/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_20-callback_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:36:42,630 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:36:42,681 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 15:36:42,706 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:36:42,707 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:36:42,707 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:36:42,708 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:36:42,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:36:42,708 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:36:42,709 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:36:42,709 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:36:42,709 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:36:42,710 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:36:42,710 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:36:42,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:36:42,710 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:36:42,711 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:36:42,711 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:36:42,711 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:36:42,712 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:36:42,712 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:36:42,713 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:36:42,713 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:36:42,713 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:36:42,713 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:36:42,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:36:42,714 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:36:42,714 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:36:42,715 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:36:42,715 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:36:42,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:36:42,715 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:36:42,716 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:36:42,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:36:42,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:36:42,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:36:42,985 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:36:42,985 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:36:42,986 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-11-17 15:36:44,207 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:36:44,404 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:36:44,405 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-11-17 15:36:44,418 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80bb8518e/abc773a843fe46cab158de9377875950/FLAGa238bdeb4 [2023-11-17 15:36:44,431 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80bb8518e/abc773a843fe46cab158de9377875950 [2023-11-17 15:36:44,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:36:44,435 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:36:44,436 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:36:44,436 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:36:44,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:36:44,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:44,442 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbf862c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44, skipping insertion in model container [2023-11-17 15:36:44,442 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:44,483 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:36:44,764 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_20-callback_racefree.i[30212,30225] [2023-11-17 15:36:44,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:36:44,813 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:36:44,850 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_20-callback_racefree.i[30212,30225] [2023-11-17 15:36:44,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:36:44,892 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:36:44,898 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:36:44,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44 WrapperNode [2023-11-17 15:36:44,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:36:44,901 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:36:44,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:36:44,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:36:44,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:44,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:44,966 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2023-11-17 15:36:44,967 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:36:44,967 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:36:44,968 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:36:44,968 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:36:44,975 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:44,975 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:44,997 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:44,998 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:45,003 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:45,006 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:45,008 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:45,009 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:45,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:36:45,029 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:36:45,029 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:36:45,029 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:36:45,030 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (1/1) ... [2023-11-17 15:36:45,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:36:45,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:45,138 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 15:36:45,144 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 15:36:45,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:36:45,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:36:45,165 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:36:45,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:36:45,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:36:45,165 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:36:45,165 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:36:45,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:36:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:36:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:36:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:36:45,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:36:45,167 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 15:36:45,294 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:36:45,297 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:36:45,563 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:36:45,617 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:36:45,617 INFO L307 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-17 15:36:45,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:45 BoogieIcfgContainer [2023-11-17 15:36:45,619 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:36:45,621 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:36:45,621 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:36:45,624 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:36:45,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:36:44" (1/3) ... [2023-11-17 15:36:45,625 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29478201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:45, skipping insertion in model container [2023-11-17 15:36:45,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:44" (2/3) ... [2023-11-17 15:36:45,625 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29478201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:45, skipping insertion in model container [2023-11-17 15:36:45,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:45" (3/3) ... [2023-11-17 15:36:45,626 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2023-11-17 15:36:45,645 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:36:45,646 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:36:45,646 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:36:45,709 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:36:45,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 153 transitions, 313 flow [2023-11-17 15:36:45,848 INFO L124 PetriNetUnfolderBase]: 26/235 cut-off events. [2023-11-17 15:36:45,848 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:36:45,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 235 events. 26/235 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 668 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 117. Up to 6 conditions per place. [2023-11-17 15:36:45,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 153 transitions, 313 flow [2023-11-17 15:36:45,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 148 transitions, 300 flow [2023-11-17 15:36:45,867 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:45,887 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 148 transitions, 300 flow [2023-11-17 15:36:45,891 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 148 transitions, 300 flow [2023-11-17 15:36:45,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 148 transitions, 300 flow [2023-11-17 15:36:45,946 INFO L124 PetriNetUnfolderBase]: 25/230 cut-off events. [2023-11-17 15:36:45,946 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:45,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 230 events. 25/230 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 614 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 117. Up to 6 conditions per place. [2023-11-17 15:36:45,953 INFO L119 LiptonReduction]: Number of co-enabled transitions 4224 [2023-11-17 15:36:49,563 INFO L134 LiptonReduction]: Checked pairs total: 5113 [2023-11-17 15:36:49,564 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-11-17 15:36:49,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:49,590 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;@391b93eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:49,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:36:49,594 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:49,594 INFO L124 PetriNetUnfolderBase]: 9/28 cut-off events. [2023-11-17 15:36:49,595 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:49,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:49,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:36:49,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:36:49,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:49,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1046471260, now seen corresponding path program 1 times [2023-11-17 15:36:49,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:49,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004314059] [2023-11-17 15:36:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:49,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:49,984 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 15:36:49,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:49,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004314059] [2023-11-17 15:36:49,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004314059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:49,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:49,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:36:49,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030269250] [2023-11-17 15:36:49,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:49,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:49,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:50,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:50,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:50,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 301 [2023-11-17 15:36:50,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 33 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 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 15:36:50,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:50,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 301 [2023-11-17 15:36:50,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:50,114 INFO L124 PetriNetUnfolderBase]: 116/264 cut-off events. [2023-11-17 15:36:50,114 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:50,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 264 events. 116/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 924 event pairs, 38 based on Foata normal form. 15/233 useless extension candidates. Maximal degree in co-relation 473. Up to 136 conditions per place. [2023-11-17 15:36:50,117 INFO L140 encePairwiseOnDemand]: 286/301 looper letters, 25 selfloop transitions, 2 changer transitions 9/38 dead transitions. [2023-11-17 15:36:50,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 38 transitions, 152 flow [2023-11-17 15:36:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-11-17 15:36:50,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2023-11-17 15:36:50,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-11-17 15:36:50,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-11-17 15:36:50,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:50,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-11-17 15:36:50,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 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 15:36:50,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 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 15:36:50,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 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 15:36:50,145 INFO L175 Difference]: Start difference. First operand has 25 places, 33 transitions, 70 flow. Second operand 3 states and 423 transitions. [2023-11-17 15:36:50,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 38 transitions, 152 flow [2023-11-17 15:36:50,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:50,149 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 68 flow [2023-11-17 15:36:50,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-11-17 15:36:50,155 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-17 15:36:50,155 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 68 flow [2023-11-17 15:36:50,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 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 15:36:50,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:50,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:36:50,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:36:50,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:36:50,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1046485277, now seen corresponding path program 1 times [2023-11-17 15:36:50,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:50,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337835775] [2023-11-17 15:36:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:50,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:50,175 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:50,205 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:50,205 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:50,207 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:36:50,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:36:50,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:36:50,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:36:50,209 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:36:50,213 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:50,213 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:36:50,239 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:36:50,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 179 transitions, 374 flow [2023-11-17 15:36:50,286 INFO L124 PetriNetUnfolderBase]: 43/369 cut-off events. [2023-11-17 15:36:50,287 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:36:50,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 369 events. 43/369 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1355 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 237. Up to 9 conditions per place. [2023-11-17 15:36:50,291 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 179 transitions, 374 flow [2023-11-17 15:36:50,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 179 transitions, 374 flow [2023-11-17 15:36:50,293 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:50,294 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 179 transitions, 374 flow [2023-11-17 15:36:50,294 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 179 transitions, 374 flow [2023-11-17 15:36:50,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 179 transitions, 374 flow [2023-11-17 15:36:50,348 INFO L124 PetriNetUnfolderBase]: 43/369 cut-off events. [2023-11-17 15:36:50,348 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:36:50,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 369 events. 43/369 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1355 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 237. Up to 9 conditions per place. [2023-11-17 15:36:50,358 INFO L119 LiptonReduction]: Number of co-enabled transitions 10128 [2023-11-17 15:36:53,744 INFO L134 LiptonReduction]: Checked pairs total: 14438 [2023-11-17 15:36:53,744 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-11-17 15:36:53,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:53,747 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;@391b93eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:53,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:36:53,750 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:53,751 INFO L124 PetriNetUnfolderBase]: 8/28 cut-off events. [2023-11-17 15:36:53,751 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:36:53,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:53,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:36:53,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:36:53,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:53,752 INFO L85 PathProgramCache]: Analyzing trace with hash -655814705, now seen corresponding path program 1 times [2023-11-17 15:36:53,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:53,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591571999] [2023-11-17 15:36:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:53,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:53,835 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 15:36:53,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:53,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591571999] [2023-11-17 15:36:53,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591571999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:53,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:53,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:36:53,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431443365] [2023-11-17 15:36:53,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:53,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:53,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:53,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:53,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 352 [2023-11-17 15:36:53,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 48 transitions, 112 flow. Second operand has 3 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 15:36:53,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:53,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 352 [2023-11-17 15:36:53,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:54,211 INFO L124 PetriNetUnfolderBase]: 2025/3419 cut-off events. [2023-11-17 15:36:54,212 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-11-17 15:36:54,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6804 conditions, 3419 events. 2025/3419 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 18121 event pairs, 856 based on Foata normal form. 106/2978 useless extension candidates. Maximal degree in co-relation 2502. Up to 1665 conditions per place. [2023-11-17 15:36:54,227 INFO L140 encePairwiseOnDemand]: 334/352 looper letters, 53 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-11-17 15:36:54,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 62 transitions, 262 flow [2023-11-17 15:36:54,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-11-17 15:36:54,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668560606060606 [2023-11-17 15:36:54,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-11-17 15:36:54,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-11-17 15:36:54,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:54,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-11-17 15:36:54,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 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 15:36:54,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 15:36:54,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 15:36:54,240 INFO L175 Difference]: Start difference. First operand has 38 places, 48 transitions, 112 flow. Second operand 3 states and 493 transitions. [2023-11-17 15:36:54,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 62 transitions, 262 flow [2023-11-17 15:36:54,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:54,243 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 130 flow [2023-11-17 15:36:54,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-11-17 15:36:54,244 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-11-17 15:36:54,244 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 130 flow [2023-11-17 15:36:54,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 15:36:54,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:54,245 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:36:54,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:36:54,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:36:54,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1905885797, now seen corresponding path program 1 times [2023-11-17 15:36:54,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:54,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34112263] [2023-11-17 15:36:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:54,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:54,262 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:54,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:54,276 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:54,276 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:36:54,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:36:54,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:36:54,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:36:54,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:36:54,277 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:36:54,278 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:54,278 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:36:54,293 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:36:54,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 205 transitions, 437 flow [2023-11-17 15:36:54,340 INFO L124 PetriNetUnfolderBase]: 65/538 cut-off events. [2023-11-17 15:36:54,341 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:36:54,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 538 events. 65/538 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2238 event pairs, 1 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 377. Up to 16 conditions per place. [2023-11-17 15:36:54,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 205 transitions, 437 flow [2023-11-17 15:36:54,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 205 transitions, 437 flow [2023-11-17 15:36:54,348 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:54,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 205 transitions, 437 flow [2023-11-17 15:36:54,349 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 205 transitions, 437 flow [2023-11-17 15:36:54,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 205 transitions, 437 flow [2023-11-17 15:36:54,393 INFO L124 PetriNetUnfolderBase]: 65/538 cut-off events. [2023-11-17 15:36:54,393 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:36:54,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 538 events. 65/538 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2238 event pairs, 1 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 377. Up to 16 conditions per place. [2023-11-17 15:36:54,411 INFO L119 LiptonReduction]: Number of co-enabled transitions 17136 [2023-11-17 15:36:57,987 INFO L134 LiptonReduction]: Checked pairs total: 26332 [2023-11-17 15:36:57,987 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-11-17 15:36:57,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:57,991 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;@391b93eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:57,991 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:36:57,994 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:57,994 INFO L124 PetriNetUnfolderBase]: 8/29 cut-off events. [2023-11-17 15:36:57,994 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:36:57,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:57,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:36:57,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:36:57,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash -824345434, now seen corresponding path program 1 times [2023-11-17 15:36:57,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:57,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373181827] [2023-11-17 15:36:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:57,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:58,071 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 15:36:58,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:58,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373181827] [2023-11-17 15:36:58,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373181827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:58,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:58,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:36:58,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359071542] [2023-11-17 15:36:58,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:58,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:58,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:58,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:58,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 404 [2023-11-17 15:36:58,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 59 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 15:36:58,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:58,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 404 [2023-11-17 15:36:58,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:00,344 INFO L124 PetriNetUnfolderBase]: 20351/29676 cut-off events. [2023-11-17 15:37:00,344 INFO L125 PetriNetUnfolderBase]: For 842/842 co-relation queries the response was YES. [2023-11-17 15:37:00,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59225 conditions, 29676 events. 20351/29676 cut-off events. For 842/842 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 178007 event pairs, 9022 based on Foata normal form. 698/25878 useless extension candidates. Maximal degree in co-relation 6391. Up to 16734 conditions per place. [2023-11-17 15:37:00,518 INFO L140 encePairwiseOnDemand]: 383/404 looper letters, 68 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-11-17 15:37:00,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 332 flow [2023-11-17 15:37:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:00,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-11-17 15:37:00,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612211221122112 [2023-11-17 15:37:00,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-11-17 15:37:00,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-11-17 15:37:00,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:00,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-11-17 15:37:00,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 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 15:37:00,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 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 15:37:00,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 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 15:37:00,526 INFO L175 Difference]: Start difference. First operand has 47 places, 59 transitions, 145 flow. Second operand 3 states and 559 transitions. [2023-11-17 15:37:00,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 332 flow [2023-11-17 15:37:00,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:00,535 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 151 flow [2023-11-17 15:37:00,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-11-17 15:37:00,544 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-11-17 15:37:00,545 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 151 flow [2023-11-17 15:37:00,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 15:37:00,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:00,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:00,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:37:00,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:37:00,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:00,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1114991081, now seen corresponding path program 1 times [2023-11-17 15:37:00,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:00,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670125656] [2023-11-17 15:37:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:00,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:00,611 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 15:37:00,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:00,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670125656] [2023-11-17 15:37:00,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670125656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:37:00,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731574677] [2023-11-17 15:37:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:00,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:37:00,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:00,619 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 15:37:00,627 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 15:37:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:00,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:37:00,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:37:00,757 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 15:37:00,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:37:00,780 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 15:37:00,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731574677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:37:00,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:37:00,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:37:00,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394525898] [2023-11-17 15:37:00,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:37:00,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:37:00,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:00,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:37:00,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:37:00,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 404 [2023-11-17 15:37:00,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 151 flow. Second operand has 7 states, 7 states have (on average 153.85714285714286) internal successors, (1077), 7 states have internal predecessors, (1077), 0 states have call successors, (0), 0 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 15:37:00,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:00,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 404 [2023-11-17 15:37:00,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:01,077 INFO L124 PetriNetUnfolderBase]: 1600/2635 cut-off events. [2023-11-17 15:37:01,077 INFO L125 PetriNetUnfolderBase]: For 834/834 co-relation queries the response was YES. [2023-11-17 15:37:01,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5292 conditions, 2635 events. 1600/2635 cut-off events. For 834/834 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13524 event pairs, 0 based on Foata normal form. 0/2634 useless extension candidates. Maximal degree in co-relation 5281. Up to 1512 conditions per place. [2023-11-17 15:37:01,092 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 52 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-11-17 15:37:01,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 58 transitions, 254 flow [2023-11-17 15:37:01,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:37:01,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:37:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 966 transitions. [2023-11-17 15:37:01,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39851485148514854 [2023-11-17 15:37:01,096 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 966 transitions. [2023-11-17 15:37:01,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 966 transitions. [2023-11-17 15:37:01,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:01,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 966 transitions. [2023-11-17 15:37:01,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 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 15:37:01,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 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 15:37:01,103 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 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 15:37:01,103 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 151 flow. Second operand 6 states and 966 transitions. [2023-11-17 15:37:01,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 58 transitions, 254 flow [2023-11-17 15:37:01,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 58 transitions, 245 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-17 15:37:01,109 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 75 flow [2023-11-17 15:37:01,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, 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=6, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-11-17 15:37:01,111 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -11 predicate places. [2023-11-17 15:37:01,111 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 75 flow [2023-11-17 15:37:01,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.85714285714286) internal successors, (1077), 7 states have internal predecessors, (1077), 0 states have call successors, (0), 0 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 15:37:01,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:01,112 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:37:01,124 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 15:37:01,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 15:37:01,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:37:01,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:01,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1547401187, now seen corresponding path program 1 times [2023-11-17 15:37:01,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:01,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777053423] [2023-11-17 15:37:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:01,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:01,334 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:01,363 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:01,363 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:01,364 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:37:01,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:37:01,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:37:01,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:37:01,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:37:01,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:37:01,369 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:37:01,370 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:01,370 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:37:01,399 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:37:01,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 231 transitions, 502 flow [2023-11-17 15:37:01,489 INFO L124 PetriNetUnfolderBase]: 99/779 cut-off events. [2023-11-17 15:37:01,490 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:37:01,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 779 events. 99/779 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3536 event pairs, 6 based on Foata normal form. 0/676 useless extension candidates. Maximal degree in co-relation 558. Up to 32 conditions per place. [2023-11-17 15:37:01,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 231 transitions, 502 flow [2023-11-17 15:37:01,503 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 231 transitions, 502 flow [2023-11-17 15:37:01,503 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:01,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 231 transitions, 502 flow [2023-11-17 15:37:01,504 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 231 transitions, 502 flow [2023-11-17 15:37:01,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 231 transitions, 502 flow [2023-11-17 15:37:01,577 INFO L124 PetriNetUnfolderBase]: 99/779 cut-off events. [2023-11-17 15:37:01,577 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:37:01,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 779 events. 99/779 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3536 event pairs, 6 based on Foata normal form. 0/676 useless extension candidates. Maximal degree in co-relation 558. Up to 32 conditions per place. [2023-11-17 15:37:01,605 INFO L119 LiptonReduction]: Number of co-enabled transitions 25440 [2023-11-17 15:37:05,736 INFO L134 LiptonReduction]: Checked pairs total: 39331 [2023-11-17 15:37:05,736 INFO L136 LiptonReduction]: Total number of compositions: 224 [2023-11-17 15:37:05,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:05,739 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;@391b93eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:05,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:37:05,742 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:05,742 INFO L124 PetriNetUnfolderBase]: 10/32 cut-off events. [2023-11-17 15:37:05,742 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:05,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:05,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:37:05,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:37:05,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:05,743 INFO L85 PathProgramCache]: Analyzing trace with hash 478957166, now seen corresponding path program 1 times [2023-11-17 15:37:05,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:05,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076697488] [2023-11-17 15:37:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:05,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:05,805 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 15:37:05,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:05,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076697488] [2023-11-17 15:37:05,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076697488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:05,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:05,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:37:05,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110879780] [2023-11-17 15:37:05,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:05,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:05,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:05,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:05,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 455 [2023-11-17 15:37:05,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 69 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 15:37:05,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:05,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 455 [2023-11-17 15:37:05,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:24,150 INFO L124 PetriNetUnfolderBase]: 218828/296451 cut-off events. [2023-11-17 15:37:24,150 INFO L125 PetriNetUnfolderBase]: For 9819/9819 co-relation queries the response was YES. [2023-11-17 15:37:24,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592998 conditions, 296451 events. 218828/296451 cut-off events. For 9819/9819 co-relation queries the response was YES. Maximal size of possible extension queue 5247. Compared 2005254 event pairs, 103710 based on Foata normal form. 5247/262665 useless extension candidates. Maximal degree in co-relation 63616. Up to 146282 conditions per place. [2023-11-17 15:37:25,841 INFO L140 encePairwiseOnDemand]: 429/455 looper letters, 80 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-11-17 15:37:25,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 90 transitions, 404 flow [2023-11-17 15:37:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-11-17 15:37:25,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564102564102564 [2023-11-17 15:37:25,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-11-17 15:37:25,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-11-17 15:37:25,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:25,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-11-17 15:37:25,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 15:37:25,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 0 states have call successors, (0), 0 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 15:37:25,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 0 states have call successors, (0), 0 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 15:37:25,854 INFO L175 Difference]: Start difference. First operand has 56 places, 69 transitions, 178 flow. Second operand 3 states and 623 transitions. [2023-11-17 15:37:25,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 90 transitions, 404 flow [2023-11-17 15:37:25,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:25,860 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 198 flow [2023-11-17 15:37:25,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2023-11-17 15:37:25,862 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-11-17 15:37:25,862 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 198 flow [2023-11-17 15:37:25,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 15:37:25,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:25,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:25,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:37:25,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:37:25,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:25,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2068353401, now seen corresponding path program 1 times [2023-11-17 15:37:25,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:25,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814697826] [2023-11-17 15:37:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:25,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:25,942 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 15:37:25,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:25,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814697826] [2023-11-17 15:37:25,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814697826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:37:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587670837] [2023-11-17 15:37:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:25,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:37:25,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:25,944 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 15:37:25,947 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 15:37:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:26,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:37:26,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:37:26,055 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 15:37:26,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:37:26,074 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 15:37:26,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587670837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:37:26,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:37:26,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:37:26,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394653039] [2023-11-17 15:37:26,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:37:26,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:37:26,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:37:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:37:26,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 455 [2023-11-17 15:37:26,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 169.85714285714286) internal successors, (1189), 7 states have internal predecessors, (1189), 0 states have call successors, (0), 0 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 15:37:26,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:26,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 455 [2023-11-17 15:37:26,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:42,079 INFO L124 PetriNetUnfolderBase]: 204620/279906 cut-off events. [2023-11-17 15:37:42,079 INFO L125 PetriNetUnfolderBase]: For 71752/71752 co-relation queries the response was YES. [2023-11-17 15:37:42,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626929 conditions, 279906 events. 204620/279906 cut-off events. For 71752/71752 co-relation queries the response was YES. Maximal size of possible extension queue 4959. Compared 1896783 event pairs, 30090 based on Foata normal form. 0/261708 useless extension candidates. Maximal degree in co-relation 149049. Up to 259035 conditions per place. [2023-11-17 15:37:43,594 INFO L140 encePairwiseOnDemand]: 451/455 looper letters, 105 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2023-11-17 15:37:43,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 115 transitions, 548 flow [2023-11-17 15:37:43,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:37:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:37:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1112 transitions. [2023-11-17 15:37:43,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073260073260073 [2023-11-17 15:37:43,600 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1112 transitions. [2023-11-17 15:37:43,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1112 transitions. [2023-11-17 15:37:43,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:43,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1112 transitions. [2023-11-17 15:37:43,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 0 states have call successors, (0), 0 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 15:37:43,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 0 states have call successors, (0), 0 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 15:37:43,607 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 0 states have call successors, (0), 0 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 15:37:43,607 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 198 flow. Second operand 6 states and 1112 transitions. [2023-11-17 15:37:43,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 115 transitions, 548 flow [2023-11-17 15:37:43,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 115 transitions, 536 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:37:43,819 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 228 flow [2023-11-17 15:37:43,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-11-17 15:37:43,819 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-11-17 15:37:43,819 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 228 flow [2023-11-17 15:37:43,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 169.85714285714286) internal successors, (1189), 7 states have internal predecessors, (1189), 0 states have call successors, (0), 0 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 15:37:43,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:43,820 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:43,827 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 15:37:44,026 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,SelfDestructingSolverStorable8 [2023-11-17 15:37:44,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:37:44,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:44,027 INFO L85 PathProgramCache]: Analyzing trace with hash 422482104, now seen corresponding path program 1 times [2023-11-17 15:37:44,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:44,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517946660] [2023-11-17 15:37:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:44,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:44,056 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:44,079 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:44,079 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:44,080 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:37:44,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:37:44,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:37:44,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:37:44,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:37:44,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:37:44,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:37:44,081 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:37:44,082 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:44,083 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:37:44,113 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 15:37:44,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 257 transitions, 569 flow [2023-11-17 15:37:44,239 INFO L124 PetriNetUnfolderBase]: 161/1168 cut-off events. [2023-11-17 15:37:44,239 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:37:44,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1168 events. 161/1168 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 5944 event pairs, 23 based on Foata normal form. 0/1018 useless extension candidates. Maximal degree in co-relation 824. Up to 80 conditions per place. [2023-11-17 15:37:44,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 257 transitions, 569 flow [2023-11-17 15:37:44,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 257 transitions, 569 flow [2023-11-17 15:37:44,261 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:44,261 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 257 transitions, 569 flow [2023-11-17 15:37:44,261 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 257 transitions, 569 flow [2023-11-17 15:37:44,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 257 transitions, 569 flow [2023-11-17 15:37:44,382 INFO L124 PetriNetUnfolderBase]: 161/1168 cut-off events. [2023-11-17 15:37:44,382 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:37:44,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1168 events. 161/1168 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 5944 event pairs, 23 based on Foata normal form. 0/1018 useless extension candidates. Maximal degree in co-relation 824. Up to 80 conditions per place. [2023-11-17 15:37:44,425 INFO L119 LiptonReduction]: Number of co-enabled transitions 35040 [2023-11-17 15:37:48,485 INFO L134 LiptonReduction]: Checked pairs total: 54871 [2023-11-17 15:37:48,485 INFO L136 LiptonReduction]: Total number of compositions: 250 [2023-11-17 15:37:48,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:48,487 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;@391b93eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:48,487 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:37:48,488 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:48,489 INFO L124 PetriNetUnfolderBase]: 9/31 cut-off events. [2023-11-17 15:37:48,489 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:48,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:48,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:37:48,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:37:48,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash -907938444, now seen corresponding path program 1 times [2023-11-17 15:37:48,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:48,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915055657] [2023-11-17 15:37:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:48,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:48,531 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 15:37:48,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:48,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915055657] [2023-11-17 15:37:48,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915055657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:48,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:48,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:37:48,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975034428] [2023-11-17 15:37:48,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:48,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:48,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:48,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:48,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:48,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 507 [2023-11-17 15:37:48,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 80 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 15:37:48,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:48,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 507 [2023-11-17 15:37:48,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand