/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_73-funloop_hard_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:06:36,271 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:06:36,354 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 00:06:36,358 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:06:36,359 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:06:36,391 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:06:36,391 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:06:36,394 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:06:36,395 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:06:36,395 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:06:36,395 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:06:36,396 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:06:36,396 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:06:36,397 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:06:36,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:06:36,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:06:36,397 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:06:36,398 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:06:36,398 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:06:36,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:06:36,399 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:06:36,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:06:36,400 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:06:36,401 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:06:36,401 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:06:36,401 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:06:36,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:06:36,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:06:36,402 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:06:36,402 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:06:36,402 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:06:36,403 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:06:36,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:06:36,403 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:06:36,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:06:36,404 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:06:36,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:06:36,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:06:36,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:06:36,755 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:06:36,755 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:06:36,756 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-24 00:06:37,935 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:06:38,268 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:06:38,269 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-24 00:06:38,283 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52e7ae685/6d07b7171af74713b61932a188a1b56c/FLAG709b5869a [2023-08-24 00:06:38,299 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52e7ae685/6d07b7171af74713b61932a188a1b56c [2023-08-24 00:06:38,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:06:38,306 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:06:38,307 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:06:38,307 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:06:38,309 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:06:38,311 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:38,312 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc4af40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38, skipping insertion in model container [2023-08-24 00:06:38,312 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:38,377 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:06:38,740 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_73-funloop_hard_racefree.i[41323,41336] [2023-08-24 00:06:38,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:06:38,800 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:06:38,827 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:06:38,829 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:06:38,835 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-24 00:06:38,843 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_73-funloop_hard_racefree.i[41323,41336] [2023-08-24 00:06:38,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:06:38,937 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:06:38,938 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38 WrapperNode [2023-08-24 00:06:38,941 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:06:38,943 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:06:38,943 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:06:38,943 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:06:38,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:38,978 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:39,014 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 253 [2023-08-24 00:06:39,015 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:06:39,015 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:06:39,015 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:06:39,015 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:06:39,023 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:39,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:39,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:39,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:39,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:39,056 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:39,073 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:39,075 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:39,077 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:06:39,078 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:06:39,078 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:06:39,078 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:06:39,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (1/1) ... [2023-08-24 00:06:39,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:06:39,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:06:39,113 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 00:06:39,137 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 00:06:39,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:06:39,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:06:39,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:06:39,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:06:39,149 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:06:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:06:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 00:06:39,150 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 00:06:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:06:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:06:39,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:06:39,152 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 00:06:39,338 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:06:39,340 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:06:39,628 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:06:39,636 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:06:39,636 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-24 00:06:39,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:06:39 BoogieIcfgContainer [2023-08-24 00:06:39,638 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:06:39,640 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:06:39,640 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:06:39,643 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:06:39,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:06:38" (1/3) ... [2023-08-24 00:06:39,644 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30cc5863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:06:39, skipping insertion in model container [2023-08-24 00:06:39,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:06:38" (2/3) ... [2023-08-24 00:06:39,644 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30cc5863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:06:39, skipping insertion in model container [2023-08-24 00:06:39,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:06:39" (3/3) ... [2023-08-24 00:06:39,645 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2023-08-24 00:06:39,661 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:06:39,661 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-24 00:06:39,661 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:06:39,717 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 00:06:39,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 249 transitions, 506 flow [2023-08-24 00:06:39,847 INFO L124 PetriNetUnfolderBase]: 73/386 cut-off events. [2023-08-24 00:06:39,848 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 00:06:39,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 386 events. 73/386 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1717 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 211. Up to 8 conditions per place. [2023-08-24 00:06:39,859 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 249 transitions, 506 flow [2023-08-24 00:06:39,870 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 244 transitions, 493 flow [2023-08-24 00:06:39,874 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:06:39,887 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 244 transitions, 493 flow [2023-08-24 00:06:39,895 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 244 transitions, 493 flow [2023-08-24 00:06:39,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 244 transitions, 493 flow [2023-08-24 00:06:39,968 INFO L124 PetriNetUnfolderBase]: 72/381 cut-off events. [2023-08-24 00:06:39,968 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:06:39,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 381 events. 72/381 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1675 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 211. Up to 8 conditions per place. [2023-08-24 00:06:39,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 19734 [2023-08-24 00:06:43,158 INFO L134 LiptonReduction]: Checked pairs total: 31732 [2023-08-24 00:06:43,159 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-24 00:06:43,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:06:43,189 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;@333c66fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:06:43,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 00:06:43,200 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:06:43,200 INFO L124 PetriNetUnfolderBase]: 12/43 cut-off events. [2023-08-24 00:06:43,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:06:43,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:06:43,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:06:43,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 00:06:43,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:06:43,207 INFO L85 PathProgramCache]: Analyzing trace with hash -351581278, now seen corresponding path program 1 times [2023-08-24 00:06:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:06:43,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259213139] [2023-08-24 00:06:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:06:43,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:06:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:06:43,476 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 00:06:43,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:06:43,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259213139] [2023-08-24 00:06:43,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259213139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:06:43,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:06:43,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:06:43,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147891346] [2023-08-24 00:06:43,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:06:43,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:06:43,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:06:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:06:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:06:43,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 437 [2023-08-24 00:06:43,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 97 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 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 00:06:43,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:06:43,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 437 [2023-08-24 00:06:43,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:06:43,713 INFO L124 PetriNetUnfolderBase]: 579/1212 cut-off events. [2023-08-24 00:06:43,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:06:43,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 1212 events. 579/1212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6870 event pairs, 465 based on Foata normal form. 213/1209 useless extension candidates. Maximal degree in co-relation 2191. Up to 1060 conditions per place. [2023-08-24 00:06:43,722 INFO L140 encePairwiseOnDemand]: 402/437 looper letters, 51 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-24 00:06:43,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 243 flow [2023-08-24 00:06:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:06:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:06:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 680 transitions. [2023-08-24 00:06:43,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186880244088482 [2023-08-24 00:06:43,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 680 transitions. [2023-08-24 00:06:43,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 680 transitions. [2023-08-24 00:06:43,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:06:43,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 680 transitions. [2023-08-24 00:06:43,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 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 00:06:43,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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 00:06:43,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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 00:06:43,753 INFO L175 Difference]: Start difference. First operand has 63 places, 97 transitions, 199 flow. Second operand 3 states and 680 transitions. [2023-08-24 00:06:43,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 243 flow [2023-08-24 00:06:43,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:06:43,757 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 147 flow [2023-08-24 00:06:43,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-08-24 00:06:43,762 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-24 00:06:43,762 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 147 flow [2023-08-24 00:06:43,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 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 00:06:43,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:06:43,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-24 00:06:43,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:06:43,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 00:06:43,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:06:43,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1247129464, now seen corresponding path program 1 times [2023-08-24 00:06:43,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:06:43,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773052021] [2023-08-24 00:06:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:06:43,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:06:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:06:43,851 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 00:06:43,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:06:43,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773052021] [2023-08-24 00:06:43,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773052021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:06:43,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175918994] [2023-08-24 00:06:43,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:06:43,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:06:43,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:06:43,857 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 00:06:43,879 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 00:06:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:06:43,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:06:43,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:06:43,985 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 00:06:43,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:06:44,004 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 00:06:44,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175918994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:06:44,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:06:44,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:06:44,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411762074] [2023-08-24 00:06:44,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:06:44,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:06:44,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:06:44,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:06:44,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:06:44,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 437 [2023-08-24 00:06:44,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 147 flow. Second operand has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:06:44,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:06:44,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 437 [2023-08-24 00:06:44,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:06:44,234 INFO L124 PetriNetUnfolderBase]: 579/1215 cut-off events. [2023-08-24 00:06:44,234 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:06:44,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 1215 events. 579/1215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6871 event pairs, 465 based on Foata normal form. 0/999 useless extension candidates. Maximal degree in co-relation 2282. Up to 1060 conditions per place. [2023-08-24 00:06:44,241 INFO L140 encePairwiseOnDemand]: 434/437 looper letters, 51 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-24 00:06:44,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 271 flow [2023-08-24 00:06:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:06:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:06:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1247 transitions. [2023-08-24 00:06:44,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755911517925248 [2023-08-24 00:06:44,245 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1247 transitions. [2023-08-24 00:06:44,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1247 transitions. [2023-08-24 00:06:44,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:06:44,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1247 transitions. [2023-08-24 00:06:44,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.83333333333334) internal successors, (1247), 6 states have internal predecessors, (1247), 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 00:06:44,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:06:44,258 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:06:44,261 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 147 flow. Second operand 6 states and 1247 transitions. [2023-08-24 00:06:44,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 271 flow [2023-08-24 00:06:44,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 267 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:06:44,269 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 179 flow [2023-08-24 00:06:44,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-08-24 00:06:44,271 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-24 00:06:44,271 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 179 flow [2023-08-24 00:06:44,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:06:44,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:06:44,273 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-24 00:06:44,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 00:06:44,479 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 00:06:44,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 00:06:44,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:06:44,480 INFO L85 PathProgramCache]: Analyzing trace with hash 506844091, now seen corresponding path program 2 times [2023-08-24 00:06:44,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:06:44,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880265911] [2023-08-24 00:06:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:06:44,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:06:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:06:44,614 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 00:06:44,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:06:44,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880265911] [2023-08-24 00:06:44,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880265911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:06:44,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083317146] [2023-08-24 00:06:44,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:06:44,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:06:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:06:44,617 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 00:06:44,620 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 00:06:44,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:06:44,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:06:44,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:06:44,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:06:44,733 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 00:06:44,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:06:44,791 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 00:06:44,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083317146] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:06:44,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:06:44,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 00:06:44,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548514433] [2023-08-24 00:06:44,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:06:44,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:06:44,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:06:44,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:06:44,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 00:06:44,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 437 [2023-08-24 00:06:44,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 179 flow. Second operand has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:06:44,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:06:44,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 437 [2023-08-24 00:06:44,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:06:45,019 INFO L124 PetriNetUnfolderBase]: 579/1221 cut-off events. [2023-08-24 00:06:45,019 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-24 00:06:45,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2331 conditions, 1221 events. 579/1221 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6890 event pairs, 465 based on Foata normal form. 6/1012 useless extension candidates. Maximal degree in co-relation 2273. Up to 1060 conditions per place. [2023-08-24 00:06:45,027 INFO L140 encePairwiseOnDemand]: 434/437 looper letters, 51 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-08-24 00:06:45,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 339 flow [2023-08-24 00:06:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:06:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:06:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2444 transitions. [2023-08-24 00:06:45,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660564454614798 [2023-08-24 00:06:45,033 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2444 transitions. [2023-08-24 00:06:45,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2444 transitions. [2023-08-24 00:06:45,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:06:45,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2444 transitions. [2023-08-24 00:06:45,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 203.66666666666666) internal successors, (2444), 12 states have internal predecessors, (2444), 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 00:06:45,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 437.0) internal successors, (5681), 13 states have internal predecessors, (5681), 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 00:06:45,051 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 437.0) internal successors, (5681), 13 states have internal predecessors, (5681), 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 00:06:45,051 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 179 flow. Second operand 12 states and 2444 transitions. [2023-08-24 00:06:45,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 339 flow [2023-08-24 00:06:45,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 325 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:06:45,054 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 249 flow [2023-08-24 00:06:45,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=249, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2023-08-24 00:06:45,055 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-08-24 00:06:45,056 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 249 flow [2023-08-24 00:06:45,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:06:45,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:06:45,057 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-24 00:06:45,067 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 00:06:45,264 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 00:06:45,264 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 00:06:45,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:06:45,265 INFO L85 PathProgramCache]: Analyzing trace with hash -213366117, now seen corresponding path program 3 times [2023-08-24 00:06:45,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:06:45,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021848201] [2023-08-24 00:06:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:06:45,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:06:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:06:45,317 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:06:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:06:45,380 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:06:45,381 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:06:45,381 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-24 00:06:45,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-24 00:06:45,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-24 00:06:45,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-24 00:06:45,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-24 00:06:45,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 00:06:45,384 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 00:06:45,387 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:06:45,387 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:06:45,431 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 00:06:45,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 320 transitions, 658 flow [2023-08-24 00:06:45,511 INFO L124 PetriNetUnfolderBase]: 118/619 cut-off events. [2023-08-24 00:06:45,511 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:06:45,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 619 events. 118/619 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3126 event pairs, 0 based on Foata normal form. 0/489 useless extension candidates. Maximal degree in co-relation 388. Up to 12 conditions per place. [2023-08-24 00:06:45,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 320 transitions, 658 flow [2023-08-24 00:06:45,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 320 transitions, 658 flow [2023-08-24 00:06:45,528 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:06:45,528 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 320 transitions, 658 flow [2023-08-24 00:06:45,528 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 320 transitions, 658 flow [2023-08-24 00:06:45,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 320 transitions, 658 flow [2023-08-24 00:06:45,597 INFO L124 PetriNetUnfolderBase]: 118/619 cut-off events. [2023-08-24 00:06:45,597 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:06:45,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 619 events. 118/619 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3126 event pairs, 0 based on Foata normal form. 0/489 useless extension candidates. Maximal degree in co-relation 388. Up to 12 conditions per place. [2023-08-24 00:06:45,631 INFO L119 LiptonReduction]: Number of co-enabled transitions 50508 [2023-08-24 00:06:49,013 INFO L134 LiptonReduction]: Checked pairs total: 86842 [2023-08-24 00:06:49,013 INFO L136 LiptonReduction]: Total number of compositions: 245 [2023-08-24 00:06:49,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:06:49,019 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;@333c66fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:06:49,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 00:06:49,022 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:06:49,023 INFO L124 PetriNetUnfolderBase]: 9/40 cut-off events. [2023-08-24 00:06:49,023 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 00:06:49,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:06:49,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:06:49,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-24 00:06:49,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:06:49,024 INFO L85 PathProgramCache]: Analyzing trace with hash -637519921, now seen corresponding path program 1 times [2023-08-24 00:06:49,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:06:49,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471827872] [2023-08-24 00:06:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:06:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:06:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:06:49,051 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 00:06:49,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:06:49,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471827872] [2023-08-24 00:06:49,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471827872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:06:49,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:06:49,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:06:49,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172997176] [2023-08-24 00:06:49,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:06:49,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:06:49,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:06:49,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:06:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:06:49,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 565 [2023-08-24 00:06:49,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 132 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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 00:06:49,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:06:49,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 565 [2023-08-24 00:06:49,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:06:51,464 INFO L124 PetriNetUnfolderBase]: 19961/30642 cut-off events. [2023-08-24 00:06:51,464 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-24 00:06:51,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58969 conditions, 30642 events. 19961/30642 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 949. Compared 212689 event pairs, 17166 based on Foata normal form. 5462/30472 useless extension candidates. Maximal degree in co-relation 20159. Up to 28224 conditions per place. [2023-08-24 00:06:51,696 INFO L140 encePairwiseOnDemand]: 522/565 looper letters, 73 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-24 00:06:51,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-08-24 00:06:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:06:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:06:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 878 transitions. [2023-08-24 00:06:51,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5179941002949853 [2023-08-24 00:06:51,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 878 transitions. [2023-08-24 00:06:51,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 878 transitions. [2023-08-24 00:06:51,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:06:51,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 878 transitions. [2023-08-24 00:06:51,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 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 00:06:51,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 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 00:06:51,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 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 00:06:51,706 INFO L175 Difference]: Start difference. First operand has 87 places, 132 transitions, 282 flow. Second operand 3 states and 878 transitions. [2023-08-24 00:06:51,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-08-24 00:06:51,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:06:51,712 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 214 flow [2023-08-24 00:06:51,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-08-24 00:06:51,714 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-24 00:06:51,715 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 214 flow [2023-08-24 00:06:51,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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 00:06:51,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:06:51,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:06:51,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 00:06:51,718 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-24 00:06:51,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:06:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash -494459733, now seen corresponding path program 1 times [2023-08-24 00:06:51,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:06:51,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025411909] [2023-08-24 00:06:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:06:51,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:06:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:06:51,785 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 00:06:51,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:06:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025411909] [2023-08-24 00:06:51,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025411909] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:06:51,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734574159] [2023-08-24 00:06:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:06:51,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:06:51,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:06:51,792 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 00:06:51,821 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 00:06:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:06:51,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-24 00:06:51,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:06:51,888 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 00:06:51,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:06:51,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734574159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:06:51,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:06:51,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 00:06:51,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842276878] [2023-08-24 00:06:51,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:06:51,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:06:51,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:06:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:06:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:06:51,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 565 [2023-08-24 00:06:51,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:06:51,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:06:51,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 565 [2023-08-24 00:06:51,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:06:53,896 INFO L124 PetriNetUnfolderBase]: 19644/30266 cut-off events. [2023-08-24 00:06:53,896 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-24 00:06:53,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58589 conditions, 30266 events. 19644/30266 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 212551 event pairs, 8256 based on Foata normal form. 0/24592 useless extension candidates. Maximal degree in co-relation 58576. Up to 28177 conditions per place. [2023-08-24 00:06:54,169 INFO L140 encePairwiseOnDemand]: 562/565 looper letters, 91 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-24 00:06:54,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 436 flow [2023-08-24 00:06:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:06:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:06:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 855 transitions. [2023-08-24 00:06:54,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.504424778761062 [2023-08-24 00:06:54,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 855 transitions. [2023-08-24 00:06:54,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 855 transitions. [2023-08-24 00:06:54,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:06:54,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 855 transitions. [2023-08-24 00:06:54,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 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 00:06:54,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 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 00:06:54,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 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 00:06:54,179 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 214 flow. Second operand 3 states and 855 transitions. [2023-08-24 00:06:54,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 436 flow [2023-08-24 00:06:54,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:06:54,186 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 222 flow [2023-08-24 00:06:54,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-08-24 00:06:54,189 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-08-24 00:06:54,190 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 222 flow [2023-08-24 00:06:54,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:06:54,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:06:54,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:06:54,201 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 00:06:54,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:06:54,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-24 00:06:54,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:06:54,397 INFO L85 PathProgramCache]: Analyzing trace with hash -380324234, now seen corresponding path program 1 times [2023-08-24 00:06:54,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:06:54,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786917516] [2023-08-24 00:06:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:06:54,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:06:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:06:54,444 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 00:06:54,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:06:54,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786917516] [2023-08-24 00:06:54,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786917516] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:06:54,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532677932] [2023-08-24 00:06:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:06:54,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:06:54,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:06:54,449 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 00:06:54,451 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 00:06:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:06:54,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:06:54,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:06:54,548 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 00:06:54,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:06:54,561 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 00:06:54,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532677932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:06:54,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:06:54,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 00:06:54,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186235688] [2023-08-24 00:06:54,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:06:54,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:06:54,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:06:54,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:06:54,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 00:06:54,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 565 [2023-08-24 00:06:54,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 256.1666666666667) internal successors, (1537), 6 states have internal predecessors, (1537), 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 00:06:54,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:06:54,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 565 [2023-08-24 00:06:54,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:06:56,702 INFO L124 PetriNetUnfolderBase]: 20035/30550 cut-off events. [2023-08-24 00:06:56,703 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2023-08-24 00:06:56,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59453 conditions, 30550 events. 20035/30550 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 209549 event pairs, 17166 based on Foata normal form. 3/25130 useless extension candidates. Maximal degree in co-relation 59425. Up to 28195 conditions per place. [2023-08-24 00:06:56,883 INFO L140 encePairwiseOnDemand]: 562/565 looper letters, 74 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-24 00:06:56,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 392 flow [2023-08-24 00:06:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:06:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:06:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1605 transitions. [2023-08-24 00:06:56,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47345132743362833 [2023-08-24 00:06:56,889 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1605 transitions. [2023-08-24 00:06:56,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1605 transitions. [2023-08-24 00:06:56,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:06:56,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1605 transitions. [2023-08-24 00:06:56,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 267.5) internal successors, (1605), 6 states have internal predecessors, (1605), 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 00:06:56,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 565.0) internal successors, (3955), 7 states have internal predecessors, (3955), 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 00:06:56,899 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 565.0) internal successors, (3955), 7 states have internal predecessors, (3955), 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 00:06:56,899 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 222 flow. Second operand 6 states and 1605 transitions. [2023-08-24 00:06:56,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 392 flow [2023-08-24 00:06:56,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:06:56,904 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 256 flow [2023-08-24 00:06:56,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-08-24 00:06:56,906 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-08-24 00:06:56,906 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 256 flow [2023-08-24 00:06:56,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 256.1666666666667) internal successors, (1537), 6 states have internal predecessors, (1537), 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 00:06:56,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:06:56,907 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:06:56,917 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 00:06:57,113 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 00:06:57,114 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-24 00:06:57,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:06:57,114 INFO L85 PathProgramCache]: Analyzing trace with hash 543041434, now seen corresponding path program 2 times [2023-08-24 00:06:57,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:06:57,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791760463] [2023-08-24 00:06:57,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:06:57,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:06:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:06:57,214 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 00:06:57,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:06:57,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791760463] [2023-08-24 00:06:57,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791760463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:06:57,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612806597] [2023-08-24 00:06:57,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:06:57,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:06:57,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:06:57,217 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 00:06:57,219 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 00:06:57,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 00:06:57,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:06:57,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 00:06:57,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:06:57,328 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 00:06:57,394 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:06:57,394 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 00:06:57,426 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 00:06:57,482 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 00:06:57,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:06:57,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612806597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:06:57,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:06:57,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-24 00:06:57,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050953365] [2023-08-24 00:06:57,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:06:57,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:06:57,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:06:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:06:57,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-24 00:06:57,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 565 [2023-08-24 00:06:57,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 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 00:06:57,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:06:57,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 565 [2023-08-24 00:06:57,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:00,320 INFO L124 PetriNetUnfolderBase]: 28032/43743 cut-off events. [2023-08-24 00:07:00,320 INFO L125 PetriNetUnfolderBase]: For 1065/1065 co-relation queries the response was YES. [2023-08-24 00:07:00,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85575 conditions, 43743 events. 28032/43743 cut-off events. For 1065/1065 co-relation queries the response was YES. Maximal size of possible extension queue 1246. Compared 328023 event pairs, 4429 based on Foata normal form. 0/36155 useless extension candidates. Maximal degree in co-relation 85539. Up to 30481 conditions per place. [2023-08-24 00:07:00,615 INFO L140 encePairwiseOnDemand]: 555/565 looper letters, 201 selfloop transitions, 16 changer transitions 0/233 dead transitions. [2023-08-24 00:07:00,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 233 transitions, 996 flow [2023-08-24 00:07:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:07:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:07:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1486 transitions. [2023-08-24 00:07:00,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383480825958702 [2023-08-24 00:07:00,627 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1486 transitions. [2023-08-24 00:07:00,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1486 transitions. [2023-08-24 00:07:00,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:00,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1486 transitions. [2023-08-24 00:07:00,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 247.66666666666666) internal successors, (1486), 6 states have internal predecessors, (1486), 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 00:07:00,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 565.0) internal successors, (3955), 7 states have internal predecessors, (3955), 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 00:07:00,640 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 565.0) internal successors, (3955), 7 states have internal predecessors, (3955), 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 00:07:00,640 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 256 flow. Second operand 6 states and 1486 transitions. [2023-08-24 00:07:00,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 233 transitions, 996 flow [2023-08-24 00:07:00,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 233 transitions, 982 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:07:00,645 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 345 flow [2023-08-24 00:07:00,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2023-08-24 00:07:00,646 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 20 predicate places. [2023-08-24 00:07:00,646 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 345 flow [2023-08-24 00:07:00,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 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 00:07:00,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:00,647 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:07:00,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 00:07:00,856 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 00:07:00,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-24 00:07:00,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash -475831947, now seen corresponding path program 1 times [2023-08-24 00:07:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456444729] [2023-08-24 00:07:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 00:07:01,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:01,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456444729] [2023-08-24 00:07:01,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456444729] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:07:01,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811082354] [2023-08-24 00:07:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:01,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:01,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:07:01,030 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 00:07:01,032 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 00:07:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:01,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:07:01,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:07:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:07:01,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:07:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:07:01,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811082354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:07:01,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:07:01,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-24 00:07:01,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661123058] [2023-08-24 00:07:01,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:07:01,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 00:07:01,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 00:07:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-24 00:07:01,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 565 [2023-08-24 00:07:01,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 345 flow. Second operand has 14 states, 14 states have (on average 248.92857142857142) internal successors, (3485), 14 states have internal predecessors, (3485), 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 00:07:01,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:01,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 565 [2023-08-24 00:07:01,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:04,116 INFO L124 PetriNetUnfolderBase]: 25538/40428 cut-off events. [2023-08-24 00:07:04,117 INFO L125 PetriNetUnfolderBase]: For 8373/8373 co-relation queries the response was YES. [2023-08-24 00:07:04,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86768 conditions, 40428 events. 25538/40428 cut-off events. For 8373/8373 co-relation queries the response was YES. Maximal size of possible extension queue 1207. Compared 308920 event pairs, 331 based on Foata normal form. 33/35727 useless extension candidates. Maximal degree in co-relation 86709. Up to 36084 conditions per place. [2023-08-24 00:07:04,426 INFO L140 encePairwiseOnDemand]: 560/565 looper letters, 142 selfloop transitions, 14 changer transitions 0/174 dead transitions. [2023-08-24 00:07:04,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 849 flow [2023-08-24 00:07:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 00:07:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 00:07:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3601 transitions. [2023-08-24 00:07:04,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45524652338811633 [2023-08-24 00:07:04,436 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3601 transitions. [2023-08-24 00:07:04,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3601 transitions. [2023-08-24 00:07:04,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:04,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3601 transitions. [2023-08-24 00:07:04,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 257.2142857142857) internal successors, (3601), 14 states have internal predecessors, (3601), 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 00:07:04,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 565.0) internal successors, (8475), 15 states have internal predecessors, (8475), 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 00:07:04,460 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 565.0) internal successors, (8475), 15 states have internal predecessors, (8475), 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 00:07:04,460 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 345 flow. Second operand 14 states and 3601 transitions. [2023-08-24 00:07:04,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 849 flow [2023-08-24 00:07:04,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 849 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:07:04,488 INFO L231 Difference]: Finished difference. Result has 121 places, 117 transitions, 415 flow [2023-08-24 00:07:04,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=415, PETRI_PLACES=121, PETRI_TRANSITIONS=117} [2023-08-24 00:07:04,488 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 34 predicate places. [2023-08-24 00:07:04,489 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 117 transitions, 415 flow [2023-08-24 00:07:04,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 248.92857142857142) internal successors, (3485), 14 states have internal predecessors, (3485), 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 00:07:04,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:04,490 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 00:07:04,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 00:07:04,696 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 00:07:04,696 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-24 00:07:04,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:04,697 INFO L85 PathProgramCache]: Analyzing trace with hash -297660200, now seen corresponding path program 1 times [2023-08-24 00:07:04,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:04,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297832454] [2023-08-24 00:07:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:04,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:07:04,725 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:07:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:07:04,759 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:07:04,761 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:07:04,761 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-24 00:07:04,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-24 00:07:04,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-24 00:07:04,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-24 00:07:04,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-24 00:07:04,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-24 00:07:04,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 00:07:04,762 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-08-24 00:07:04,762 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:07:04,763 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:07:04,800 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 00:07:04,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 391 transitions, 812 flow [2023-08-24 00:07:04,909 INFO L124 PetriNetUnfolderBase]: 168/885 cut-off events. [2023-08-24 00:07:04,909 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:07:04,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 885 events. 168/885 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4743 event pairs, 1 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 627. Up to 16 conditions per place. [2023-08-24 00:07:04,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 391 transitions, 812 flow [2023-08-24 00:07:04,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 391 transitions, 812 flow [2023-08-24 00:07:04,940 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:07:04,940 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 391 transitions, 812 flow [2023-08-24 00:07:04,941 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 391 transitions, 812 flow [2023-08-24 00:07:04,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 391 transitions, 812 flow [2023-08-24 00:07:05,032 INFO L124 PetriNetUnfolderBase]: 168/885 cut-off events. [2023-08-24 00:07:05,032 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:07:05,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 885 events. 168/885 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4743 event pairs, 1 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 627. Up to 16 conditions per place. [2023-08-24 00:07:05,087 INFO L119 LiptonReduction]: Number of co-enabled transitions 90666 [2023-08-24 00:07:08,951 INFO L134 LiptonReduction]: Checked pairs total: 157121 [2023-08-24 00:07:08,952 INFO L136 LiptonReduction]: Total number of compositions: 302 [2023-08-24 00:07:08,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:07:08,954 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;@333c66fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:07:08,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-24 00:07:08,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:07:08,958 INFO L124 PetriNetUnfolderBase]: 12/44 cut-off events. [2023-08-24 00:07:08,958 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 00:07:08,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:08,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:07:08,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 00:07:08,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:08,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1019895654, now seen corresponding path program 1 times [2023-08-24 00:07:08,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:08,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989780554] [2023-08-24 00:07:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:08,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:08,982 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 00:07:08,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:08,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989780554] [2023-08-24 00:07:08,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989780554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:07:08,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:07:08,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:07:08,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138402818] [2023-08-24 00:07:08,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:07:08,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:07:08,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:08,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:07:08,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:07:08,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 693 [2023-08-24 00:07:08,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 165 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 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 00:07:08,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:08,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 693 [2023-08-24 00:07:08,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:52,187 INFO L124 PetriNetUnfolderBase]: 477490/661421 cut-off events. [2023-08-24 00:07:52,188 INFO L125 PetriNetUnfolderBase]: For 4158/4158 co-relation queries the response was YES. [2023-08-24 00:07:53,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274279 conditions, 661421 events. 477490/661421 cut-off events. For 4158/4158 co-relation queries the response was YES. Maximal size of possible extension queue 14787. Compared 5288678 event pairs, 422085 based on Foata normal form. 116547/658007 useless extension candidates. Maximal degree in co-relation 143396. Up to 610562 conditions per place. [2023-08-24 00:07:55,827 INFO L140 encePairwiseOnDemand]: 639/693 looper letters, 91 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2023-08-24 00:07:55,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 446 flow [2023-08-24 00:07:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:07:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:07:55,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1075 transitions. [2023-08-24 00:07:55,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.517075517075517 [2023-08-24 00:07:55,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1075 transitions. [2023-08-24 00:07:55,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1075 transitions. [2023-08-24 00:07:55,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:55,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1075 transitions. [2023-08-24 00:07:55,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.3333333333333) internal successors, (1075), 3 states have internal predecessors, (1075), 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 00:07:55,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 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 00:07:55,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 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 00:07:55,837 INFO L175 Difference]: Start difference. First operand has 108 places, 165 transitions, 360 flow. Second operand 3 states and 1075 transitions. [2023-08-24 00:07:55,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 446 flow [2023-08-24 00:07:55,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:07:55,840 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 270 flow [2023-08-24 00:07:55,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2023-08-24 00:07:55,841 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2023-08-24 00:07:55,841 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 270 flow [2023-08-24 00:07:55,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 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 00:07:55,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:55,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:07:55,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 00:07:55,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 00:07:55,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash -492302041, now seen corresponding path program 1 times [2023-08-24 00:07:55,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:55,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871489112] [2023-08-24 00:07:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:55,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:55,867 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 00:07:55,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:55,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871489112] [2023-08-24 00:07:55,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871489112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:07:55,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277367843] [2023-08-24 00:07:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:55,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:55,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:07:55,873 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 00:07:55,876 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 00:07:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:55,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-24 00:07:55,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:07:55,964 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 00:07:55,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:07:55,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277367843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:07:55,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:07:55,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 00:07:55,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249551263] [2023-08-24 00:07:55,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:07:55,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:07:55,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:55,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:07:55,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:07:55,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 693 [2023-08-24 00:07:55,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 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 00:07:55,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:55,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 693 [2023-08-24 00:07:55,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:08:40,018 INFO L124 PetriNetUnfolderBase]: 478654/661929 cut-off events. [2023-08-24 00:08:40,019 INFO L125 PetriNetUnfolderBase]: For 3947/3947 co-relation queries the response was YES. [2023-08-24 00:08:41,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274849 conditions, 661929 events. 478654/661929 cut-off events. For 3947/3947 co-relation queries the response was YES. Maximal size of possible extension queue 14875. Compared 5283028 event pairs, 277320 based on Foata normal form. 0/541722 useless extension candidates. Maximal degree in co-relation 1274835. Up to 610515 conditions per place. [2023-08-24 00:08:43,876 INFO L140 encePairwiseOnDemand]: 690/693 looper letters, 109 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2023-08-24 00:08:43,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 133 transitions, 528 flow [2023-08-24 00:08:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:08:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:08:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1041 transitions. [2023-08-24 00:08:43,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007215007215007 [2023-08-24 00:08:43,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1041 transitions. [2023-08-24 00:08:43,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1041 transitions. [2023-08-24 00:08:43,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:08:43,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1041 transitions. [2023-08-24 00:08:43,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 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 00:08:43,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 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 00:08:43,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 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 00:08:43,884 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 270 flow. Second operand 3 states and 1041 transitions. [2023-08-24 00:08:43,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 133 transitions, 528 flow [2023-08-24 00:08:43,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 133 transitions, 524 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:08:43,889 INFO L231 Difference]: Finished difference. Result has 113 places, 116 transitions, 278 flow [2023-08-24 00:08:43,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=113, PETRI_TRANSITIONS=116} [2023-08-24 00:08:43,889 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 5 predicate places. [2023-08-24 00:08:43,889 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 116 transitions, 278 flow [2023-08-24 00:08:43,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 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 00:08:43,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:08:43,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:08:43,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 00:08:44,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:08:44,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 00:08:44,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:08:44,096 INFO L85 PathProgramCache]: Analyzing trace with hash -291450702, now seen corresponding path program 1 times [2023-08-24 00:08:44,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:08:44,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017189485] [2023-08-24 00:08:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:08:44,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:08:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:08:44,127 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 00:08:44,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:08:44,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017189485] [2023-08-24 00:08:44,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017189485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:08:44,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124659294] [2023-08-24 00:08:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:08:44,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:08:44,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:08:44,129 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 00:08:44,131 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 00:08:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:08:44,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:08:44,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:08:44,226 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 00:08:44,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:08:44,235 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 00:08:44,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124659294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:08:44,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:08:44,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:08:44,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241421187] [2023-08-24 00:08:44,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:08:44,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:08:44,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:08:44,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:08:44,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:08:44,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 693 [2023-08-24 00:08:44,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 312.14285714285717) internal successors, (2185), 7 states have internal predecessors, (2185), 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 00:08:44,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:08:44,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 693 [2023-08-24 00:08:44,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:29,968 INFO L124 PetriNetUnfolderBase]: 482601/664223 cut-off events. [2023-08-24 00:09:29,980 INFO L125 PetriNetUnfolderBase]: For 13090/13090 co-relation queries the response was YES. [2023-08-24 00:09:32,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1286361 conditions, 664223 events. 482601/664223 cut-off events. For 13090/13090 co-relation queries the response was YES. Maximal size of possible extension queue 14842. Compared 5235306 event pairs, 422085 based on Foata normal form. 3/547996 useless extension candidates. Maximal degree in co-relation 1286332. Up to 610533 conditions per place. [2023-08-24 00:09:35,557 INFO L140 encePairwiseOnDemand]: 690/693 looper letters, 92 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2023-08-24 00:09:35,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 484 flow [2023-08-24 00:09:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:09:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:09:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1959 transitions. [2023-08-24 00:09:35,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47113997113997114 [2023-08-24 00:09:35,564 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1959 transitions. [2023-08-24 00:09:35,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1959 transitions. [2023-08-24 00:09:35,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:35,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1959 transitions. [2023-08-24 00:09:35,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 326.5) internal successors, (1959), 6 states have internal predecessors, (1959), 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 00:09:35,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 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 00:09:35,576 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 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 00:09:35,577 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 278 flow. Second operand 6 states and 1959 transitions. [2023-08-24 00:09:35,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 484 flow [2023-08-24 00:09:35,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:09:35,594 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 312 flow [2023-08-24 00:09:35,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2023-08-24 00:09:35,596 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 12 predicate places. [2023-08-24 00:09:35,597 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 312 flow [2023-08-24 00:09:35,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 312.14285714285717) internal successors, (2185), 7 states have internal predecessors, (2185), 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 00:09:35,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:35,598 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:09:35,606 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 00:09:35,806 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 00:09:35,806 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 00:09:35,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:35,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2067481947, now seen corresponding path program 2 times [2023-08-24 00:09:35,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:35,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38973952] [2023-08-24 00:09:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:35,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:35,872 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 00:09:35,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:35,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38973952] [2023-08-24 00:09:35,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38973952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:35,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87688825] [2023-08-24 00:09:35,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:09:35,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:35,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:35,875 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 00:09:35,878 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 00:09:36,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 00:09:36,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:09:36,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 00:09:36,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:36,181 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 00:09:36,221 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:09:36,222 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 00:09:36,242 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 00:09:36,288 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 00:09:36,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:09:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87688825] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:09:36,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:09:36,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-24 00:09:36,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231348661] [2023-08-24 00:09:36,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:09:36,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:09:36,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:36,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:09:36,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-24 00:09:36,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 693 [2023-08-24 00:09:36,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 263.6666666666667) internal successors, (1582), 6 states have internal predecessors, (1582), 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 00:09:36,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:36,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 693 [2023-08-24 00:09:36,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:10:42,476 INFO L124 PetriNetUnfolderBase]: 664587/917103 cut-off events. [2023-08-24 00:10:42,476 INFO L125 PetriNetUnfolderBase]: For 19223/19223 co-relation queries the response was YES. [2023-08-24 00:10:46,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1796079 conditions, 917103 events. 664587/917103 cut-off events. For 19223/19223 co-relation queries the response was YES. Maximal size of possible extension queue 20493. Compared 7540198 event pairs, 108431 based on Foata normal form. 0/760481 useless extension candidates. Maximal degree in co-relation 1796042. Up to 693687 conditions per place. [2023-08-24 00:10:49,531 INFO L140 encePairwiseOnDemand]: 682/693 looper letters, 272 selfloop transitions, 20 changer transitions 0/311 dead transitions. [2023-08-24 00:10:49,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 311 transitions, 1334 flow [2023-08-24 00:10:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:10:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:10:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1861 transitions. [2023-08-24 00:10:49,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44757094757094756 [2023-08-24 00:10:49,536 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1861 transitions. [2023-08-24 00:10:49,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1861 transitions. [2023-08-24 00:10:49,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:10:49,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1861 transitions. [2023-08-24 00:10:49,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 310.1666666666667) internal successors, (1861), 6 states have internal predecessors, (1861), 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 00:10:49,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 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 00:10:49,545 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 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 00:10:49,545 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 312 flow. Second operand 6 states and 1861 transitions. [2023-08-24 00:10:49,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 311 transitions, 1334 flow [2023-08-24 00:10:49,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 311 transitions, 1320 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:10:49,575 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 423 flow [2023-08-24 00:10:49,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2023-08-24 00:10:49,576 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 20 predicate places. [2023-08-24 00:10:49,576 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 423 flow [2023-08-24 00:10:49,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 263.6666666666667) internal successors, (1582), 6 states have internal predecessors, (1582), 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 00:10:49,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:10:49,577 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:10:49,584 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 00:10:49,784 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 00:10:49,785 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 00:10:49,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:10:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash -303160650, now seen corresponding path program 1 times [2023-08-24 00:10:49,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:10:49,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005679974] [2023-08-24 00:10:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:10:49,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:10:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:10:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 00:10:49,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:10:49,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005679974] [2023-08-24 00:10:49,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005679974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:10:49,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660687237] [2023-08-24 00:10:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:10:49,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:10:49,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:10:49,829 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 00:10:49,831 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 00:10:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:10:49,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:10:49,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:10:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:10:49,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:10:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:10:50,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660687237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:10:50,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:10:50,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-24 00:10:50,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695070344] [2023-08-24 00:10:50,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:10:50,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 00:10:50,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:10:50,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 00:10:50,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-24 00:10:50,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 693 [2023-08-24 00:10:50,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 423 flow. Second operand has 14 states, 14 states have (on average 304.92857142857144) internal successors, (4269), 14 states have internal predecessors, (4269), 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 00:10:50,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:10:50,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 693 [2023-08-24 00:10:50,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:11:55,985 INFO L124 PetriNetUnfolderBase]: 591054/815197 cut-off events. [2023-08-24 00:11:55,986 INFO L125 PetriNetUnfolderBase]: For 149423/149495 co-relation queries the response was YES. [2023-08-24 00:11:59,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728125 conditions, 815197 events. 591054/815197 cut-off events. For 149423/149495 co-relation queries the response was YES. Maximal size of possible extension queue 19148. Compared 6661471 event pairs, 163387 based on Foata normal form. 32/701835 useless extension candidates. Maximal degree in co-relation 1728065. Up to 766668 conditions per place. [2023-08-24 00:12:02,466 INFO L140 encePairwiseOnDemand]: 688/693 looper letters, 165 selfloop transitions, 14 changer transitions 0/201 dead transitions. [2023-08-24 00:12:02,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 201 transitions, 977 flow [2023-08-24 00:12:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 00:12:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 00:12:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4404 transitions. [2023-08-24 00:12:02,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45392702535559676 [2023-08-24 00:12:02,472 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4404 transitions. [2023-08-24 00:12:02,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4404 transitions. [2023-08-24 00:12:02,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:02,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4404 transitions. [2023-08-24 00:12:02,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 314.57142857142856) internal successors, (4404), 14 states have internal predecessors, (4404), 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 00:12:02,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 693.0) internal successors, (10395), 15 states have internal predecessors, (10395), 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 00:12:02,491 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 693.0) internal successors, (10395), 15 states have internal predecessors, (10395), 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 00:12:02,491 INFO L175 Difference]: Start difference. First operand has 128 places, 137 transitions, 423 flow. Second operand 14 states and 4404 transitions. [2023-08-24 00:12:02,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 201 transitions, 977 flow [2023-08-24 00:12:08,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 201 transitions, 977 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:12:08,194 INFO L231 Difference]: Finished difference. Result has 142 places, 144 transitions, 499 flow [2023-08-24 00:12:08,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=499, PETRI_PLACES=142, PETRI_TRANSITIONS=144} [2023-08-24 00:12:08,194 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 34 predicate places. [2023-08-24 00:12:08,194 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 144 transitions, 499 flow [2023-08-24 00:12:08,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 304.92857142857144) internal successors, (4269), 14 states have internal predecessors, (4269), 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 00:12:08,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:08,196 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:12:08,204 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 00:12:08,402 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 00:12:08,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 00:12:08,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:08,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1127658635, now seen corresponding path program 1 times [2023-08-24 00:12:08,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:08,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093810801] [2023-08-24 00:12:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:08,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-24 00:12:08,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:08,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093810801] [2023-08-24 00:12:08,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093810801] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:12:08,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96812874] [2023-08-24 00:12:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:08,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:08,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:08,784 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 00:12:08,786 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 00:12:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:08,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 00:12:08,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:12:08,910 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 00:12:08,975 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:12:08,975 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 00:12:08,997 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 00:12:09,021 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 00:12:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-24 00:12:09,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:12:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-24 00:12:19,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96812874] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:12:19,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:12:19,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-24 00:12:19,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135011273] [2023-08-24 00:12:19,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:12:19,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:12:19,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:12:19,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=111, Unknown=4, NotChecked=0, Total=156 [2023-08-24 00:12:19,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 693 [2023-08-24 00:12:19,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 144 transitions, 499 flow. Second operand has 13 states, 13 states have (on average 233.84615384615384) internal successors, (3040), 13 states have internal predecessors, (3040), 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 00:12:19,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:19,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 693 [2023-08-24 00:12:19,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:14:07,981 INFO L124 PetriNetUnfolderBase]: 1018741/1366906 cut-off events. [2023-08-24 00:14:07,981 INFO L125 PetriNetUnfolderBase]: For 252918/252918 co-relation queries the response was YES. [2023-08-24 00:14:15,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2932352 conditions, 1366906 events. 1018741/1366906 cut-off events. For 252918/252918 co-relation queries the response was YES. Maximal size of possible extension queue 26227. Compared 10681399 event pairs, 161948 based on Foata normal form. 0/1193929 useless extension candidates. Maximal degree in co-relation 2932278. Up to 920579 conditions per place. [2023-08-24 00:14:22,661 INFO L140 encePairwiseOnDemand]: 677/693 looper letters, 363 selfloop transitions, 43 changer transitions 0/419 dead transitions. [2023-08-24 00:14:22,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 419 transitions, 2042 flow [2023-08-24 00:14:22,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 00:14:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 00:14:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1993 transitions. [2023-08-24 00:14:22,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108431251288394 [2023-08-24 00:14:22,666 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1993 transitions. [2023-08-24 00:14:22,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1993 transitions. [2023-08-24 00:14:22,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:14:22,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1993 transitions. [2023-08-24 00:14:22,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 284.7142857142857) internal successors, (1993), 7 states have internal predecessors, (1993), 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 00:14:22,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 693.0) internal successors, (5544), 8 states have internal predecessors, (5544), 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 00:14:22,684 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 693.0) internal successors, (5544), 8 states have internal predecessors, (5544), 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 00:14:22,684 INFO L175 Difference]: Start difference. First operand has 142 places, 144 transitions, 499 flow. Second operand 7 states and 1993 transitions. [2023-08-24 00:14:22,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 419 transitions, 2042 flow [2023-08-24 00:14:35,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 419 transitions, 1965 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-08-24 00:14:35,691 INFO L231 Difference]: Finished difference. Result has 144 places, 169 transitions, 727 flow [2023-08-24 00:14:35,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=727, PETRI_PLACES=144, PETRI_TRANSITIONS=169} [2023-08-24 00:14:35,691 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 36 predicate places. [2023-08-24 00:14:35,691 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 169 transitions, 727 flow [2023-08-24 00:14:35,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 233.84615384615384) internal successors, (3040), 13 states have internal predecessors, (3040), 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 00:14:35,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:14:35,692 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:14:35,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 00:14:35,892 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 00:14:35,893 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 00:14:35,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:14:35,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2057536629, now seen corresponding path program 1 times [2023-08-24 00:14:35,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:14:35,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948375956] [2023-08-24 00:14:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:14:35,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:14:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:14:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-24 00:14:35,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:14:35,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948375956] [2023-08-24 00:14:35,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948375956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:14:35,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162965793] [2023-08-24 00:14:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:14:35,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:14:35,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:14:35,960 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:14:35,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 00:14:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:14:36,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 00:14:36,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:14:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-24 00:14:36,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:14:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-24 00:14:36,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162965793] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:14:36,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:14:36,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-24 00:14:36,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222625091] [2023-08-24 00:14:36,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:14:36,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 00:14:36,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:14:36,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 00:14:36,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-24 00:14:36,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 693 [2023-08-24 00:14:36,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 169 transitions, 727 flow. Second operand has 9 states, 9 states have (on average 312.8888888888889) internal successors, (2816), 9 states have internal predecessors, (2816), 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 00:14:36,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:14:36,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 693 [2023-08-24 00:14:36,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:14:45,598 INFO L124 PetriNetUnfolderBase]: 62797/93160 cut-off events. [2023-08-24 00:14:45,598 INFO L125 PetriNetUnfolderBase]: For 81882/81882 co-relation queries the response was YES. [2023-08-24 00:14:46,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251105 conditions, 93160 events. 62797/93160 cut-off events. For 81882/81882 co-relation queries the response was YES. Maximal size of possible extension queue 2478. Compared 708728 event pairs, 1477 based on Foata normal form. 7580/93525 useless extension candidates. Maximal degree in co-relation 241080. Up to 58758 conditions per place. [2023-08-24 00:14:46,493 INFO L140 encePairwiseOnDemand]: 690/693 looper letters, 212 selfloop transitions, 4 changer transitions 0/229 dead transitions. [2023-08-24 00:14:46,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 229 transitions, 1319 flow [2023-08-24 00:14:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:14:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:14:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2022 transitions. [2023-08-24 00:14:46,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4862914862914863 [2023-08-24 00:14:46,498 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2022 transitions. [2023-08-24 00:14:46,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2022 transitions. [2023-08-24 00:14:46,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:14:46,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2022 transitions. [2023-08-24 00:14:46,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 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 00:14:46,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 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 00:14:46,506 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 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 00:14:46,506 INFO L175 Difference]: Start difference. First operand has 144 places, 169 transitions, 727 flow. Second operand 6 states and 2022 transitions. [2023-08-24 00:14:46,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 229 transitions, 1319 flow [2023-08-24 00:14:46,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 229 transitions, 1267 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-24 00:14:46,774 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 366 flow [2023-08-24 00:14:46,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2023-08-24 00:14:46,775 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -5 predicate places. [2023-08-24 00:14:46,776 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 366 flow [2023-08-24 00:14:46,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 312.8888888888889) internal successors, (2816), 9 states have internal predecessors, (2816), 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 00:14:46,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:14:46,777 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 00:14:46,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 00:14:46,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 00:14:46,986 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 00:14:46,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:14:46,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2078219308, now seen corresponding path program 1 times [2023-08-24 00:14:46,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:14:46,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288112377] [2023-08-24 00:14:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:14:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:14:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:14:47,044 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:14:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:14:47,093 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:14:47,094 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:14:47,094 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-24 00:14:47,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-24 00:14:47,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-24 00:14:47,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-24 00:14:47,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-24 00:14:47,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-24 00:14:47,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-24 00:14:47,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 00:14:47,095 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-08-24 00:14:47,096 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:14:47,096 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 00:14:47,170 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 00:14:47,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 381 places, 462 transitions, 968 flow [2023-08-24 00:14:47,438 INFO L124 PetriNetUnfolderBase]: 230/1219 cut-off events. [2023-08-24 00:14:47,438 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:14:47,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1219 events. 230/1219 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 6837 event pairs, 6 based on Foata normal form. 0/975 useless extension candidates. Maximal degree in co-relation 905. Up to 32 conditions per place. [2023-08-24 00:14:47,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 381 places, 462 transitions, 968 flow [2023-08-24 00:14:47,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 381 places, 462 transitions, 968 flow [2023-08-24 00:14:47,495 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:14:47,495 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 381 places, 462 transitions, 968 flow [2023-08-24 00:14:47,495 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 381 places, 462 transitions, 968 flow [2023-08-24 00:14:47,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 381 places, 462 transitions, 968 flow [2023-08-24 00:14:47,837 INFO L124 PetriNetUnfolderBase]: 230/1219 cut-off events. [2023-08-24 00:14:47,838 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:14:47,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1219 events. 230/1219 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 6837 event pairs, 6 based on Foata normal form. 0/975 useless extension candidates. Maximal degree in co-relation 905. Up to 32 conditions per place. [2023-08-24 00:14:47,929 INFO L119 LiptonReduction]: Number of co-enabled transitions 140760 [2023-08-24 00:14:52,596 INFO L134 LiptonReduction]: Checked pairs total: 248283 [2023-08-24 00:14:52,596 INFO L136 LiptonReduction]: Total number of compositions: 349 [2023-08-24 00:14:52,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:14:52,615 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;@333c66fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:14:52,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-24 00:14:52,617 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:14:52,617 INFO L124 PetriNetUnfolderBase]: 9/40 cut-off events. [2023-08-24 00:14:52,617 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 00:14:52,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:14:52,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:14:52,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-24 00:14:52,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:14:52,618 INFO L85 PathProgramCache]: Analyzing trace with hash 105119412, now seen corresponding path program 1 times [2023-08-24 00:14:52,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:14:52,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108211686] [2023-08-24 00:14:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:14:52,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:14:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:14:52,663 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 00:14:52,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:14:52,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108211686] [2023-08-24 00:14:52,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108211686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:14:52,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:14:52,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:14:52,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221026093] [2023-08-24 00:14:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:14:52,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:14:52,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:14:52,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:14:52,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:14:52,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 811 [2023-08-24 00:14:52,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 198 transitions, 440 flow. Second operand has 3 states, 3 states have (on average 368.0) internal successors, (1104), 3 states have internal predecessors, (1104), 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 00:14:52,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:14:52,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 811 [2023-08-24 00:14:52,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand