11,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:11,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:12:11,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:12:11,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 00:12:11,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:11,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:11,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 00:12:11,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:12,165 INFO L124 PetriNetUnfolderBase]: 10521/16515 cut-off events. [2023-08-24 00:12:12,165 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-24 00:12:12,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32050 conditions, 16515 events. 10521/16515 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 109632 event pairs, 9818 based on Foata normal form. 2499/16448 useless extension candidates. Maximal degree in co-relation 13969. Up to 15431 conditions per place. [2023-08-24 00:12:12,218 INFO L140 encePairwiseOnDemand]: 461/495 looper letters, 56 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-24 00:12:12,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-08-24 00:12:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:12:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:12:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-08-24 00:12:12,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2023-08-24 00:12:12,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-08-24 00:12:12,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-08-24 00:12:12,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:12,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-08-24 00:12:12,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:12,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:12,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:12,224 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 735 transitions. [2023-08-24 00:12:12,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-08-24 00:12:12,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:12:12,226 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2023-08-24 00:12:12,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-08-24 00:12:12,227 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-24 00:12:12,227 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2023-08-24 00:12:12,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:12,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:12,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:12:12,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 00:12:12,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:12:12,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:12,228 INFO L85 PathProgramCache]: Analyzing trace with hash 133886316, now seen corresponding path program 1 times [2023-08-24 00:12:12,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:12,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197159731] [2023-08-24 00:12:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:12,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:12,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:12,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197159731] [2023-08-24 00:12:12,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197159731] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:12:12,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892408707] [2023-08-24 00:12:12,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:12,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:12,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:12,254 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:12:12,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 00:12:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:12,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-24 00:12:12,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:12:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:12:12,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:12:12,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892408707] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:12:12,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:12:12,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 00:12:12,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065899607] [2023-08-24 00:12:12,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:12:12,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:12:12,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:12,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:12:12,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:12:12,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 00:12:12,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:12,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:12,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 00:12:12,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:13,238 INFO L124 PetriNetUnfolderBase]: 10399/16491 cut-off events. [2023-08-24 00:12:13,238 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2023-08-24 00:12:13,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32041 conditions, 16491 events. 10399/16491 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 111677 event pairs, 4650 based on Foata normal form. 0/13963 useless extension candidates. Maximal degree in co-relation 32028. Up to 15399 conditions per place. [2023-08-24 00:12:13,293 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 74 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-24 00:12:13,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 356 flow [2023-08-24 00:12:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:12:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:12:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2023-08-24 00:12:13,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855218855218855 [2023-08-24 00:12:13,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2023-08-24 00:12:13,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2023-08-24 00:12:13,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:13,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2023-08-24 00:12:13,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:13,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:13,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:13,298 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 721 transitions. [2023-08-24 00:12:13,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 356 flow [2023-08-24 00:12:13,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 352 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:12:13,300 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2023-08-24 00:12:13,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-08-24 00:12:13,301 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-08-24 00:12:13,301 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2023-08-24 00:12:13,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:13,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:13,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:12:13,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 00:12:13,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:13,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:12:13,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:13,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1188956653, now seen corresponding path program 1 times [2023-08-24 00:12:13,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:13,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357069708] [2023-08-24 00:12:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:13,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:13,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:13,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357069708] [2023-08-24 00:12:13,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357069708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:12:13,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363152486] [2023-08-24 00:12:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:13,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:13,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:13,554 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:12:13,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 00:12:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:13,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:12:13,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:12:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:13,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:12:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:13,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363152486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:12:13,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:12:13,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:12:13,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9026466] [2023-08-24 00:12:13,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:12:13,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:12:13,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:12:13,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:12:13,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 00:12:13,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:13,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:13,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 00:12:13,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:14,425 INFO L124 PetriNetUnfolderBase]: 10623/16504 cut-off events. [2023-08-24 00:12:14,426 INFO L125 PetriNetUnfolderBase]: For 685/685 co-relation queries the response was YES. [2023-08-24 00:12:14,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32633 conditions, 16504 events. 10623/16504 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 107946 event pairs, 9818 based on Foata normal form. 3/14244 useless extension candidates. Maximal degree in co-relation 32605. Up to 15417 conditions per place. [2023-08-24 00:12:14,469 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 57 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-24 00:12:14,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 312 flow [2023-08-24 00:12:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:12:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:12:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1354 transitions. [2023-08-24 00:12:14,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558922558922559 [2023-08-24 00:12:14,472 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1354 transitions. [2023-08-24 00:12:14,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1354 transitions. [2023-08-24 00:12:14,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:14,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1354 transitions. [2023-08-24 00:12:14,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 225.66666666666666) internal successors, (1354), 6 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:14,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:14,478 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:14,478 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1354 transitions. [2023-08-24 00:12:14,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 312 flow [2023-08-24 00:12:14,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:12:14,480 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2023-08-24 00:12:14,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-08-24 00:12:14,481 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-08-24 00:12:14,481 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2023-08-24 00:12:14,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:14,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:14,481 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:12:14,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 00:12:14,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:14,686 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:12:14,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash -871778709, now seen corresponding path program 2 times [2023-08-24 00:12:14,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:14,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912073516] [2023-08-24 00:12:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:14,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:14,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:14,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912073516] [2023-08-24 00:12:14,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912073516] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:12:14,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627516719] [2023-08-24 00:12:14,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:12:14,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:14,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:14,769 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:12:14,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 00:12:14,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 00:12:14,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:12:14,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 00:12:14,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:12:14,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-24 00:12:14,898 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:12:14,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 00:12:14,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-24 00:12:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 00:12:14,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:12:14,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627516719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:12:14,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:12:14,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-24 00:12:14,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090713128] [2023-08-24 00:12:14,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:12:14,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:12:14,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:12:14,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 00:12:14,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 495 [2023-08-24 00:12:14,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 180.5) internal successors, (1083), 6 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:14,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:14,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 495 [2023-08-24 00:12:14,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:16,150 INFO L124 PetriNetUnfolderBase]: 11337/17862 cut-off events. [2023-08-24 00:12:16,150 INFO L125 PetriNetUnfolderBase]: For 682/682 co-relation queries the response was YES. [2023-08-24 00:12:16,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35655 conditions, 17862 events. 11337/17862 cut-off events. For 682/682 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 121328 event pairs, 2898 based on Foata normal form. 0/15773 useless extension candidates. Maximal degree in co-relation 35619. Up to 13547 conditions per place. [2023-08-24 00:12:16,196 INFO L140 encePairwiseOnDemand]: 485/495 looper letters, 126 selfloop transitions, 14 changer transitions 14/165 dead transitions. [2023-08-24 00:12:16,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 165 transitions, 731 flow [2023-08-24 00:12:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:12:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:12:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1229 transitions. [2023-08-24 00:12:16,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4138047138047138 [2023-08-24 00:12:16,199 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1229 transitions. [2023-08-24 00:12:16,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1229 transitions. [2023-08-24 00:12:16,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:16,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1229 transitions. [2023-08-24 00:12:16,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.83333333333334) internal successors, (1229), 6 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:16,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:16,204 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:16,204 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 6 states and 1229 transitions. [2023-08-24 00:12:16,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 165 transitions, 731 flow [2023-08-24 00:12:16,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 165 transitions, 717 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:12:16,207 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 293 flow [2023-08-24 00:12:16,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-08-24 00:12:16,208 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 20 predicate places. [2023-08-24 00:12:16,208 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 293 flow [2023-08-24 00:12:16,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 180.5) internal successors, (1083), 6 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:16,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:16,208 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 00:12:16,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 00:12:16,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:16,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:12:16,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:16,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1965936650, now seen corresponding path program 1 times [2023-08-24 00:12:16,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:16,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244785562] [2023-08-24 00:12:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:16,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 00:12:16,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:16,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244785562] [2023-08-24 00:12:16,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244785562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:12:16,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236296358] [2023-08-24 00:12:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:16,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:16,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:16,470 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:12:16,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 00:12:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:16,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:12:16,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:12:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 00:12:16,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:12:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 00:12:16,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236296358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:12:16,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:12:16,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 00:12:16,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083877407] [2023-08-24 00:12:16,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:12:16,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:12:16,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:16,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:12:16,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 00:12:16,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 00:12:16,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 293 flow. Second operand has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:16,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:16,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 00:12:16,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:17,678 INFO L124 PetriNetUnfolderBase]: 10793/17168 cut-off events. [2023-08-24 00:12:17,679 INFO L125 PetriNetUnfolderBase]: For 5746/5754 co-relation queries the response was YES. [2023-08-24 00:12:17,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38214 conditions, 17168 events. 10793/17168 cut-off events. For 5746/5754 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 117139 event pairs, 9515 based on Foata normal form. 6/16123 useless extension candidates. Maximal degree in co-relation 38155. Up to 16254 conditions per place. [2023-08-24 00:12:17,735 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 69 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-08-24 00:12:17,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 92 transitions, 489 flow [2023-08-24 00:12:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:12:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:12:17,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2653 transitions. [2023-08-24 00:12:17,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44663299663299666 [2023-08-24 00:12:17,741 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2653 transitions. [2023-08-24 00:12:17,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2653 transitions. [2023-08-24 00:12:17,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:17,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2653 transitions. [2023-08-24 00:12:17,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 221.08333333333334) internal successors, (2653), 12 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:17,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:17,752 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:17,753 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 293 flow. Second operand 12 states and 2653 transitions. [2023-08-24 00:12:17,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 92 transitions, 489 flow [2023-08-24 00:12:17,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 92 transitions, 489 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:12:17,764 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 377 flow [2023-08-24 00:12:17,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=377, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2023-08-24 00:12:17,765 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 37 predicate places. [2023-08-24 00:12:17,765 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 377 flow [2023-08-24 00:12:17,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:17,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:17,766 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 00:12:17,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-24 00:12:17,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:17,970 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:12:17,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:17,971 INFO L85 PathProgramCache]: Analyzing trace with hash -901075190, now seen corresponding path program 2 times [2023-08-24 00:12:17,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:17,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541314868] [2023-08-24 00:12:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:17,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:12:17,997 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:12:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:12:18,020 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:12:18,020 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:12:18,020 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-24 00:12:18,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-24 00:12:18,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-24 00:12:18,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-24 00:12:18,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-24 00:12:18,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 00:12:18,021 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-08-24 00:12:18,022 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:12:18,022 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:12:18,053 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 00:12:18,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 00:12:18,127 INFO L124 PetriNetUnfolderBase]: 110/641 cut-off events. [2023-08-24 00:12:18,127 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 00:12:18,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 641 events. 110/641 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2834 event pairs, 1 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2023-08-24 00:12:18,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 00:12:18,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 342 transitions, 714 flow [2023-08-24 00:12:18,138 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:12:18,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 342 transitions, 714 flow [2023-08-24 00:12:18,139 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 342 transitions, 714 flow [2023-08-24 00:12:18,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 00:12:18,346 INFO L124 PetriNetUnfolderBase]: 110/641 cut-off events. [2023-08-24 00:12:18,346 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 00:12:18,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 641 events. 110/641 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2834 event pairs, 1 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2023-08-24 00:12:18,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 66456 [2023-08-24 00:12:21,386 INFO L134 LiptonReduction]: Checked pairs total: 111148 [2023-08-24 00:12:21,386 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-08-24 00:12:21,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:12:21,388 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;@4988b293, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:12:21,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 00:12:21,389 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:12:21,389 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-08-24 00:12:21,389 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:12:21,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:21,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:12:21,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:12:21,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:21,389 INFO L85 PathProgramCache]: Analyzing trace with hash 323289153, now seen corresponding path program 1 times [2023-08-24 00:12:21,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:21,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683154216] [2023-08-24 00:12:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:21,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:21,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:21,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683154216] [2023-08-24 00:12:21,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683154216] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:12:21,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:12:21,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:12:21,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3676365] [2023-08-24 00:12:21,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:12:21,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:12:21,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:21,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:12:21,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:12:21,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 00:12:21,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:21,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:21,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 00:12:21,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:36,546 INFO L124 PetriNetUnfolderBase]: 199024/283218 cut-off events. [2023-08-24 00:12:36,546 INFO L125 PetriNetUnfolderBase]: For 3132/3132 co-relation queries the response was YES. [2023-08-24 00:12:37,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544637 conditions, 283218 events. 199024/283218 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 7667. Compared 2271080 event pairs, 188343 based on Foata normal form. 51886/290674 useless extension candidates. Maximal degree in co-relation 50654. Up to 259483 conditions per place. [2023-08-24 00:12:38,024 INFO L140 encePairwiseOnDemand]: 576/621 looper letters, 69 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-24 00:12:38,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 352 flow [2023-08-24 00:12:38,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:12:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:12:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 933 transitions. [2023-08-24 00:12:38,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500805152979066 [2023-08-24 00:12:38,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 933 transitions. [2023-08-24 00:12:38,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 933 transitions. [2023-08-24 00:12:38,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:38,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 933 transitions. [2023-08-24 00:12:38,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:38,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 621.0) internal successors, (2484), 4 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:38,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 621.0) internal successors, (2484), 4 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:38,030 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 933 transitions. [2023-08-24 00:12:38,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 352 flow [2023-08-24 00:12:38,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:12:38,033 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 220 flow [2023-08-24 00:12:38,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2023-08-24 00:12:38,034 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-08-24 00:12:38,034 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 220 flow [2023-08-24 00:12:38,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:38,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:38,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:12:38,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 00:12:38,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:12:38,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash 559044108, now seen corresponding path program 1 times [2023-08-24 00:12:38,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:38,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251041815] [2023-08-24 00:12:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:38,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:38,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:38,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251041815] [2023-08-24 00:12:38,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251041815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:12:38,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490534644] [2023-08-24 00:12:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:38,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:38,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:38,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:12:38,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 00:12:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:38,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-24 00:12:38,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:12:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:12:38,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:12:38,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490534644] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:12:38,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:12:38,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 00:12:38,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039227453] [2023-08-24 00:12:38,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:12:38,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:12:38,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:38,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:12:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:12:38,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 00:12:38,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:38,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:38,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 00:12:38,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:52,908 INFO L124 PetriNetUnfolderBase]: 199267/282410 cut-off events. [2023-08-24 00:12:52,908 INFO L125 PetriNetUnfolderBase]: For 3094/3094 co-relation queries the response was YES. [2023-08-24 00:12:53,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543876 conditions, 282410 events. 199267/282410 cut-off events. For 3094/3094 co-relation queries the response was YES. Maximal size of possible extension queue 7610. Compared 2244601 event pairs, 123187 based on Foata normal form. 0/238132 useless extension candidates. Maximal degree in co-relation 543862. Up to 259453 conditions per place. [2023-08-24 00:12:54,316 INFO L140 encePairwiseOnDemand]: 618/621 looper letters, 85 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-24 00:12:54,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 426 flow [2023-08-24 00:12:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:12:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:12:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-24 00:12:54,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863123993558776 [2023-08-24 00:12:54,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-24 00:12:54,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-24 00:12:54,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:54,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-24 00:12:54,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:54,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 621.0) internal successors, (2484), 4 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:54,324 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 621.0) internal successors, (2484), 4 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:54,324 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 220 flow. Second operand 3 states and 906 transitions. [2023-08-24 00:12:54,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 426 flow [2023-08-24 00:12:54,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 106 transitions, 422 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:12:54,326 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 228 flow [2023-08-24 00:12:54,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2023-08-24 00:12:54,326 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-08-24 00:12:54,326 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 228 flow [2023-08-24 00:12:54,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:54,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:54,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:12:54,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 00:12:54,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 00:12:54,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:12:54,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash 162791803, now seen corresponding path program 1 times [2023-08-24 00:12:54,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:54,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114603566] [2023-08-24 00:12:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:54,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:54,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:54,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114603566] [2023-08-24 00:12:54,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114603566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:12:54,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347740915] [2023-08-24 00:12:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:54,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:54,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:54,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:12:54,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 00:12:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:54,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:12:54,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:12:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:54,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:12:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:54,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347740915] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:12:54,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:12:54,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:12:54,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640312216] [2023-08-24 00:12:54,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:12:54,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:12:54,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:12:54,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:12:54,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 00:12:54,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:54,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:54,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 00:12:54,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:13:09,213 INFO L124 PetriNetUnfolderBase]: 200915/283582 cut-off events. [2023-08-24 00:13:09,213 INFO L125 PetriNetUnfolderBase]: For 10256/10256 co-relation queries the response was YES. [2023-08-24 00:13:09,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552245 conditions, 283582 events. 200915/283582 cut-off events. For 10256/10256 co-relation queries the response was YES. Maximal size of possible extension queue 7564. Compared 2229964 event pairs, 188343 based on Foata normal form. 3/242695 useless extension candidates. Maximal degree in co-relation 552216. Up to 259469 conditions per place. [2023-08-24 00:13:10,741 INFO L140 encePairwiseOnDemand]: 618/621 looper letters, 70 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-08-24 00:13:10,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 390 flow [2023-08-24 00:13:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:13:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:13:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1715 transitions. [2023-08-24 00:13:10,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46027911969940954 [2023-08-24 00:13:10,745 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1715 transitions. [2023-08-24 00:13:10,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1715 transitions. [2023-08-24 00:13:10,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:13:10,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1715 transitions. [2023-08-24 00:13:10,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.8333333333333) internal successors, (1715), 6 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:10,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 621.0) internal successors, (4347), 7 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:10,751 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 621.0) internal successors, (4347), 7 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:10,751 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 228 flow. Second operand 6 states and 1715 transitions. [2023-08-24 00:13:10,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 390 flow [2023-08-24 00:13:10,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:13:10,758 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 262 flow [2023-08-24 00:13:10,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2023-08-24 00:13:10,759 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2023-08-24 00:13:10,759 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 262 flow [2023-08-24 00:13:10,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:10,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:13:10,759 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:13:10,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 00:13:10,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 00:13:10,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:13:10,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:13:10,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1551228208, now seen corresponding path program 2 times [2023-08-24 00:13:10,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:13:10,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890626113] [2023-08-24 00:13:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:13:10,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:13:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:13:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:13:11,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:13:11,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890626113] [2023-08-24 00:13:11,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890626113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:13:11,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367889130] [2023-08-24 00:13:11,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:13:11,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:13:11,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:13:11,012 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:13:11,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 00:13:11,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 00:13:11,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:13:11,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 00:13:11,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:13:11,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-24 00:13:11,124 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:13:11,124 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 00:13:11,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-24 00:13:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 00:13:11,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:13:11,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367889130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:13:11,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:13:11,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-24 00:13:11,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014050386] [2023-08-24 00:13:11,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:13:11,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:13:11,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:13:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:13:11,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 00:13:11,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 621 [2023-08-24 00:13:11,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 232.33333333333334) internal successors, (1394), 6 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:11,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:13:11,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 621 [2023-08-24 00:13:11,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:13:30,791 INFO L124 PetriNetUnfolderBase]: 259107/362826 cut-off events. [2023-08-24 00:13:30,792 INFO L125 PetriNetUnfolderBase]: For 12861/12861 co-relation queries the response was YES. [2023-08-24 00:13:31,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716527 conditions, 362826 events. 259107/362826 cut-off events. For 12861/12861 co-relation queries the response was YES. Maximal size of possible extension queue 9582. Compared 2869562 event pairs, 59908 based on Foata normal form. 0/319275 useless extension candidates. Maximal degree in co-relation 716490. Up to 299154 conditions per place. [2023-08-24 00:13:32,602 INFO L140 encePairwiseOnDemand]: 609/621 looper letters, 194 selfloop transitions, 18 changer transitions 0/227 dead transitions. [2023-08-24 00:13:32,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 227 transitions, 1003 flow [2023-08-24 00:13:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:13:32,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:13:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1603 transitions. [2023-08-24 00:13:32,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302200751476114 [2023-08-24 00:13:32,606 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1603 transitions. [2023-08-24 00:13:32,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1603 transitions. [2023-08-24 00:13:32,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:13:32,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1603 transitions. [2023-08-24 00:13:32,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 267.1666666666667) internal successors, (1603), 6 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:32,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 621.0) internal successors, (4347), 7 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:32,612 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 621.0) internal successors, (4347), 7 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:32,612 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 262 flow. Second operand 6 states and 1603 transitions. [2023-08-24 00:13:32,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 227 transitions, 1003 flow [2023-08-24 00:13:32,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 227 transitions, 989 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:13:32,619 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 375 flow [2023-08-24 00:13:32,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2023-08-24 00:13:32,619 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 20 predicate places. [2023-08-24 00:13:32,619 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 375 flow [2023-08-24 00:13:32,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 232.33333333333334) internal successors, (1394), 6 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:32,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:13:32,620 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 00:13:32,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 00:13:32,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 00:13:32,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:13:32,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:13:32,824 INFO L85 PathProgramCache]: Analyzing trace with hash -291570877, now seen corresponding path program 1 times [2023-08-24 00:13:32,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:13:32,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813492060] [2023-08-24 00:13:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:13:32,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:13:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:13:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 00:13:32,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:13:32,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813492060] [2023-08-24 00:13:32,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813492060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:13:32,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353815372] [2023-08-24 00:13:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:13:32,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:13:32,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:13:32,878 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:13:32,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 00:13:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:13:32,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:13:32,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:13:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 00:13:32,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:13:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 00:13:33,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353815372] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:13:33,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:13:33,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 00:13:33,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012706980] [2023-08-24 00:13:33,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:13:33,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:13:33,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:13:33,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:13:33,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 00:13:33,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 00:13:33,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 375 flow. Second operand has 13 states, 13 states have (on average 274.46153846153845) internal successors, (3568), 13 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:33,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:13:33,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 00:13:33,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:13:50,726 INFO L124 PetriNetUnfolderBase]: 202268/289016 cut-off events. [2023-08-24 00:13:50,726 INFO L125 PetriNetUnfolderBase]: For 119343/119693 co-relation queries the response was YES. [2023-08-24 00:13:52,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641979 conditions, 289016 events. 202268/289016 cut-off events. For 119343/119693 co-relation queries the response was YES. Maximal size of possible extension queue 8458. Compared 2349117 event pairs, 179636 based on Foata normal form. 6/269885 useless extension candidates. Maximal degree in co-relation 641919. Up to 267869 conditions per place. [2023-08-24 00:13:52,782 INFO L140 encePairwiseOnDemand]: 618/621 looper letters, 86 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2023-08-24 00:13:52,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 116 transitions, 605 flow [2023-08-24 00:13:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:13:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:13:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3362 transitions. [2023-08-24 00:13:52,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45115405260332797 [2023-08-24 00:13:52,787 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3362 transitions. [2023-08-24 00:13:52,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3362 transitions. [2023-08-24 00:13:52,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:13:52,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3362 transitions. [2023-08-24 00:13:52,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 280.1666666666667) internal successors, (3362), 12 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:52,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 621.0) internal successors, (8073), 13 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:52,797 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 621.0) internal successors, (8073), 13 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:52,797 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 375 flow. Second operand 12 states and 3362 transitions. [2023-08-24 00:13:52,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 116 transitions, 605 flow [2023-08-24 00:13:52,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 116 transitions, 605 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:13:52,982 INFO L231 Difference]: Finished difference. Result has 125 places, 116 transitions, 459 flow [2023-08-24 00:13:52,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=125, PETRI_TRANSITIONS=116} [2023-08-24 00:13:52,983 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 37 predicate places. [2023-08-24 00:13:52,983 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 116 transitions, 459 flow [2023-08-24 00:13:52,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 274.46153846153845) internal successors, (3568), 13 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:52,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:13:52,983 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 00:13:52,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-24 00:13:53,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 00:13:53,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:13:53,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:13:53,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1688672413, now seen corresponding path program 2 times [2023-08-24 00:13:53,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:13:53,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917427185] [2023-08-24 00:13:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:13:53,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:13:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:13:53,211 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:13:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:13:53,237 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:13:53,237 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:13:53,237 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-24 00:13:53,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-24 00:13:53,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-24 00:13:53,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-24 00:13:53,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-24 00:13:53,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-24 00:13:53,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 00:13:53,238 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-08-24 00:13:53,238 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:13:53,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 00:13:53,261 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 00:13:53,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 00:13:53,349 INFO L124 PetriNetUnfolderBase]: 157/912 cut-off events. [2023-08-24 00:13:53,349 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 00:13:53,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 912 events. 157/912 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4361 event pairs, 6 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 661. Up to 32 conditions per place. [2023-08-24 00:13:53,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 00:13:53,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 351 places, 415 transitions, 874 flow [2023-08-24 00:13:53,368 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:13:53,368 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 351 places, 415 transitions, 874 flow [2023-08-24 00:13:53,368 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 351 places, 415 transitions, 874 flow [2023-08-24 00:13:53,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 00:13:53,452 INFO L124 PetriNetUnfolderBase]: 157/912 cut-off events. [2023-08-24 00:13:53,452 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 00:13:53,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 912 events. 157/912 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4361 event pairs, 6 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 661. Up to 32 conditions per place. [2023-08-24 00:13:53,497 INFO L119 LiptonReduction]: Number of co-enabled transitions 109624 [2023-08-24 00:13:57,003 INFO L134 LiptonReduction]: Checked pairs total: 192660 [2023-08-24 00:13:57,003 INFO L136 LiptonReduction]: Total number of compositions: 341 [2023-08-24 00:13:57,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:13:57,005 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;@4988b293, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:13:57,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-24 00:13:57,007 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:13:57,007 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-08-24 00:13:57,007 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:13:57,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:13:57,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:13:57,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-24 00:13:57,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:13:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash -977671747, now seen corresponding path program 1 times [2023-08-24 00:13:57,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:13:57,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578414233] [2023-08-24 00:13:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:13:57,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:13:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:13:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:13:57,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:13:57,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578414233] [2023-08-24 00:13:57,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578414233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:13:57,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:13:57,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:13:57,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947578789] [2023-08-24 00:13:57,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:13:57,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:13:57,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:13:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:13:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:13:57,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 756 [2023-08-24 00:13:57,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:13:57,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:13:57,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 756 [2023-08-24 00:13:57,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand