/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_27-funptr_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:37:20,830 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:37:20,894 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 15:37:20,920 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:37:20,920 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:37:20,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:37:20,921 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:37:20,922 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:37:20,922 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:37:20,925 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:37:20,926 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:37:20,926 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:37:20,926 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:37:20,927 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:37:20,927 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:37:20,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:37:20,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:37:20,928 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:37:20,928 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:37:20,928 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:37:20,929 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:37:20,929 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:37:20,929 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:37:20,930 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:37:20,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:37:20,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:37:20,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:37:20,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:37:20,932 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:37:20,932 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:37:20,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:37:20,933 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:37:20,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:37:21,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:37:21,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:37:21,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:37:21,147 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:37:21,148 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:37:21,149 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-11-17 15:37:22,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:37:22,512 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:37:22,514 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-11-17 15:37:22,531 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c12e6a799/67cbe6ed7b5e43bda2b219aa9b419e0c/FLAG16ed7aed9 [2023-11-17 15:37:22,544 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c12e6a799/67cbe6ed7b5e43bda2b219aa9b419e0c [2023-11-17 15:37:22,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:37:22,547 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:37:22,549 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:37:22,549 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:37:22,552 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:37:22,553 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:22" (1/1) ... [2023-11-17 15:37:22,553 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59aaadab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:22, skipping insertion in model container [2023-11-17 15:37:22,554 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:22" (1/1) ... [2023-11-17 15:37:22,599 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:37:22,886 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_27-funptr_racing.i[41323,41336] [2023-11-17 15:37:22,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:37:22,919 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:37:22,959 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_27-funptr_racing.i[41323,41336] [2023-11-17 15:37:22,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:37:23,001 WARN L675 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:37:23,006 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:37:23,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23 WrapperNode [2023-11-17 15:37:23,006 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:37:23,007 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:37:23,007 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:37:23,007 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:37:23,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,055 INFO L138 Inliner]: procedures = 274, calls = 52, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 176 [2023-11-17 15:37:23,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:37:23,056 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:37:23,056 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:37:23,056 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:37:23,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,065 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,065 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,070 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,073 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,074 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,076 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:37:23,077 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:37:23,077 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:37:23,077 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:37:23,077 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:37:23,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:23,101 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 15:37:23,119 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 15:37:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:37:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:37:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:37:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:37:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:37:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:37:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:37:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:37:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:37:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:37:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:37:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:37:23,126 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 15:37:23,220 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:37:23,221 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:37:23,428 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:37:23,459 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:37:23,459 INFO L307 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-17 15:37:23,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:37:23 BoogieIcfgContainer [2023-11-17 15:37:23,460 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:37:23,462 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:37:23,462 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:37:23,464 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:37:23,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:37:22" (1/3) ... [2023-11-17 15:37:23,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a7340f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:23, skipping insertion in model container [2023-11-17 15:37:23,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (2/3) ... [2023-11-17 15:37:23,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a7340f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:23, skipping insertion in model container [2023-11-17 15:37:23,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:37:23" (3/3) ... [2023-11-17 15:37:23,465 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-11-17 15:37:23,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:37:23,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:37:23,476 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:37:23,531 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:37:23,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 159 transitions, 325 flow [2023-11-17 15:37:23,612 INFO L124 PetriNetUnfolderBase]: 24/204 cut-off events. [2023-11-17 15:37:23,612 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:23,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 204 events. 24/204 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 613 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 119. Up to 4 conditions per place. [2023-11-17 15:37:23,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 159 transitions, 325 flow [2023-11-17 15:37:23,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 154 transitions, 312 flow [2023-11-17 15:37:23,632 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:23,639 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 154 transitions, 312 flow [2023-11-17 15:37:23,641 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 154 transitions, 312 flow [2023-11-17 15:37:23,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 154 transitions, 312 flow [2023-11-17 15:37:23,664 INFO L124 PetriNetUnfolderBase]: 23/199 cut-off events. [2023-11-17 15:37:23,664 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:23,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 199 events. 23/199 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 591 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 119. Up to 4 conditions per place. [2023-11-17 15:37:23,668 INFO L119 LiptonReduction]: Number of co-enabled transitions 7038 [2023-11-17 15:37:26,838 INFO L134 LiptonReduction]: Checked pairs total: 11348 [2023-11-17 15:37:26,838 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-11-17 15:37:26,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:26,859 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;@58f26df0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:26,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:26,864 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:26,864 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-11-17 15:37:26,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:26,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:26,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:37:26,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:26,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:26,869 INFO L85 PathProgramCache]: Analyzing trace with hash -606881119, now seen corresponding path program 1 times [2023-11-17 15:37:26,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:26,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847851370] [2023-11-17 15:37:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:26,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:26,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:26,988 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:26,989 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:26,990 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:26,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:26,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:37:26,992 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:37:26,994 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:26,994 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:37:27,016 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:37:27,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 230 transitions, 476 flow [2023-11-17 15:37:27,061 INFO L124 PetriNetUnfolderBase]: 45/346 cut-off events. [2023-11-17 15:37:27,062 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:37:27,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 346 events. 45/346 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1298 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-11-17 15:37:27,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 230 transitions, 476 flow [2023-11-17 15:37:27,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 230 transitions, 476 flow [2023-11-17 15:37:27,069 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:27,069 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 230 transitions, 476 flow [2023-11-17 15:37:27,070 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 230 transitions, 476 flow [2023-11-17 15:37:27,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 230 transitions, 476 flow [2023-11-17 15:37:27,106 INFO L124 PetriNetUnfolderBase]: 45/346 cut-off events. [2023-11-17 15:37:27,107 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:37:27,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 346 events. 45/346 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1298 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-11-17 15:37:27,121 INFO L119 LiptonReduction]: Number of co-enabled transitions 25116 [2023-11-17 15:37:30,704 INFO L134 LiptonReduction]: Checked pairs total: 56519 [2023-11-17 15:37:30,704 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-11-17 15:37:30,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:30,707 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;@58f26df0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:30,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:30,709 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:30,709 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-17 15:37:30,709 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:30,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:30,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:30,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:30,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:30,710 INFO L85 PathProgramCache]: Analyzing trace with hash -418507651, now seen corresponding path program 1 times [2023-11-17 15:37:30,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:30,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336273828] [2023-11-17 15:37:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:30,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:30,790 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 15:37:30,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:30,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336273828] [2023-11-17 15:37:30,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336273828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:30,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:30,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:37:30,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616492079] [2023-11-17 15:37:30,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:30,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:30,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:30,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:30,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 428 [2023-11-17 15:37:30,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 99 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:30,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:30,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 428 [2023-11-17 15:37:30,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:31,814 INFO L124 PetriNetUnfolderBase]: 8608/14486 cut-off events. [2023-11-17 15:37:31,815 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-17 15:37:31,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27805 conditions, 14486 events. 8608/14486 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 106939 event pairs, 4620 based on Foata normal form. 1018/13914 useless extension candidates. Maximal degree in co-relation 2847. Up to 13206 conditions per place. [2023-11-17 15:37:31,860 INFO L140 encePairwiseOnDemand]: 398/428 looper letters, 63 selfloop transitions, 2 changer transitions 9/91 dead transitions. [2023-11-17 15:37:31,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 344 flow [2023-11-17 15:37:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-11-17 15:37:31,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45482866043613707 [2023-11-17 15:37:31,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-11-17 15:37:31,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-11-17 15:37:31,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:31,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-11-17 15:37:31,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 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 15:37:31,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 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 15:37:31,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 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 15:37:31,889 INFO L175 Difference]: Start difference. First operand has 73 places, 99 transitions, 214 flow. Second operand 3 states and 584 transitions. [2023-11-17 15:37:31,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 344 flow [2023-11-17 15:37:31,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 344 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:31,897 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 148 flow [2023-11-17 15:37:31,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2023-11-17 15:37:31,900 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-11-17 15:37:31,900 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 148 flow [2023-11-17 15:37:31,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:31,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:31,901 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:37:31,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:37:31,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:31,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash 711821397, now seen corresponding path program 1 times [2023-11-17 15:37:31,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:31,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669786011] [2023-11-17 15:37:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:31,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:31,934 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:31,963 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:31,963 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:31,963 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:31,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:31,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:37:31,964 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:37:31,964 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:31,964 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:37:32,050 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:37:32,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 301 transitions, 629 flow [2023-11-17 15:37:32,103 INFO L124 PetriNetUnfolderBase]: 71/523 cut-off events. [2023-11-17 15:37:32,103 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:37:32,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 523 events. 71/523 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2155 event pairs, 1 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 354. Up to 16 conditions per place. [2023-11-17 15:37:32,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 301 transitions, 629 flow [2023-11-17 15:37:32,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 301 transitions, 629 flow [2023-11-17 15:37:32,114 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:32,114 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 301 transitions, 629 flow [2023-11-17 15:37:32,115 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 301 transitions, 629 flow [2023-11-17 15:37:32,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 301 transitions, 629 flow [2023-11-17 15:37:32,161 INFO L124 PetriNetUnfolderBase]: 71/523 cut-off events. [2023-11-17 15:37:32,161 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:37:32,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 523 events. 71/523 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2155 event pairs, 1 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 354. Up to 16 conditions per place. [2023-11-17 15:37:32,184 INFO L119 LiptonReduction]: Number of co-enabled transitions 52578 [2023-11-17 15:37:36,313 INFO L134 LiptonReduction]: Checked pairs total: 123396 [2023-11-17 15:37:36,314 INFO L136 LiptonReduction]: Total number of compositions: 256 [2023-11-17 15:37:36,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:36,321 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;@58f26df0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:36,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:36,324 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:36,324 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 15:37:36,324 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:36,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:36,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:36,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:36,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:36,325 INFO L85 PathProgramCache]: Analyzing trace with hash 332891171, now seen corresponding path program 1 times [2023-11-17 15:37:36,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:36,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072359552] [2023-11-17 15:37:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:36,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:36,392 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 15:37:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:36,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072359552] [2023-11-17 15:37:36,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072359552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:36,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:36,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:37:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038471681] [2023-11-17 15:37:36,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:36,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:36,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:36,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:36,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 557 [2023-11-17 15:37:36,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 138 transitions, 303 flow. Second operand has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 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 15:37:36,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:36,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 557 [2023-11-17 15:37:36,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:38:00,324 INFO L124 PetriNetUnfolderBase]: 253372/374667 cut-off events. [2023-11-17 15:38:00,324 INFO L125 PetriNetUnfolderBase]: For 4222/4222 co-relation queries the response was YES. [2023-11-17 15:38:01,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719769 conditions, 374667 events. 253372/374667 cut-off events. For 4222/4222 co-relation queries the response was YES. Maximal size of possible extension queue 9246. Compared 3325250 event pairs, 155371 based on Foata normal form. 28878/365899 useless extension candidates. Maximal degree in co-relation 32233. Up to 342493 conditions per place. [2023-11-17 15:38:01,909 INFO L140 encePairwiseOnDemand]: 515/557 looper letters, 85 selfloop transitions, 2 changer transitions 10/120 dead transitions. [2023-11-17 15:38:01,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 120 transitions, 459 flow [2023-11-17 15:38:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:38:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:38:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 754 transitions. [2023-11-17 15:38:01,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512268102932376 [2023-11-17 15:38:01,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 754 transitions. [2023-11-17 15:38:01,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 754 transitions. [2023-11-17 15:38:01,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:38:01,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 754 transitions. [2023-11-17 15:38:01,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 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 15:38:01,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 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 15:38:01,917 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 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 15:38:01,917 INFO L175 Difference]: Start difference. First operand has 100 places, 138 transitions, 303 flow. Second operand 3 states and 754 transitions. [2023-11-17 15:38:01,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 120 transitions, 459 flow [2023-11-17 15:38:01,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 120 transitions, 459 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:38:01,922 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 208 flow [2023-11-17 15:38:01,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2023-11-17 15:38:01,923 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, 3 predicate places. [2023-11-17 15:38:01,923 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 208 flow [2023-11-17 15:38:01,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 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 15:38:01,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:01,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:38:01,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:38:01,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:38:01,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:01,924 INFO L85 PathProgramCache]: Analyzing trace with hash 88097187, now seen corresponding path program 1 times [2023-11-17 15:38:01,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:01,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509115108] [2023-11-17 15:38:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:01,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:01,959 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 15:38:01,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:01,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509115108] [2023-11-17 15:38:01,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509115108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:38:01,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235202716] [2023-11-17 15:38:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:01,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:38:01,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:38:01,962 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 15:38:01,967 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 15:38:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:02,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:38:02,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:38:02,104 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 15:38:02,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:38:02,119 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 15:38:02,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235202716] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:38:02,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:38:02,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:38:02,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072304655] [2023-11-17 15:38:02,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:38:02,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:38:02,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:38:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:38:02,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 557 [2023-11-17 15:38:02,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 204.71428571428572) internal successors, (1433), 7 states have internal predecessors, (1433), 0 states have call successors, (0), 0 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 15:38:02,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:02,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 557 [2023-11-17 15:38:02,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:38:06,578 INFO L124 PetriNetUnfolderBase]: 48432/76238 cut-off events. [2023-11-17 15:38:06,578 INFO L125 PetriNetUnfolderBase]: For 24681/24681 co-relation queries the response was YES. [2023-11-17 15:38:06,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150826 conditions, 76238 events. 48432/76238 cut-off events. For 24681/24681 co-relation queries the response was YES. Maximal size of possible extension queue 2392. Compared 649465 event pairs, 646 based on Foata normal form. 6156/79313 useless extension candidates. Maximal degree in co-relation 9874. Up to 46208 conditions per place. [2023-11-17 15:38:06,983 INFO L140 encePairwiseOnDemand]: 554/557 looper letters, 172 selfloop transitions, 4 changer transitions 0/199 dead transitions. [2023-11-17 15:38:06,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 199 transitions, 778 flow [2023-11-17 15:38:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:38:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:38:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1391 transitions. [2023-11-17 15:38:06,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4162178336325554 [2023-11-17 15:38:06,986 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1391 transitions. [2023-11-17 15:38:06,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1391 transitions. [2023-11-17 15:38:06,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:38:06,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1391 transitions. [2023-11-17 15:38:06,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.83333333333334) internal successors, (1391), 6 states have internal predecessors, (1391), 0 states have call successors, (0), 0 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 15:38:06,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 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 15:38:06,996 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 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 15:38:06,996 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 208 flow. Second operand 6 states and 1391 transitions. [2023-11-17 15:38:06,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 199 transitions, 778 flow [2023-11-17 15:38:07,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 199 transitions, 774 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:38:07,007 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 202 flow [2023-11-17 15:38:07,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2023-11-17 15:38:07,009 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -6 predicate places. [2023-11-17 15:38:07,009 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 202 flow [2023-11-17 15:38:07,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.71428571428572) internal successors, (1433), 7 states have internal predecessors, (1433), 0 states have call successors, (0), 0 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 15:38:07,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:07,010 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:38:07,029 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 15:38:07,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:38:07,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:38:07,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:07,235 INFO L85 PathProgramCache]: Analyzing trace with hash -468282238, now seen corresponding path program 1 times [2023-11-17 15:38:07,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:07,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574034082] [2023-11-17 15:38:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:07,260 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:38:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:07,288 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:38:07,288 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:38:07,289 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:38:07,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:38:07,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:38:07,289 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:38:07,290 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:38:07,290 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:38:07,338 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:38:07,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 372 transitions, 784 flow [2023-11-17 15:38:07,443 INFO L124 PetriNetUnfolderBase]: 109/772 cut-off events. [2023-11-17 15:38:07,443 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:38:07,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 772 events. 109/772 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3438 event pairs, 6 based on Foata normal form. 0/658 useless extension candidates. Maximal degree in co-relation 543. Up to 32 conditions per place. [2023-11-17 15:38:07,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 372 transitions, 784 flow [2023-11-17 15:38:07,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 372 transitions, 784 flow [2023-11-17 15:38:07,462 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:38:07,462 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 372 transitions, 784 flow [2023-11-17 15:38:07,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 372 transitions, 784 flow [2023-11-17 15:38:07,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 372 transitions, 784 flow [2023-11-17 15:38:07,648 INFO L124 PetriNetUnfolderBase]: 109/772 cut-off events. [2023-11-17 15:38:07,648 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:38:07,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 772 events. 109/772 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3438 event pairs, 6 based on Foata normal form. 0/658 useless extension candidates. Maximal degree in co-relation 543. Up to 32 conditions per place. [2023-11-17 15:38:07,680 INFO L119 LiptonReduction]: Number of co-enabled transitions 89976 [2023-11-17 15:38:12,850 INFO L134 LiptonReduction]: Checked pairs total: 213075 [2023-11-17 15:38:12,850 INFO L136 LiptonReduction]: Total number of compositions: 317 [2023-11-17 15:38:12,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:38:12,852 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;@58f26df0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:38:12,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:38:12,853 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:38:12,854 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 15:38:12,854 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:38:12,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:12,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:38:12,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:38:12,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:12,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1049299219, now seen corresponding path program 1 times [2023-11-17 15:38:12,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:12,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522861896] [2023-11-17 15:38:12,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:12,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:12,875 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 15:38:12,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:12,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522861896] [2023-11-17 15:38:12,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522861896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:38:12,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:38:12,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:38:12,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212944854] [2023-11-17 15:38:12,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:38:12,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:38:12,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:12,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:38:12,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:38:12,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 689 [2023-11-17 15:38:12,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 177 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 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 15:38:12,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:12,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 689 [2023-11-17 15:38:12,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand