/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:35:28,883 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:35:28,959 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-SemanticLbe.epf [2023-11-17 15:35:28,981 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:35:28,982 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:35:28,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:35:28,983 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:35:28,983 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:35:28,983 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:35:28,986 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:35:28,987 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:35:28,987 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:35:28,987 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:35:28,988 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:35:28,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:35:28,988 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:35:28,988 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:35:28,989 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:35:28,989 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:35:28,989 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:35:28,989 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:35:28,990 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:35:28,990 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:35:28,990 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:35:28,990 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:35:28,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:35:28,990 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:35:28,990 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:35:28,991 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:35:28,991 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:35:28,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:35:28,992 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:35:28,992 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:35:29,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:35:29,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:35:29,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:35:29,182 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:35:29,182 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:35:29,183 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i [2023-11-17 15:35:30,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:35:30,436 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:35:30,441 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i [2023-11-17 15:35:30,459 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e88d713bf/2f2b1bf0c3f844d7aaa9c5447d921838/FLAGc39953c93 [2023-11-17 15:35:30,470 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e88d713bf/2f2b1bf0c3f844d7aaa9c5447d921838 [2023-11-17 15:35:30,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:35:30,473 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:35:30,474 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:35:30,474 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:35:30,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:35:30,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:30,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a9ff09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30, skipping insertion in model container [2023-11-17 15:35:30,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:30,520 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:35:30,854 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_08-cond_racefree.i[41322,41335] [2023-11-17 15:35:30,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:35:30,891 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:35:30,931 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_08-cond_racefree.i[41322,41335] [2023-11-17 15:35:30,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:35:30,987 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:35:30,988 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30 WrapperNode [2023-11-17 15:35:30,988 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:35:30,989 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:35:30,989 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:35:30,989 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:35:30,996 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:31,012 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:31,085 INFO L138 Inliner]: procedures = 271, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2023-11-17 15:35:31,085 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:35:31,085 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:35:31,086 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:35:31,086 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:35:31,092 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:31,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:31,094 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:31,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:31,098 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:31,101 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:31,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:31,103 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:31,104 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:35:31,105 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:35:31,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:35:31,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:35:31,105 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (1/1) ... [2023-11-17 15:35:31,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:35:31,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:35:31,128 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) [2023-11-17 15:35:31,133 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 [2023-11-17 15:35:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:35:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:35:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:35:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:35:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:35:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:35:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:35:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:35:31,150 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:35:31,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:35:31,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:35:31,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:35:31,152 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:35:31,238 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:35:31,240 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:35:31,378 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:35:31,408 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:35:31,408 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 15:35:31,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:35:31 BoogieIcfgContainer [2023-11-17 15:35:31,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:35:31,410 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:35:31,410 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:35:31,412 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:35:31,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:35:30" (1/3) ... [2023-11-17 15:35:31,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3b2fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:35:31, skipping insertion in model container [2023-11-17 15:35:31,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:30" (2/3) ... [2023-11-17 15:35:31,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3b2fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:35:31, skipping insertion in model container [2023-11-17 15:35:31,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:35:31" (3/3) ... [2023-11-17 15:35:31,414 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_08-cond_racefree.i [2023-11-17 15:35:31,425 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:35:31,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:35:31,425 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:35:31,459 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:35:31,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 131 transitions, 269 flow [2023-11-17 15:35:31,529 INFO L124 PetriNetUnfolderBase]: 23/180 cut-off events. [2023-11-17 15:35:31,530 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:35:31,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 180 events. 23/180 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 441 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-11-17 15:35:31,535 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 131 transitions, 269 flow [2023-11-17 15:35:31,538 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 126 transitions, 256 flow [2023-11-17 15:35:31,540 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:35:31,548 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 126 transitions, 256 flow [2023-11-17 15:35:31,550 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 126 transitions, 256 flow [2023-11-17 15:35:31,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 126 transitions, 256 flow [2023-11-17 15:35:31,587 INFO L124 PetriNetUnfolderBase]: 22/175 cut-off events. [2023-11-17 15:35:31,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:31,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 175 events. 22/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 427 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-11-17 15:35:31,597 INFO L119 LiptonReduction]: Number of co-enabled transitions 3410 [2023-11-17 15:35:34,401 INFO L134 LiptonReduction]: Checked pairs total: 4778 [2023-11-17 15:35:34,401 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-11-17 15:35:34,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:35:34,416 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=LoopHeads, 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;@522def8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:35:34,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:35:34,434 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:35:34,439 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-11-17 15:35:34,440 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:34,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:34,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:35:34,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:34,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash 16951822, now seen corresponding path program 1 times [2023-11-17 15:35:34,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:34,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889206793] [2023-11-17 15:35:34,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:34,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:35:34,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:34,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889206793] [2023-11-17 15:35:34,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889206793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:35:34,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:35:34,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:35:34,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692584282] [2023-11-17 15:35:34,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:35:34,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:35:34,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:34,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:35:34,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:35:34,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 253 [2023-11-17 15:35:34,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:34,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:34,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 253 [2023-11-17 15:35:34,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:35:34,811 INFO L124 PetriNetUnfolderBase]: 89/200 cut-off events. [2023-11-17 15:35:34,812 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:34,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 200 events. 89/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 855 event pairs, 0 based on Foata normal form. 11/175 useless extension candidates. Maximal degree in co-relation 375. Up to 180 conditions per place. [2023-11-17 15:35:34,816 INFO L140 encePairwiseOnDemand]: 240/253 looper letters, 22 selfloop transitions, 2 changer transitions 6/32 dead transitions. [2023-11-17 15:35:34,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 128 flow [2023-11-17 15:35:34,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:35:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:35:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-11-17 15:35:34,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492753623188406 [2023-11-17 15:35:34,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-11-17 15:35:34,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-11-17 15:35:34,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:35:34,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-11-17 15:35:34,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:34,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:34,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:34,849 INFO L175 Difference]: Start difference. First operand has 25 places, 32 transitions, 68 flow. Second operand 3 states and 341 transitions. [2023-11-17 15:35:34,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 128 flow [2023-11-17 15:35:34,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:35:34,854 INFO L231 Difference]: Finished difference. Result has 28 places, 17 transitions, 46 flow [2023-11-17 15:35:34,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2023-11-17 15:35:34,858 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-17 15:35:34,858 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 46 flow [2023-11-17 15:35:34,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:34,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:34,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:35:34,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:35:34,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:34,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:34,862 INFO L85 PathProgramCache]: Analyzing trace with hash -928327417, now seen corresponding path program 1 times [2023-11-17 15:35:34,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:34,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890827852] [2023-11-17 15:35:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:34,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:34,894 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:35:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:34,944 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:35:34,944 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:35:34,946 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:35:34,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:35:34,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:35:34,948 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:35:34,951 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:35:34,951 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:35:34,975 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:35:34,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:35,011 INFO L124 PetriNetUnfolderBase]: 40/288 cut-off events. [2023-11-17 15:35:35,011 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:35:35,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 288 events. 40/288 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 895 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 182. Up to 9 conditions per place. [2023-11-17 15:35:35,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:35,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:35,016 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:35:35,016 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:35,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:35,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:35,057 INFO L124 PetriNetUnfolderBase]: 40/288 cut-off events. [2023-11-17 15:35:35,057 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:35:35,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 288 events. 40/288 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 895 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 182. Up to 9 conditions per place. [2023-11-17 15:35:35,063 INFO L119 LiptonReduction]: Number of co-enabled transitions 9424 [2023-11-17 15:35:38,101 INFO L134 LiptonReduction]: Checked pairs total: 18934 [2023-11-17 15:35:38,102 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-11-17 15:35:38,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:35:38,104 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=LoopHeads, 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;@522def8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:35:38,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:35:38,106 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:35:38,106 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-11-17 15:35:38,106 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:38,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:38,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:35:38,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:38,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash 27575275, now seen corresponding path program 1 times [2023-11-17 15:35:38,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:38,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614786684] [2023-11-17 15:35:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:38,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:35:38,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:38,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614786684] [2023-11-17 15:35:38,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614786684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:35:38,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:35:38,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:35:38,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201728842] [2023-11-17 15:35:38,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:35:38,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:35:38,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:38,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:35:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:35:38,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 312 [2023-11-17 15:35:38,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 57 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:38,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:38,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 312 [2023-11-17 15:35:38,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:35:38,413 INFO L124 PetriNetUnfolderBase]: 1869/3104 cut-off events. [2023-11-17 15:35:38,413 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-17 15:35:38,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6138 conditions, 3104 events. 1869/3104 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 17603 event pairs, 840 based on Foata normal form. 225/2924 useless extension candidates. Maximal degree in co-relation 725. Up to 2974 conditions per place. [2023-11-17 15:35:38,421 INFO L140 encePairwiseOnDemand]: 293/312 looper letters, 32 selfloop transitions, 2 changer transitions 10/51 dead transitions. [2023-11-17 15:35:38,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-11-17 15:35:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:35:38,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:35:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-11-17 15:35:38,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2023-11-17 15:35:38,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-11-17 15:35:38,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-11-17 15:35:38,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:35:38,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-11-17 15:35:38,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:38,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:38,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:38,428 INFO L175 Difference]: Start difference. First operand has 44 places, 57 transitions, 130 flow. Second operand 3 states and 417 transitions. [2023-11-17 15:35:38,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-11-17 15:35:38,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:35:38,431 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-11-17 15:35:38,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-11-17 15:35:38,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-17 15:35:38,432 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-11-17 15:35:38,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:38,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:38,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:35:38,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:35:38,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:38,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2145186740, now seen corresponding path program 1 times [2023-11-17 15:35:38,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:38,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673380747] [2023-11-17 15:35:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:38,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:35:38,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:38,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673380747] [2023-11-17 15:35:38,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673380747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:35:38,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869742366] [2023-11-17 15:35:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:38,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:35:38,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:35:38,513 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) [2023-11-17 15:35:38,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:35:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:38,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:35:38,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:35:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:35:38,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:35:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:35:38,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869742366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:35:38,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:35:38,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:35:38,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090122710] [2023-11-17 15:35:38,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:35:38,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:35:38,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:38,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:35:38,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:35:38,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 312 [2023-11-17 15:35:38,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 119.28571428571429) internal successors, (835), 7 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:38,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:38,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 312 [2023-11-17 15:35:38,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:35:38,755 INFO L124 PetriNetUnfolderBase]: 405/804 cut-off events. [2023-11-17 15:35:38,756 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2023-11-17 15:35:38,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1636 conditions, 804 events. 405/804 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4159 event pairs, 0 based on Foata normal form. 96/899 useless extension candidates. Maximal degree in co-relation 207. Up to 490 conditions per place. [2023-11-17 15:35:38,759 INFO L140 encePairwiseOnDemand]: 309/312 looper letters, 46 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-11-17 15:35:38,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2023-11-17 15:35:38,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:35:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:35:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 636 transitions. [2023-11-17 15:35:38,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2023-11-17 15:35:38,761 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 636 transitions. [2023-11-17 15:35:38,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 636 transitions. [2023-11-17 15:35:38,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:35:38,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 636 transitions. [2023-11-17 15:35:38,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:38,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 312.0) internal successors, (1872), 6 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:38,765 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 312.0) internal successors, (1872), 6 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:38,765 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 5 states and 636 transitions. [2023-11-17 15:35:38,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2023-11-17 15:35:38,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:35:38,767 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-17 15:35:38,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-17 15:35:38,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-17 15:35:38,767 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-17 15:35:38,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.28571428571429) internal successors, (835), 7 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:38,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:38,768 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:35:38,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 15:35:38,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:35:38,974 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:38,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:38,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1076537098, now seen corresponding path program 1 times [2023-11-17 15:35:38,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:38,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684817804] [2023-11-17 15:35:38,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:38,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:38,984 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:35:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:38,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:35:38,995 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:35:38,995 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:35:38,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:35:38,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:35:38,995 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:35:38,996 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:35:38,996 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:35:39,011 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:35:39,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:39,038 INFO L124 PetriNetUnfolderBase]: 62/431 cut-off events. [2023-11-17 15:35:39,038 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:35:39,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 431 events. 62/431 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1496 event pairs, 1 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 296. Up to 16 conditions per place. [2023-11-17 15:35:39,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:39,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:39,043 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:35:39,043 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:39,043 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:39,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:39,069 INFO L124 PetriNetUnfolderBase]: 62/431 cut-off events. [2023-11-17 15:35:39,069 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:35:39,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 431 events. 62/431 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1496 event pairs, 1 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 296. Up to 16 conditions per place. [2023-11-17 15:35:39,081 INFO L119 LiptonReduction]: Number of co-enabled transitions 17298 [2023-11-17 15:35:42,200 INFO L134 LiptonReduction]: Checked pairs total: 37776 [2023-11-17 15:35:42,201 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-11-17 15:35:42,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:35:42,203 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=LoopHeads, 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;@522def8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:35:42,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:35:42,204 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:35:42,204 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-11-17 15:35:42,204 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:42,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:42,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:35:42,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:42,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash 40104669, now seen corresponding path program 1 times [2023-11-17 15:35:42,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:42,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823122126] [2023-11-17 15:35:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:42,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:35:42,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:42,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823122126] [2023-11-17 15:35:42,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823122126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:35:42,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:35:42,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:35:42,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980606980] [2023-11-17 15:35:42,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:35:42,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:35:42,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:42,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:35:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:35:42,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 374 [2023-11-17 15:35:42,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 76 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:42,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:42,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 374 [2023-11-17 15:35:42,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:35:44,142 INFO L124 PetriNetUnfolderBase]: 21220/31398 cut-off events. [2023-11-17 15:35:44,143 INFO L125 PetriNetUnfolderBase]: For 1003/1003 co-relation queries the response was YES. [2023-11-17 15:35:44,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61752 conditions, 31398 events. 21220/31398 cut-off events. For 1003/1003 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 213909 event pairs, 13475 based on Foata normal form. 2817/30953 useless extension candidates. Maximal degree in co-relation 6528. Up to 29760 conditions per place. [2023-11-17 15:35:44,242 INFO L140 encePairwiseOnDemand]: 349/374 looper letters, 38 selfloop transitions, 2 changer transitions 11/63 dead transitions. [2023-11-17 15:35:44,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 253 flow [2023-11-17 15:35:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:35:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:35:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-11-17 15:35:44,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43404634581105167 [2023-11-17 15:35:44,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-11-17 15:35:44,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-11-17 15:35:44,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:35:44,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-11-17 15:35:44,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:44,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:44,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:44,247 INFO L175 Difference]: Start difference. First operand has 58 places, 76 transitions, 179 flow. Second operand 3 states and 487 transitions. [2023-11-17 15:35:44,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 253 flow [2023-11-17 15:35:44,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 253 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:35:44,249 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 118 flow [2023-11-17 15:35:44,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-11-17 15:35:44,252 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-17 15:35:44,252 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 118 flow [2023-11-17 15:35:44,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:44,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:44,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:35:44,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:35:44,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:44,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:44,253 INFO L85 PathProgramCache]: Analyzing trace with hash 734062866, now seen corresponding path program 1 times [2023-11-17 15:35:44,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:44,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399883167] [2023-11-17 15:35:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:44,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:35:44,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:44,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399883167] [2023-11-17 15:35:44,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399883167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:35:44,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936592221] [2023-11-17 15:35:44,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:44,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:35:44,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:35:44,365 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) [2023-11-17 15:35:44,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:35:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:44,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:35:44,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:35:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:35:44,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:35:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:35:44,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936592221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:35:44,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:35:44,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:35:44,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321018062] [2023-11-17 15:35:44,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:35:44,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:35:44,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:35:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:35:44,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 374 [2023-11-17 15:35:44,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 138.28571428571428) internal successors, (968), 7 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:44,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:44,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 374 [2023-11-17 15:35:44,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:35:45,078 INFO L124 PetriNetUnfolderBase]: 4759/7469 cut-off events. [2023-11-17 15:35:45,078 INFO L125 PetriNetUnfolderBase]: For 2184/2184 co-relation queries the response was YES. [2023-11-17 15:35:45,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15376 conditions, 7469 events. 4759/7469 cut-off events. For 2184/2184 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 47103 event pairs, 420 based on Foata normal form. 707/8175 useless extension candidates. Maximal degree in co-relation 2276. Up to 4594 conditions per place. [2023-11-17 15:35:45,104 INFO L140 encePairwiseOnDemand]: 371/374 looper letters, 74 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-11-17 15:35:45,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 90 transitions, 364 flow [2023-11-17 15:35:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:35:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:35:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 897 transitions. [2023-11-17 15:35:45,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997326203208556 [2023-11-17 15:35:45,107 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 897 transitions. [2023-11-17 15:35:45,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 897 transitions. [2023-11-17 15:35:45,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:35:45,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 897 transitions. [2023-11-17 15:35:45,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.5) internal successors, (897), 6 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:45,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:45,112 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:45,112 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 118 flow. Second operand 6 states and 897 transitions. [2023-11-17 15:35:45,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 90 transitions, 364 flow [2023-11-17 15:35:45,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 90 transitions, 360 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:35:45,115 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-17 15:35:45,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-17 15:35:45,115 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-17 15:35:45,116 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-17 15:35:45,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.28571428571428) internal successors, (968), 7 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:45,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:45,116 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:35:45,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 15:35:45,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-17 15:35:45,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:45,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:45,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1982150512, now seen corresponding path program 1 times [2023-11-17 15:35:45,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:45,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122538855] [2023-11-17 15:35:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:45,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:45,340 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:35:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:45,362 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:35:45,363 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:35:45,363 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:35:45,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:35:45,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:35:45,363 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:35:45,364 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:35:45,364 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:35:45,387 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:35:45,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:45,438 INFO L124 PetriNetUnfolderBase]: 96/646 cut-off events. [2023-11-17 15:35:45,438 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:35:45,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 646 events. 96/646 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2521 event pairs, 6 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 451. Up to 32 conditions per place. [2023-11-17 15:35:45,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:45,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:45,445 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:35:45,445 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:45,445 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:45,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:45,488 INFO L124 PetriNetUnfolderBase]: 96/646 cut-off events. [2023-11-17 15:35:45,488 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:35:45,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 646 events. 96/646 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2521 event pairs, 6 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 451. Up to 32 conditions per place. [2023-11-17 15:35:45,507 INFO L119 LiptonReduction]: Number of co-enabled transitions 27280 [2023-11-17 15:35:48,993 INFO L134 LiptonReduction]: Checked pairs total: 63693 [2023-11-17 15:35:48,993 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-11-17 15:35:48,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:35:48,994 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=LoopHeads, 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;@522def8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:35:48,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:35:48,996 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:35:48,996 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-11-17 15:35:48,996 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:48,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:48,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:35:48,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:48,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash 54407542, now seen corresponding path program 1 times [2023-11-17 15:35:48,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:48,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587745066] [2023-11-17 15:35:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:48,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:35:49,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:49,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587745066] [2023-11-17 15:35:49,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587745066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:35:49,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:35:49,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:35:49,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374597143] [2023-11-17 15:35:49,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:35:49,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:35:49,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:49,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:35:49,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:35:49,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 432 [2023-11-17 15:35:49,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 95 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:49,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:49,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 432 [2023-11-17 15:35:49,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:22,267 INFO L124 PetriNetUnfolderBase]: 380643/509536 cut-off events. [2023-11-17 15:36:22,267 INFO L125 PetriNetUnfolderBase]: For 19084/19084 co-relation queries the response was YES. [2023-11-17 15:36:23,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011618 conditions, 509536 events. 380643/509536 cut-off events. For 19084/19084 co-relation queries the response was YES. Maximal size of possible extension queue 10099. Compared 3712626 event pairs, 274838 based on Foata normal form. 44668/513527 useless extension candidates. Maximal degree in co-relation 87139. Up to 493007 conditions per place. [2023-11-17 15:36:24,076 INFO L140 encePairwiseOnDemand]: 401/432 looper letters, 52 selfloop transitions, 2 changer transitions 12/78 dead transitions. [2023-11-17 15:36:24,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 326 flow [2023-11-17 15:36:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-11-17 15:36:24,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359567901234568 [2023-11-17 15:36:24,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-11-17 15:36:24,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-11-17 15:36:24,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:24,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-11-17 15:36:24,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:24,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:24,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:24,081 INFO L175 Difference]: Start difference. First operand has 72 places, 95 transitions, 230 flow. Second operand 3 states and 565 transitions. [2023-11-17 15:36:24,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 326 flow [2023-11-17 15:36:24,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:24,087 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 152 flow [2023-11-17 15:36:24,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-11-17 15:36:24,087 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-11-17 15:36:24,087 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 152 flow [2023-11-17 15:36:24,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:24,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:24,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:36:24,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:36:24,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:24,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:24,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1836887550, now seen corresponding path program 1 times [2023-11-17 15:36:24,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:24,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565213541] [2023-11-17 15:36:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:24,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:24,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:24,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565213541] [2023-11-17 15:36:24,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565213541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:36:24,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288218097] [2023-11-17 15:36:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:24,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:36:24,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:24,113 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) [2023-11-17 15:36:24,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 15:36:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:24,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:36:24,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:36:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:24,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:36:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:24,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288218097] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:36:24,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:36:24,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:36:24,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272282867] [2023-11-17 15:36:24,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:36:24,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:36:24,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:36:24,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:36:24,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 432 [2023-11-17 15:36:24,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:24,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:24,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 432 [2023-11-17 15:36:24,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:37,354 INFO L124 PetriNetUnfolderBase]: 172795/229372 cut-off events. [2023-11-17 15:36:37,354 INFO L125 PetriNetUnfolderBase]: For 19012/19012 co-relation queries the response was YES. [2023-11-17 15:36:37,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475062 conditions, 229372 events. 172795/229372 cut-off events. For 19012/19012 co-relation queries the response was YES. Maximal size of possible extension queue 5077. Compared 1572386 event pairs, 7312 based on Foata normal form. 909/230280 useless extension candidates. Maximal degree in co-relation 150727. Up to 148321 conditions per place. [2023-11-17 15:36:38,437 INFO L140 encePairwiseOnDemand]: 428/432 looper letters, 129 selfloop transitions, 6 changer transitions 0/147 dead transitions. [2023-11-17 15:36:38,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 147 transitions, 606 flow [2023-11-17 15:36:38,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:36:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:36:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1068 transitions. [2023-11-17 15:36:38,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41203703703703703 [2023-11-17 15:36:38,440 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1068 transitions. [2023-11-17 15:36:38,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1068 transitions. [2023-11-17 15:36:38,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:38,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1068 transitions. [2023-11-17 15:36:38,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:38,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:38,446 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:38,446 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 152 flow. Second operand 6 states and 1068 transitions. [2023-11-17 15:36:38,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 147 transitions, 606 flow [2023-11-17 15:36:38,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 147 transitions, 598 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 15:36:38,452 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 184 flow [2023-11-17 15:36:38,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-11-17 15:36:38,453 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-11-17 15:36:38,453 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 184 flow [2023-11-17 15:36:38,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:38,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:38,453 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:36:38,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 15:36:38,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:36:38,658 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:38,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash 218386911, now seen corresponding path program 1 times [2023-11-17 15:36:38,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:38,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369357494] [2023-11-17 15:36:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:38,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:38,669 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:38,681 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:38,681 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:38,681 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:36:38,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:36:38,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:36:38,681 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:36:38,682 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:38,682 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:36:38,705 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 15:36:38,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 263 transitions, 581 flow [2023-11-17 15:36:38,788 INFO L124 PetriNetUnfolderBase]: 158/1009 cut-off events. [2023-11-17 15:36:38,788 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:36:38,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 1009 events. 158/1009 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4630 event pairs, 23 based on Foata normal form. 0/861 useless extension candidates. Maximal degree in co-relation 691. Up to 80 conditions per place. [2023-11-17 15:36:38,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 263 transitions, 581 flow [2023-11-17 15:36:38,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 263 transitions, 581 flow [2023-11-17 15:36:38,800 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:38,800 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 263 transitions, 581 flow [2023-11-17 15:36:38,801 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 263 transitions, 581 flow [2023-11-17 15:36:38,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 263 transitions, 581 flow [2023-11-17 15:36:38,884 INFO L124 PetriNetUnfolderBase]: 158/1009 cut-off events. [2023-11-17 15:36:38,885 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:36:38,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 1009 events. 158/1009 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4630 event pairs, 23 based on Foata normal form. 0/861 useless extension candidates. Maximal degree in co-relation 691. Up to 80 conditions per place. [2023-11-17 15:36:38,914 INFO L119 LiptonReduction]: Number of co-enabled transitions 39370 [2023-11-17 15:36:42,902 INFO L134 LiptonReduction]: Checked pairs total: 97866 [2023-11-17 15:36:42,902 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-11-17 15:36:42,903 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:42,903 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=LoopHeads, 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;@522def8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:42,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:36:42,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:42,905 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-11-17 15:36:42,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:42,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:42,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:36:42,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:42,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:42,905 INFO L85 PathProgramCache]: Analyzing trace with hash 70485803, now seen corresponding path program 1 times [2023-11-17 15:36:42,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:42,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345319079] [2023-11-17 15:36:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:42,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:42,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:42,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345319079] [2023-11-17 15:36:42,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345319079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:42,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:42,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:36:42,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379311101] [2023-11-17 15:36:42,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:42,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:42,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:42,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:42,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:42,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 489 [2023-11-17 15:36:42,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 114 transitions, 283 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:42,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:42,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 489 [2023-11-17 15:36:42,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand