/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_76-tricky_address3_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:09:05,609 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:09:05,707 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 00:09:05,713 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:09:05,714 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:09:05,749 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:09:05,750 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:09:05,750 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:09:05,751 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:09:05,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:09:05,755 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:09:05,755 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:09:05,755 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:09:05,757 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:09:05,757 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:09:05,757 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:09:05,757 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:09:05,757 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:09:05,758 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:09:05,758 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:09:05,758 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:09:05,759 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:09:05,759 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:09:05,760 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:09:05,760 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:09:05,760 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:09:05,760 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:09:05,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:09:05,761 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:09:05,761 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:09:05,762 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:09:05,762 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:09:05,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:09:05,762 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:09:05,763 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:09:05,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:09:06,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:09:06,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:09:06,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:09:06,095 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:09:06,095 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:09:06,097 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-08-24 00:09:07,225 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:09:07,511 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:09:07,512 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-08-24 00:09:07,530 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c84a7205/19ef044772f04e8f98792ccebf9f4c9d/FLAGef38373bd [2023-08-24 00:09:07,543 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c84a7205/19ef044772f04e8f98792ccebf9f4c9d [2023-08-24 00:09:07,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:09:07,547 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:09:07,548 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:09:07,548 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:09:07,551 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:09:07,551 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:09:07" (1/1) ... [2023-08-24 00:09:07,552 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bfc67fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:07, skipping insertion in model container [2023-08-24 00:09:07,552 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:09:07" (1/1) ... [2023-08-24 00:09:07,591 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:09:08,036 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_76-tricky_address3_racefree.i[41323,41336] [2023-08-24 00:09:08,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:09:08,095 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:09:08,126 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:09:08,127 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:09:08,133 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-24 00:09:08,146 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_76-tricky_address3_racefree.i[41323,41336] [2023-08-24 00:09:08,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:09:08,221 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:09:08,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08 WrapperNode [2023-08-24 00:09:08,222 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:09:08,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:09:08,223 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:09:08,223 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:09:08,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (1/1) ... [2023-08-24 00:09:08,257 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (1/1) ... [2023-08-24 00:09:08,282 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 196 [2023-08-24 00:09:08,283 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:09:08,283 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:09:08,284 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:09:08,284 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:09:08,292 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (1/1) ... [2023-08-24 00:09:08,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (1/1) ... [2023-08-24 00:09:08,295 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (1/1) ... [2023-08-24 00:09:08,296 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (1/1) ... [2023-08-24 00:09:08,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (1/1) ... [2023-08-24 00:09:08,309 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (1/1) ... [2023-08-24 00:09:08,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (1/1) ... [2023-08-24 00:09:08,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (1/1) ... [2023-08-24 00:09:08,316 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:09:08,317 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:09:08,317 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:09:08,317 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:09:08,318 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (1/1) ... [2023-08-24 00:09:08,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:09:08,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:08,351 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 00:09:08,372 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 00:09:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:09:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:09:08,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:09:08,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:09:08,390 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:09:08,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:09:08,391 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 00:09:08,391 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 00:09:08,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:09:08,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:09:08,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:09:08,393 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 00:09:08,581 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:09:08,584 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:09:09,027 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:09:09,036 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:09:09,037 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-24 00:09:09,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:09:09 BoogieIcfgContainer [2023-08-24 00:09:09,039 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:09:09,042 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:09:09,042 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:09:09,045 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:09:09,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:09:07" (1/3) ... [2023-08-24 00:09:09,046 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283cbf57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:09:09, skipping insertion in model container [2023-08-24 00:09:09,046 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:09:08" (2/3) ... [2023-08-24 00:09:09,047 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283cbf57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:09:09, skipping insertion in model container [2023-08-24 00:09:09,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:09:09" (3/3) ... [2023-08-24 00:09:09,048 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2023-08-24 00:09:09,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:09:09,065 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 00:09:09,065 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:09:09,142 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 00:09:09,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 400 flow [2023-08-24 00:09:09,293 INFO L124 PetriNetUnfolderBase]: 45/268 cut-off events. [2023-08-24 00:09:09,294 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-24 00:09:09,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 268 events. 45/268 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 837 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-08-24 00:09:09,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 196 transitions, 400 flow [2023-08-24 00:09:09,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 191 transitions, 387 flow [2023-08-24 00:09:09,310 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:09:09,318 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 191 transitions, 387 flow [2023-08-24 00:09:09,321 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 191 transitions, 387 flow [2023-08-24 00:09:09,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 191 transitions, 387 flow [2023-08-24 00:09:09,359 INFO L124 PetriNetUnfolderBase]: 44/263 cut-off events. [2023-08-24 00:09:09,360 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:09:09,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 263 events. 44/263 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 800 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-08-24 00:09:09,369 INFO L119 LiptonReduction]: Number of co-enabled transitions 11076 [2023-08-24 00:09:12,282 INFO L134 LiptonReduction]: Checked pairs total: 18087 [2023-08-24 00:09:12,282 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-24 00:09:12,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:09:12,299 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;@428773b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:09:12,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 00:09:12,304 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:09:12,304 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2023-08-24 00:09:12,304 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:09:12,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:12,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:09:12,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:09:12,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:12,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1630590956, now seen corresponding path program 1 times [2023-08-24 00:09:12,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:12,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932968221] [2023-08-24 00:09:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:12,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:12,549 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 00:09:12,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:12,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932968221] [2023-08-24 00:09:12,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932968221] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:09:12,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:09:12,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:09:12,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128042056] [2023-08-24 00:09:12,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:09:12,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:09:12,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:09:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:09:12,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 00:09:12,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:12,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:12,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 00:09:12,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:12,715 INFO L124 PetriNetUnfolderBase]: 272/611 cut-off events. [2023-08-24 00:09:12,715 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:09:12,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 611 events. 272/611 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3026 event pairs, 238 based on Foata normal form. 118/638 useless extension candidates. Maximal degree in co-relation 1092. Up to 528 conditions per place. [2023-08-24 00:09:12,721 INFO L140 encePairwiseOnDemand]: 339/364 looper letters, 34 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-24 00:09:12,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-08-24 00:09:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:09:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:09:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2023-08-24 00:09:12,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48534798534798534 [2023-08-24 00:09:12,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2023-08-24 00:09:12,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2023-08-24 00:09:12,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:12,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2023-08-24 00:09:12,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:12,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:12,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:12,754 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 530 transitions. [2023-08-24 00:09:12,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-08-24 00:09:12,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:09:12,758 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 105 flow [2023-08-24 00:09:12,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-24 00:09:12,763 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-24 00:09:12,763 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 105 flow [2023-08-24 00:09:12,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:12,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:12,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:09:12,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:09:12,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:09:12,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:12,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1557690004, now seen corresponding path program 1 times [2023-08-24 00:09:12,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:12,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756792468] [2023-08-24 00:09:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:12,833 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 00:09:12,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756792468] [2023-08-24 00:09:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756792468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513721872] [2023-08-24 00:09:12,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:12,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:12,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:12,837 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 00:09:12,861 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 00:09:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:12,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-24 00:09:12,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:12,956 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 00:09:12,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:09:12,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513721872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:09:12,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:09:12,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 00:09:12,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374423052] [2023-08-24 00:09:12,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:09:12,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:09:12,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:09:12,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:09:12,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 00:09:12,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:12,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:12,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 00:09:12,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:13,071 INFO L124 PetriNetUnfolderBase]: 255/592 cut-off events. [2023-08-24 00:09:13,072 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:09:13,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 592 events. 255/592 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3329 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 1120. Up to 497 conditions per place. [2023-08-24 00:09:13,076 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 49 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-24 00:09:13,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 237 flow [2023-08-24 00:09:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:09:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:09:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-24 00:09:13,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2023-08-24 00:09:13,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-24 00:09:13,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-24 00:09:13,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:13,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-24 00:09:13,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:13,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:13,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:13,085 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 105 flow. Second operand 3 states and 522 transitions. [2023-08-24 00:09:13,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 237 flow [2023-08-24 00:09:13,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 233 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:09:13,088 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 109 flow [2023-08-24 00:09:13,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-24 00:09:13,089 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-08-24 00:09:13,089 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 109 flow [2023-08-24 00:09:13,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:13,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:13,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-24 00:09:13,100 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 00:09:13,300 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 00:09:13,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:09:13,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:13,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1047843948, now seen corresponding path program 1 times [2023-08-24 00:09:13,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:13,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726004069] [2023-08-24 00:09:13,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:13,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:13,401 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 00:09:13,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:13,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726004069] [2023-08-24 00:09:13,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726004069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:13,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96792792] [2023-08-24 00:09:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:13,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:13,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:13,405 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 00:09:13,430 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 00:09:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:13,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:09:13,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:13,508 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 00:09:13,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:09:13,541 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 00:09:13,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96792792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:09:13,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:09:13,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 00:09:13,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924785626] [2023-08-24 00:09:13,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:09:13,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:09:13,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:13,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:09:13,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 00:09:13,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 00:09:13,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 158.5) internal successors, (951), 6 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:13,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:13,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 00:09:13,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:13,679 INFO L124 PetriNetUnfolderBase]: 270/596 cut-off events. [2023-08-24 00:09:13,679 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-08-24 00:09:13,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 596 events. 270/596 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2934 event pairs, 238 based on Foata normal form. 3/527 useless extension candidates. Maximal degree in co-relation 1147. Up to 513 conditions per place. [2023-08-24 00:09:13,682 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 34 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-08-24 00:09:13,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 199 flow [2023-08-24 00:09:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:09:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:09:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 984 transitions. [2023-08-24 00:09:13,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2023-08-24 00:09:13,686 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 984 transitions. [2023-08-24 00:09:13,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 984 transitions. [2023-08-24 00:09:13,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:13,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 984 transitions. [2023-08-24 00:09:13,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:13,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 364.0) internal successors, (2548), 7 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:13,695 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 364.0) internal successors, (2548), 7 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:13,696 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 109 flow. Second operand 6 states and 984 transitions. [2023-08-24 00:09:13,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 199 flow [2023-08-24 00:09:13,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 00:09:13,699 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 141 flow [2023-08-24 00:09:13,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-24 00:09:13,701 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-08-24 00:09:13,701 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 141 flow [2023-08-24 00:09:13,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.5) internal successors, (951), 6 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:13,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:13,702 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-24 00:09:13,712 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 00:09:13,908 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 00:09:13,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:09:13,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:13,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1076409068, now seen corresponding path program 2 times [2023-08-24 00:09:13,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:13,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635936663] [2023-08-24 00:09:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:13,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:14,046 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 00:09:14,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:14,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635936663] [2023-08-24 00:09:14,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635936663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:14,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6708439] [2023-08-24 00:09:14,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:09:14,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:14,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:14,049 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 00:09:14,073 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 00:09:14,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:09:14,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:09:14,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:09:14,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:14,156 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 00:09:14,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:09:14,206 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 00:09:14,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6708439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:09:14,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:09:14,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 00:09:14,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890819038] [2023-08-24 00:09:14,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:09:14,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:09:14,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:09:14,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 00:09:14,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 364 [2023-08-24 00:09:14,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 141 flow. Second operand has 13 states, 13 states have (on average 158.30769230769232) internal successors, (2058), 13 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:14,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:14,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 364 [2023-08-24 00:09:14,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:14,335 INFO L124 PetriNetUnfolderBase]: 271/605 cut-off events. [2023-08-24 00:09:14,336 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-08-24 00:09:14,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 605 events. 271/605 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2944 event pairs, 238 based on Foata normal form. 6/538 useless extension candidates. Maximal degree in co-relation 1140. Up to 513 conditions per place. [2023-08-24 00:09:14,339 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 34 selfloop transitions, 11 changer transitions 0/54 dead transitions. [2023-08-24 00:09:14,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 267 flow [2023-08-24 00:09:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:09:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:09:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1935 transitions. [2023-08-24 00:09:14,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429945054945055 [2023-08-24 00:09:14,345 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1935 transitions. [2023-08-24 00:09:14,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1935 transitions. [2023-08-24 00:09:14,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:14,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1935 transitions. [2023-08-24 00:09:14,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 161.25) internal successors, (1935), 12 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:14,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 364.0) internal successors, (4732), 13 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:14,359 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 364.0) internal successors, (4732), 13 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:14,359 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 141 flow. Second operand 12 states and 1935 transitions. [2023-08-24 00:09:14,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 267 flow [2023-08-24 00:09:14,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 253 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:09:14,362 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 211 flow [2023-08-24 00:09:14,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=211, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2023-08-24 00:09:14,363 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2023-08-24 00:09:14,363 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 211 flow [2023-08-24 00:09:14,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 158.30769230769232) internal successors, (2058), 13 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:14,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:14,365 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-24 00:09:14,374 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 00:09:14,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:14,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:09:14,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:14,572 INFO L85 PathProgramCache]: Analyzing trace with hash -749552364, now seen corresponding path program 3 times [2023-08-24 00:09:14,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:14,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759395567] [2023-08-24 00:09:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:14,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:09:14,607 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:09:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:09:14,657 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:09:14,657 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:09:14,659 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-24 00:09:14,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-24 00:09:14,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-24 00:09:14,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-24 00:09:14,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 00:09:14,661 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-24 00:09:14,671 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:09:14,671 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:09:14,713 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 00:09:14,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 00:09:14,759 INFO L124 PetriNetUnfolderBase]: 75/438 cut-off events. [2023-08-24 00:09:14,760 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 00:09:14,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1742 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 270. Up to 12 conditions per place. [2023-08-24 00:09:14,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 00:09:14,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 269 transitions, 556 flow [2023-08-24 00:09:14,768 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:09:14,769 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 269 transitions, 556 flow [2023-08-24 00:09:14,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 269 transitions, 556 flow [2023-08-24 00:09:14,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2023-08-24 00:09:14,813 INFO L124 PetriNetUnfolderBase]: 75/438 cut-off events. [2023-08-24 00:09:14,813 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 00:09:14,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1742 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 270. Up to 12 conditions per place. [2023-08-24 00:09:14,837 INFO L119 LiptonReduction]: Number of co-enabled transitions 33796 [2023-08-24 00:09:18,138 INFO L134 LiptonReduction]: Checked pairs total: 58541 [2023-08-24 00:09:18,139 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-08-24 00:09:18,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:09:18,146 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;@428773b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:09:18,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 00:09:18,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:09:18,152 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-08-24 00:09:18,152 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:09:18,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:18,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:09:18,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:09:18,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:18,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1273183684, now seen corresponding path program 1 times [2023-08-24 00:09:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:18,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681056286] [2023-08-24 00:09:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:18,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:18,195 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 00:09:18,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:18,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681056286] [2023-08-24 00:09:18,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681056286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:09:18,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:09:18,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:09:18,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25334861] [2023-08-24 00:09:18,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:09:18,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:09:18,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:18,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:09:18,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:09:18,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 00:09:18,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:18,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:18,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 00:09:18,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:19,610 INFO L124 PetriNetUnfolderBase]: 10521/16515 cut-off events. [2023-08-24 00:09:19,610 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-24 00:09:19,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32050 conditions, 16515 events. 10521/16515 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 109632 event pairs, 9818 based on Foata normal form. 2499/16448 useless extension candidates. Maximal degree in co-relation 13969. Up to 15431 conditions per place. [2023-08-24 00:09:19,702 INFO L140 encePairwiseOnDemand]: 461/495 looper letters, 56 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-24 00:09:19,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-08-24 00:09:19,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:09:19,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:09:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-08-24 00:09:19,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2023-08-24 00:09:19,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-08-24 00:09:19,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-08-24 00:09:19,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:19,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-08-24 00:09:19,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:19,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:19,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:19,712 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 735 transitions. [2023-08-24 00:09:19,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-08-24 00:09:19,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:09:19,716 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2023-08-24 00:09:19,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-08-24 00:09:19,719 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-24 00:09:19,719 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2023-08-24 00:09:19,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:19,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:19,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:09:19,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 00:09:19,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:09:19,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:19,720 INFO L85 PathProgramCache]: Analyzing trace with hash 133886316, now seen corresponding path program 1 times [2023-08-24 00:09:19,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:19,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316370730] [2023-08-24 00:09:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:19,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:19,758 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 00:09:19,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:19,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316370730] [2023-08-24 00:09:19,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316370730] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:19,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758891234] [2023-08-24 00:09:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:19,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:19,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:19,767 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 00:09:19,773 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 00:09:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:19,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-24 00:09:19,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:19,843 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 00:09:19,843 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:09:19,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758891234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:09:19,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:09:19,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 00:09:19,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640374859] [2023-08-24 00:09:19,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:09:19,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:09:19,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:19,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:09:19,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:09:19,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 00:09:19,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:19,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:19,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 00:09:19,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:21,204 INFO L124 PetriNetUnfolderBase]: 10399/16491 cut-off events. [2023-08-24 00:09:21,204 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2023-08-24 00:09:21,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32041 conditions, 16491 events. 10399/16491 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 111677 event pairs, 4650 based on Foata normal form. 0/13963 useless extension candidates. Maximal degree in co-relation 32028. Up to 15399 conditions per place. [2023-08-24 00:09:21,306 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 74 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-24 00:09:21,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 356 flow [2023-08-24 00:09:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:09:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:09:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2023-08-24 00:09:21,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855218855218855 [2023-08-24 00:09:21,309 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2023-08-24 00:09:21,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2023-08-24 00:09:21,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:21,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2023-08-24 00:09:21,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:21,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:21,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:21,314 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 721 transitions. [2023-08-24 00:09:21,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 356 flow [2023-08-24 00:09:21,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 352 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:09:21,320 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2023-08-24 00:09:21,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-08-24 00:09:21,321 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-08-24 00:09:21,321 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2023-08-24 00:09:21,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:21,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:21,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:09:21,331 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 00:09:21,527 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 00:09:21,528 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:09:21,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:21,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1188956653, now seen corresponding path program 1 times [2023-08-24 00:09:21,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:21,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745405020] [2023-08-24 00:09:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:21,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:21,578 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 00:09:21,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745405020] [2023-08-24 00:09:21,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745405020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643011161] [2023-08-24 00:09:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:21,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:21,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:21,580 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 00:09:21,583 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 00:09:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:21,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:09:21,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:21,674 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 00:09:21,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:09:21,690 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 00:09:21,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643011161] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:09:21,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:09:21,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:09:21,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840621258] [2023-08-24 00:09:21,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:09:21,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:09:21,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:09:21,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:09:21,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 00:09:21,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:21,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:21,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 00:09:21,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:22,928 INFO L124 PetriNetUnfolderBase]: 10623/16504 cut-off events. [2023-08-24 00:09:22,928 INFO L125 PetriNetUnfolderBase]: For 685/685 co-relation queries the response was YES. [2023-08-24 00:09:22,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32633 conditions, 16504 events. 10623/16504 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 107946 event pairs, 9818 based on Foata normal form. 3/14244 useless extension candidates. Maximal degree in co-relation 32605. Up to 15417 conditions per place. [2023-08-24 00:09:23,021 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 57 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-24 00:09:23,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 312 flow [2023-08-24 00:09:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:09:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:09:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1354 transitions. [2023-08-24 00:09:23,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558922558922559 [2023-08-24 00:09:23,026 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1354 transitions. [2023-08-24 00:09:23,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1354 transitions. [2023-08-24 00:09:23,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:23,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1354 transitions. [2023-08-24 00:09:23,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 225.66666666666666) internal successors, (1354), 6 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:23,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:23,034 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:23,034 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1354 transitions. [2023-08-24 00:09:23,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 312 flow [2023-08-24 00:09:23,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:09:23,040 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2023-08-24 00:09:23,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-08-24 00:09:23,041 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-08-24 00:09:23,041 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2023-08-24 00:09:23,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:23,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:23,042 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:09:23,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 00:09:23,251 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 00:09:23,251 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:09:23,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash -871778709, now seen corresponding path program 2 times [2023-08-24 00:09:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:23,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977285870] [2023-08-24 00:09:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:23,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:23,381 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 00:09:23,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:23,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977285870] [2023-08-24 00:09:23,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977285870] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:23,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20379726] [2023-08-24 00:09:23,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:09:23,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:23,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:23,385 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 00:09:23,386 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 00:09:23,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 00:09:23,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:09:23,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 00:09:23,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:23,519 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 00:09:23,574 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:09:23,575 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 00:09:23,599 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 00:09:23,645 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 00:09:23,646 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:09:23,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20379726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:09:23,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:09:23,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-24 00:09:23,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617947200] [2023-08-24 00:09:23,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:09:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:09:23,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:09:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-24 00:09:23,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 495 [2023-08-24 00:09:23,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 182.5) internal successors, (1095), 6 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states 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 00:09:23,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:23,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 495 [2023-08-24 00:09:23,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:25,156 INFO L124 PetriNetUnfolderBase]: 11604/18274 cut-off events. [2023-08-24 00:09:25,156 INFO L125 PetriNetUnfolderBase]: For 705/705 co-relation queries the response was YES. [2023-08-24 00:09:25,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36486 conditions, 18274 events. 11604/18274 cut-off events. For 705/705 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 124914 event pairs, 2806 based on Foata normal form. 0/16017 useless extension candidates. Maximal degree in co-relation 36450. Up to 13570 conditions per place. [2023-08-24 00:09:25,274 INFO L140 encePairwiseOnDemand]: 486/495 looper letters, 135 selfloop transitions, 14 changer transitions 9/169 dead transitions. [2023-08-24 00:09:25,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 169 transitions, 747 flow [2023-08-24 00:09:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:09:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:09:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1241 transitions. [2023-08-24 00:09:25,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41784511784511785 [2023-08-24 00:09:25,278 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1241 transitions. [2023-08-24 00:09:25,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1241 transitions. [2023-08-24 00:09:25,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:25,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1241 transitions. [2023-08-24 00:09:25,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states 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 00:09:25,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:25,286 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:25,286 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 6 states and 1241 transitions. [2023-08-24 00:09:25,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 169 transitions, 747 flow [2023-08-24 00:09:25,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 169 transitions, 733 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:09:25,290 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 280 flow [2023-08-24 00:09:25,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-08-24 00:09:25,291 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-08-24 00:09:25,291 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 280 flow [2023-08-24 00:09:25,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.5) internal successors, (1095), 6 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states 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 00:09:25,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:25,292 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 00:09:25,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 00:09:25,497 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 00:09:25,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:09:25,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:25,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1965936650, now seen corresponding path program 1 times [2023-08-24 00:09:25,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:25,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884819816] [2023-08-24 00:09:25,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:25,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 00:09:25,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:25,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884819816] [2023-08-24 00:09:25,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884819816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:25,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876863136] [2023-08-24 00:09:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:25,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:25,584 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 00:09:25,587 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 00:09:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:25,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:09:25,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 00:09:25,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:09:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 00:09:25,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876863136] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:09:25,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:09:25,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 00:09:25,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66184047] [2023-08-24 00:09:25,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:09:25,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:09:25,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:25,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:09:25,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 00:09:25,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 495 [2023-08-24 00:09:25,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 280 flow. Second operand has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:25,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:25,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 495 [2023-08-24 00:09:25,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:27,047 INFO L124 PetriNetUnfolderBase]: 11040/17549 cut-off events. [2023-08-24 00:09:27,048 INFO L125 PetriNetUnfolderBase]: For 3592/3592 co-relation queries the response was YES. [2023-08-24 00:09:27,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38156 conditions, 17549 events. 11040/17549 cut-off events. For 3592/3592 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 120396 event pairs, 9757 based on Foata normal form. 6/16133 useless extension candidates. Maximal degree in co-relation 38098. Up to 16622 conditions per place. [2023-08-24 00:09:27,155 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 69 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-08-24 00:09:27,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 92 transitions, 476 flow [2023-08-24 00:09:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:09:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:09:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2653 transitions. [2023-08-24 00:09:27,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44663299663299666 [2023-08-24 00:09:27,163 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2653 transitions. [2023-08-24 00:09:27,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2653 transitions. [2023-08-24 00:09:27,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:27,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2653 transitions. [2023-08-24 00:09:27,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 221.08333333333334) internal successors, (2653), 12 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:27,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:27,181 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:27,181 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 280 flow. Second operand 12 states and 2653 transitions. [2023-08-24 00:09:27,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 92 transitions, 476 flow [2023-08-24 00:09:27,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:09:27,188 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 364 flow [2023-08-24 00:09:27,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=364, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2023-08-24 00:09:27,189 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2023-08-24 00:09:27,189 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 364 flow [2023-08-24 00:09:27,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:27,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:27,203 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 00:09:27,213 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 00:09:27,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:27,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:09:27,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash -901075190, now seen corresponding path program 2 times [2023-08-24 00:09:27,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:27,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006725863] [2023-08-24 00:09:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:27,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:09:27,438 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:09:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:09:27,479 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:09:27,480 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:09:27,480 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-24 00:09:27,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-24 00:09:27,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-24 00:09:27,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-24 00:09:27,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-24 00:09:27,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 00:09:27,481 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-08-24 00:09:27,482 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:09:27,482 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:09:27,520 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 00:09:27,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 00:09:27,608 INFO L124 PetriNetUnfolderBase]: 110/641 cut-off events. [2023-08-24 00:09:27,608 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 00:09:27,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 641 events. 110/641 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2834 event pairs, 1 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2023-08-24 00:09:27,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 00:09:27,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 342 transitions, 714 flow [2023-08-24 00:09:27,627 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:09:27,627 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 342 transitions, 714 flow [2023-08-24 00:09:27,628 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 342 transitions, 714 flow [2023-08-24 00:09:27,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 342 transitions, 714 flow [2023-08-24 00:09:27,714 INFO L124 PetriNetUnfolderBase]: 110/641 cut-off events. [2023-08-24 00:09:27,715 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 00:09:27,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 641 events. 110/641 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2834 event pairs, 1 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2023-08-24 00:09:27,756 INFO L119 LiptonReduction]: Number of co-enabled transitions 66456 [2023-08-24 00:09:31,763 INFO L134 LiptonReduction]: Checked pairs total: 111148 [2023-08-24 00:09:31,763 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-08-24 00:09:31,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:09:31,765 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;@428773b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:09:31,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 00:09:31,768 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:09:31,768 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-08-24 00:09:31,768 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:09:31,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:31,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:09:31,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:09:31,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash 323289153, now seen corresponding path program 1 times [2023-08-24 00:09:31,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:31,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798036139] [2023-08-24 00:09:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:31,795 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 00:09:31,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:31,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798036139] [2023-08-24 00:09:31,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798036139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:09:31,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:09:31,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:09:31,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622922299] [2023-08-24 00:09:31,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:09:31,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:09:31,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:09:31,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:09:31,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 00:09:31,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:31,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:31,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 00:09:31,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:50,407 INFO L124 PetriNetUnfolderBase]: 199024/283218 cut-off events. [2023-08-24 00:09:50,407 INFO L125 PetriNetUnfolderBase]: For 3132/3132 co-relation queries the response was YES. [2023-08-24 00:09:50,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544637 conditions, 283218 events. 199024/283218 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 7667. Compared 2271080 event pairs, 188343 based on Foata normal form. 51886/290674 useless extension candidates. Maximal degree in co-relation 50654. Up to 259483 conditions per place. [2023-08-24 00:09:52,133 INFO L140 encePairwiseOnDemand]: 576/621 looper letters, 69 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-24 00:09:52,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 352 flow [2023-08-24 00:09:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:09:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:09:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 933 transitions. [2023-08-24 00:09:52,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500805152979066 [2023-08-24 00:09:52,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 933 transitions. [2023-08-24 00:09:52,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 933 transitions. [2023-08-24 00:09:52,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:52,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 933 transitions. [2023-08-24 00:09:52,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:52,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 621.0) internal successors, (2484), 4 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:52,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 621.0) internal successors, (2484), 4 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:52,141 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 933 transitions. [2023-08-24 00:09:52,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 352 flow [2023-08-24 00:09:52,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:09:52,145 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 220 flow [2023-08-24 00:09:52,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2023-08-24 00:09:52,146 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-08-24 00:09:52,146 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 220 flow [2023-08-24 00:09:52,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:52,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:52,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:09:52,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 00:09:52,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:09:52,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:52,147 INFO L85 PathProgramCache]: Analyzing trace with hash 559044108, now seen corresponding path program 1 times [2023-08-24 00:09:52,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:52,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754929812] [2023-08-24 00:09:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:52,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:52,178 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 00:09:52,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:52,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754929812] [2023-08-24 00:09:52,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754929812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:52,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458701441] [2023-08-24 00:09:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:52,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:52,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:52,181 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 00:09:52,188 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 00:09:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:52,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-24 00:09:52,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:52,277 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 00:09:52,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:09:52,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458701441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:09:52,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:09:52,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 00:09:52,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116185921] [2023-08-24 00:09:52,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:09:52,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:09:52,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:09:52,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:09:52,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 00:09:52,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:09:52,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:52,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 00:09:52,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:10:09,257 INFO L124 PetriNetUnfolderBase]: 199267/282410 cut-off events. [2023-08-24 00:10:09,257 INFO L125 PetriNetUnfolderBase]: For 3094/3094 co-relation queries the response was YES. [2023-08-24 00:10:09,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543876 conditions, 282410 events. 199267/282410 cut-off events. For 3094/3094 co-relation queries the response was YES. Maximal size of possible extension queue 7610. Compared 2244601 event pairs, 123187 based on Foata normal form. 0/238132 useless extension candidates. Maximal degree in co-relation 543862. Up to 259453 conditions per place. [2023-08-24 00:10:10,913 INFO L140 encePairwiseOnDemand]: 618/621 looper letters, 85 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-24 00:10:10,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 426 flow [2023-08-24 00:10:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:10:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:10:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-24 00:10:10,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863123993558776 [2023-08-24 00:10:10,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-24 00:10:10,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-24 00:10:10,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:10:10,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-24 00:10:10,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:10:10,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 621.0) internal successors, (2484), 4 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:10:10,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 621.0) internal successors, (2484), 4 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:10:10,921 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 220 flow. Second operand 3 states and 906 transitions. [2023-08-24 00:10:10,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 426 flow [2023-08-24 00:10:10,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 106 transitions, 422 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:10:10,924 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 228 flow [2023-08-24 00:10:10,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2023-08-24 00:10:10,924 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-08-24 00:10:10,924 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 228 flow [2023-08-24 00:10:10,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:10:10,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:10:10,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:10:10,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-24 00:10:11,129 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 00:10:11,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:10:11,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:10:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash 162791803, now seen corresponding path program 1 times [2023-08-24 00:10:11,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:10:11,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089078819] [2023-08-24 00:10:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:10:11,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:10:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:10:11,170 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 00:10:11,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:10:11,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089078819] [2023-08-24 00:10:11,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089078819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:10:11,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829162995] [2023-08-24 00:10:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:10:11,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:10:11,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:10:11,172 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 00:10:11,177 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 00:10:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:10:11,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:10:11,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:10:11,282 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 00:10:11,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:10:11,295 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 00:10:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829162995] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:10:11,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:10:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:10:11,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496266647] [2023-08-24 00:10:11,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:10:11,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:10:11,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:10:11,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:10:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:10:11,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 00:10:11,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:10:11,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:10:11,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 00:10:11,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:10:29,214 INFO L124 PetriNetUnfolderBase]: 200915/283582 cut-off events. [2023-08-24 00:10:29,215 INFO L125 PetriNetUnfolderBase]: For 10256/10256 co-relation queries the response was YES. [2023-08-24 00:10:30,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552245 conditions, 283582 events. 200915/283582 cut-off events. For 10256/10256 co-relation queries the response was YES. Maximal size of possible extension queue 7564. Compared 2229964 event pairs, 188343 based on Foata normal form. 3/242695 useless extension candidates. Maximal degree in co-relation 552216. Up to 259469 conditions per place. [2023-08-24 00:10:31,092 INFO L140 encePairwiseOnDemand]: 618/621 looper letters, 70 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-08-24 00:10:31,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 390 flow [2023-08-24 00:10:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:10:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:10:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1715 transitions. [2023-08-24 00:10:31,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46027911969940954 [2023-08-24 00:10:31,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1715 transitions. [2023-08-24 00:10:31,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1715 transitions. [2023-08-24 00:10:31,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:10:31,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1715 transitions. [2023-08-24 00:10:31,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.8333333333333) internal successors, (1715), 6 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:10:31,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 621.0) internal successors, (4347), 7 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:10:31,101 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 621.0) internal successors, (4347), 7 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:10:31,102 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 228 flow. Second operand 6 states and 1715 transitions. [2023-08-24 00:10:31,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 390 flow [2023-08-24 00:10:31,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:10:31,111 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 262 flow [2023-08-24 00:10:31,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2023-08-24 00:10:31,112 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2023-08-24 00:10:31,112 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 262 flow [2023-08-24 00:10:31,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:10:31,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:10:31,113 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:10:31,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 00:10:31,317 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 00:10:31,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:10:31,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:10:31,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1551228208, now seen corresponding path program 2 times [2023-08-24 00:10:31,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:10:31,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115120819] [2023-08-24 00:10:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:10:31,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:10:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:10:31,387 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 00:10:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:10:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115120819] [2023-08-24 00:10:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115120819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:10:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818004758] [2023-08-24 00:10:31,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:10:31,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:10:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:10:31,389 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 00:10:31,393 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 00:10:31,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 00:10:31,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:10:31,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 00:10:31,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:10:31,488 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 00:10:31,526 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:10:31,526 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 00:10:31,546 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 00:10:31,587 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 00:10:31,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:10:31,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818004758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:10:31,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:10:31,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-24 00:10:31,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985209128] [2023-08-24 00:10:31,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:10:31,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:10:31,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:10:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:10:31,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-24 00:10:31,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 621 [2023-08-24 00:10:31,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 234.33333333333334) internal successors, (1406), 6 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states 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 00:10:31,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:10:31,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 621 [2023-08-24 00:10:31,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:10:57,297 INFO L124 PetriNetUnfolderBase]: 266830/374105 cut-off events. [2023-08-24 00:10:57,298 INFO L125 PetriNetUnfolderBase]: For 13301/13301 co-relation queries the response was YES. [2023-08-24 00:10:59,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738120 conditions, 374105 events. 266830/374105 cut-off events. For 13301/13301 co-relation queries the response was YES. Maximal size of possible extension queue 9695. Compared 2979488 event pairs, 52310 based on Foata normal form. 0/327033 useless extension candidates. Maximal degree in co-relation 738083. Up to 299605 conditions per place. [2023-08-24 00:11:00,670 INFO L140 encePairwiseOnDemand]: 611/621 looper letters, 202 selfloop transitions, 18 changer transitions 0/235 dead transitions. [2023-08-24 00:11:00,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 235 transitions, 1035 flow [2023-08-24 00:11:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:11:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:11:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1615 transitions. [2023-08-24 00:11:00,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43344068706387545 [2023-08-24 00:11:00,673 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1615 transitions. [2023-08-24 00:11:00,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1615 transitions. [2023-08-24 00:11:00,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:11:00,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1615 transitions. [2023-08-24 00:11:00,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.1666666666667) internal successors, (1615), 6 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 00:11:00,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 621.0) internal successors, (4347), 7 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:11:00,681 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 621.0) internal successors, (4347), 7 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:11:00,681 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 262 flow. Second operand 6 states and 1615 transitions. [2023-08-24 00:11:00,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 235 transitions, 1035 flow [2023-08-24 00:11:00,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 235 transitions, 1021 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:11:00,693 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 353 flow [2023-08-24 00:11:00,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2023-08-24 00:11:00,694 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 19 predicate places. [2023-08-24 00:11:00,694 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 353 flow [2023-08-24 00:11:00,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 234.33333333333334) internal successors, (1406), 6 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states 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 00:11:00,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:11:00,695 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:11:00,704 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 00:11:00,901 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 00:11:00,901 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:11:00,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:11:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash -12873146, now seen corresponding path program 1 times [2023-08-24 00:11:00,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:11:00,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369336741] [2023-08-24 00:11:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:11:00,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:11:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:11:00,964 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 00:11:00,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:11:00,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369336741] [2023-08-24 00:11:00,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369336741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:11:00,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480792937] [2023-08-24 00:11:00,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:11:00,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:11:00,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:11:00,966 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 00:11:00,968 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 00:11:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:11:01,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:11:01,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:11:01,085 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 00:11:01,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:11:01,129 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 00:11:01,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480792937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:11:01,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:11:01,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 00:11:01,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776909141] [2023-08-24 00:11:01,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:11:01,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:11:01,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:11:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:11:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 00:11:01,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 621 [2023-08-24 00:11:01,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 353 flow. Second operand has 13 states, 13 states have (on average 274.6923076923077) internal successors, (3571), 13 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states 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 00:11:01,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:11:01,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 621 [2023-08-24 00:11:01,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:11:23,262 INFO L124 PetriNetUnfolderBase]: 209229/299273 cut-off events. [2023-08-24 00:11:23,263 INFO L125 PetriNetUnfolderBase]: For 59038/59404 co-relation queries the response was YES. [2023-08-24 00:11:24,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634607 conditions, 299273 events. 209229/299273 cut-off events. For 59038/59404 co-relation queries the response was YES. Maximal size of possible extension queue 8582. Compared 2442873 event pairs, 186179 based on Foata normal form. 6/269735 useless extension candidates. Maximal degree in co-relation 634548. Up to 276706 conditions per place. [2023-08-24 00:11:25,662 INFO L140 encePairwiseOnDemand]: 618/621 looper letters, 86 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2023-08-24 00:11:25,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 116 transitions, 583 flow [2023-08-24 00:11:25,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:11:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:11:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3362 transitions. [2023-08-24 00:11:25,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45115405260332797 [2023-08-24 00:11:25,667 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3362 transitions. [2023-08-24 00:11:25,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3362 transitions. [2023-08-24 00:11:25,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:11:25,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3362 transitions. [2023-08-24 00:11:25,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 280.1666666666667) internal successors, (3362), 12 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:11:25,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 621.0) internal successors, (8073), 13 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:11:25,680 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 621.0) internal successors, (8073), 13 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:11:25,680 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 353 flow. Second operand 12 states and 3362 transitions. [2023-08-24 00:11:25,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 116 transitions, 583 flow [2023-08-24 00:11:25,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 116 transitions, 583 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:11:25,827 INFO L231 Difference]: Finished difference. Result has 124 places, 116 transitions, 437 flow [2023-08-24 00:11:25,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=437, PETRI_PLACES=124, PETRI_TRANSITIONS=116} [2023-08-24 00:11:25,827 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 36 predicate places. [2023-08-24 00:11:25,828 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 116 transitions, 437 flow [2023-08-24 00:11:25,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 274.6923076923077) internal successors, (3571), 13 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states 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 00:11:25,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:11:25,828 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:11:25,837 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 00:11:26,034 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 00:11:26,035 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:11:26,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:11:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash -720335258, now seen corresponding path program 2 times [2023-08-24 00:11:26,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:11:26,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146713876] [2023-08-24 00:11:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:11:26,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:11:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:11:26,283 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 00:11:26,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:11:26,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146713876] [2023-08-24 00:11:26,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146713876] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:11:26,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574474801] [2023-08-24 00:11:26,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:11:26,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:11:26,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:11:26,285 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 00:11:26,287 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 00:11:26,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:11:26,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:11:26,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 00:11:26,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:11:26,415 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 00:11:26,466 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:11:26,467 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 00:11:26,484 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 00:11:26,506 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 00:11:26,542 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 00:11:26,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:11:38,652 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_432 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_432) |c_~#a~0.base|))) is different from false [2023-08-24 00:11:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-24 00:11:38,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574474801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:11:38,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:11:38,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-24 00:11:38,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637865148] [2023-08-24 00:11:38,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:11:38,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 00:11:38,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:11:38,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 00:11:38,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=4, NotChecked=18, Total=132 [2023-08-24 00:11:38,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 621 [2023-08-24 00:11:38,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 116 transitions, 437 flow. Second operand has 12 states, 12 states have (on average 235.75) internal successors, (2829), 12 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states 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 00:11:38,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:11:38,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 621 [2023-08-24 00:11:38,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:10,845 INFO L124 PetriNetUnfolderBase]: 297418/417623 cut-off events. [2023-08-24 00:12:10,845 INFO L125 PetriNetUnfolderBase]: For 75099/75099 co-relation queries the response was YES. [2023-08-24 00:12:13,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889061 conditions, 417623 events. 297418/417623 cut-off events. For 75099/75099 co-relation queries the response was YES. Maximal size of possible extension queue 11185. Compared 3375418 event pairs, 57421 based on Foata normal form. 0/383330 useless extension candidates. Maximal degree in co-relation 888977. Up to 299997 conditions per place. [2023-08-24 00:12:14,742 INFO L140 encePairwiseOnDemand]: 607/621 looper letters, 250 selfloop transitions, 36 changer transitions 0/301 dead transitions. [2023-08-24 00:12:14,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 301 transitions, 1498 flow [2023-08-24 00:12:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 00:12:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 00:12:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1897 transitions. [2023-08-24 00:12:14,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363929146537842 [2023-08-24 00:12:14,747 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1897 transitions. [2023-08-24 00:12:14,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1897 transitions. [2023-08-24 00:12:14,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:14,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1897 transitions. [2023-08-24 00:12:14,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:14,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 621.0) internal successors, (4968), 8 states have internal predecessors, (4968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:14,781 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 621.0) internal successors, (4968), 8 states have internal predecessors, (4968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:14,781 INFO L175 Difference]: Start difference. First operand has 124 places, 116 transitions, 437 flow. Second operand 7 states and 1897 transitions. [2023-08-24 00:12:14,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 301 transitions, 1498 flow [2023-08-24 00:12:15,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 301 transitions, 1450 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-24 00:12:15,479 INFO L231 Difference]: Finished difference. Result has 129 places, 136 transitions, 614 flow [2023-08-24 00:12:15,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=621, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=614, PETRI_PLACES=129, PETRI_TRANSITIONS=136} [2023-08-24 00:12:15,480 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 41 predicate places. [2023-08-24 00:12:15,481 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 136 transitions, 614 flow [2023-08-24 00:12:15,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 235.75) internal successors, (2829), 12 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states 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 00:12:15,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:15,482 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 00:12:15,490 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 00:12:15,687 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 00:12:15,687 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:12:15,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:15,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1688672413, now seen corresponding path program 1 times [2023-08-24 00:12:15,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:15,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815013622] [2023-08-24 00:12:15,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:15,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:12:15,757 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:12:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:12:15,786 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:12:15,786 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:12:15,787 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-24 00:12:15,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-24 00:12:15,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-24 00:12:15,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-24 00:12:15,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-24 00:12:15,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-24 00:12:15,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 00:12:15,787 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-08-24 00:12:15,788 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:12:15,788 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 00:12:15,840 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 00:12:15,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 00:12:16,049 INFO L124 PetriNetUnfolderBase]: 157/912 cut-off events. [2023-08-24 00:12:16,050 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 00:12:16,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 912 events. 157/912 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4361 event pairs, 6 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 661. Up to 32 conditions per place. [2023-08-24 00:12:16,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 00:12:16,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 351 places, 415 transitions, 874 flow [2023-08-24 00:12:16,115 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:12:16,115 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 351 places, 415 transitions, 874 flow [2023-08-24 00:12:16,115 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 351 places, 415 transitions, 874 flow [2023-08-24 00:12:16,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 415 transitions, 874 flow [2023-08-24 00:12:16,323 INFO L124 PetriNetUnfolderBase]: 157/912 cut-off events. [2023-08-24 00:12:16,323 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 00:12:16,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 912 events. 157/912 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4361 event pairs, 6 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 661. Up to 32 conditions per place. [2023-08-24 00:12:16,442 INFO L119 LiptonReduction]: Number of co-enabled transitions 109624 [2023-08-24 00:12:21,627 INFO L134 LiptonReduction]: Checked pairs total: 192660 [2023-08-24 00:12:21,628 INFO L136 LiptonReduction]: Total number of compositions: 341 [2023-08-24 00:12:21,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:12:21,629 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;@428773b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:12:21,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-24 00:12:21,631 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:12:21,631 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-08-24 00:12:21,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:12:21,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:21,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:12:21,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-24 00:12:21,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash -977671747, now seen corresponding path program 1 times [2023-08-24 00:12:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:21,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092223128] [2023-08-24 00:12:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:21,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:21,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:21,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092223128] [2023-08-24 00:12:21,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092223128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:12:21,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:12:21,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:12:21,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869108768] [2023-08-24 00:12:21,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:12:21,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:12:21,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:21,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:12:21,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:12:21,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 756 [2023-08-24 00:12:21,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:12:21,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:21,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 756 [2023-08-24 00:12:21,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand