/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/pthread-ext/03_incdec-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:05:44,028 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:05:44,087 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 15:05:44,116 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:05:44,117 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:05:44,117 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:05:44,117 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:05:44,118 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:05:44,118 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:05:44,121 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:05:44,121 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:05:44,121 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:05:44,122 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:05:44,122 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:05:44,123 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:05:44,123 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:05:44,123 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:05:44,123 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:05:44,123 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:05:44,123 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:05:44,123 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:05:44,127 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:05:44,127 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:05:44,127 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:05:44,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:05:44,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:05:44,127 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:05:44,127 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:05:44,128 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:05:44,128 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:05:44,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:05:44,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:05:44,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:05:44,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:05:44,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:05:44,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:05:44,329 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:05:44,329 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:05:44,330 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/03_incdec-pthread.i [2023-11-17 15:05:45,254 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:05:45,413 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:05:45,414 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec-pthread.i [2023-11-17 15:05:45,424 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f3468295/c78ca401ac7149b9b83da8956f4bedff/FLAGf3c88ce0e [2023-11-17 15:05:45,433 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f3468295/c78ca401ac7149b9b83da8956f4bedff [2023-11-17 15:05:45,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:05:45,436 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:05:45,437 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:05:45,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:05:45,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:05:45,440 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f707047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45, skipping insertion in model container [2023-11-17 15:05:45,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,473 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:05:45,693 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec-pthread.i[30745,30758] [2023-11-17 15:05:45,701 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec-pthread.i[31120,31133] [2023-11-17 15:05:45,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:05:45,719 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:05:45,755 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec-pthread.i[30745,30758] [2023-11-17 15:05:45,757 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec-pthread.i[31120,31133] [2023-11-17 15:05:45,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:05:45,786 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:05:45,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45 WrapperNode [2023-11-17 15:05:45,786 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:05:45,787 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:05:45,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:05:45,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:05:45,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,802 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,825 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 99 [2023-11-17 15:05:45,826 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:05:45,826 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:05:45,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:05:45,826 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:05:45,832 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,834 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,834 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,837 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,850 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,851 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,854 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:05:45,855 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:05:45,855 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:05:45,855 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:05:45,855 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (1/1) ... [2023-11-17 15:05:45,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:05:45,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:05:45,885 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 15:05:45,896 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 15:05:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:05:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:05:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:05:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:05:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:05:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:05:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:05:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:05:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:05:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:05:45,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:05:45,916 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 15:05:46,043 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:05:46,044 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:05:46,225 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:05:46,251 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:05:46,251 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 15:05:46,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:05:46 BoogieIcfgContainer [2023-11-17 15:05:46,253 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:05:46,254 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:05:46,254 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:05:46,256 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:05:46,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:05:45" (1/3) ... [2023-11-17 15:05:46,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea05654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:05:46, skipping insertion in model container [2023-11-17 15:05:46,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:45" (2/3) ... [2023-11-17 15:05:46,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea05654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:05:46, skipping insertion in model container [2023-11-17 15:05:46,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:05:46" (3/3) ... [2023-11-17 15:05:46,258 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec-pthread.i [2023-11-17 15:05:46,272 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:05:46,272 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 15:05:46,273 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:05:46,335 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:05:46,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 99 transitions, 202 flow [2023-11-17 15:05:46,394 INFO L124 PetriNetUnfolderBase]: 7/110 cut-off events. [2023-11-17 15:05:46,394 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:46,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 110 events. 7/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 201 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-17 15:05:46,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 99 transitions, 202 flow [2023-11-17 15:05:46,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 99 transitions, 202 flow [2023-11-17 15:05:46,405 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:05:46,414 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 99 transitions, 202 flow [2023-11-17 15:05:46,416 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 99 transitions, 202 flow [2023-11-17 15:05:46,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 99 transitions, 202 flow [2023-11-17 15:05:46,434 INFO L124 PetriNetUnfolderBase]: 7/110 cut-off events. [2023-11-17 15:05:46,434 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:46,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 110 events. 7/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 201 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-17 15:05:46,436 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-11-17 15:05:49,099 INFO L134 LiptonReduction]: Checked pairs total: 1574 [2023-11-17 15:05:49,099 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-11-17 15:05:49,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:05:49,113 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;@e7363ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:05:49,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:05:49,115 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:05:49,115 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:05:49,115 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:49,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:49,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:05:49,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 15:05:49,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:49,119 INFO L85 PathProgramCache]: Analyzing trace with hash 14942849, now seen corresponding path program 1 times [2023-11-17 15:05:49,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:49,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691592195] [2023-11-17 15:05:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:49,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:49,221 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 15:05:49,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:49,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691592195] [2023-11-17 15:05:49,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691592195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:05:49,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:05:49,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:05:49,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528950028] [2023-11-17 15:05:49,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:05:49,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:05:49,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:05:49,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:05:49,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-11-17 15:05:49,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 9 transitions, 22 flow. Second operand has 2 states, 2 states have (on average 84.0) internal successors, (168), 2 states have internal predecessors, (168), 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 15:05:49,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:49,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-11-17 15:05:49,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:05:49,266 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-17 15:05:49,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:49,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-17 15:05:49,267 INFO L140 encePairwiseOnDemand]: 221/224 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-17 15:05:49,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-17 15:05:49,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:05:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:05:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 172 transitions. [2023-11-17 15:05:49,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2023-11-17 15:05:49,275 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 172 transitions. [2023-11-17 15:05:49,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 172 transitions. [2023-11-17 15:05:49,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:05:49,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 172 transitions. [2023-11-17 15:05:49,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 86.0) internal successors, (172), 2 states have internal predecessors, (172), 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 15:05:49,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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 15:05:49,282 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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 15:05:49,283 INFO L175 Difference]: Start difference. First operand has 12 places, 9 transitions, 22 flow. Second operand 2 states and 172 transitions. [2023-11-17 15:05:49,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-17 15:05:49,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:49,285 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-17 15:05:49,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-11-17 15:05:49,288 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -2 predicate places. [2023-11-17 15:05:49,289 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-17 15:05:49,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.0) internal successors, (168), 2 states have internal predecessors, (168), 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 15:05:49,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:49,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:05:49,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:05:49,289 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 15:05:49,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1475108321, now seen corresponding path program 1 times [2023-11-17 15:05:49,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:49,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587361519] [2023-11-17 15:05:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:49,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:49,308 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:05:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:49,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:05:49,332 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:05:49,333 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:05:49,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:05:49,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:05:49,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:05:49,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:05:49,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:05:49,340 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:05:49,342 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:05:49,342 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:05:49,373 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:05:49,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 165 transitions, 340 flow [2023-11-17 15:05:49,423 INFO L124 PetriNetUnfolderBase]: 13/189 cut-off events. [2023-11-17 15:05:49,423 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:05:49,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 189 events. 13/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 608 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-11-17 15:05:49,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 165 transitions, 340 flow [2023-11-17 15:05:49,426 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 165 transitions, 340 flow [2023-11-17 15:05:49,426 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:05:49,426 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 165 transitions, 340 flow [2023-11-17 15:05:49,426 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 165 transitions, 340 flow [2023-11-17 15:05:49,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 165 transitions, 340 flow [2023-11-17 15:05:49,452 INFO L124 PetriNetUnfolderBase]: 13/189 cut-off events. [2023-11-17 15:05:49,452 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:05:49,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 189 events. 13/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 608 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-11-17 15:05:49,458 INFO L119 LiptonReduction]: Number of co-enabled transitions 12220 [2023-11-17 15:05:51,962 INFO L134 LiptonReduction]: Checked pairs total: 53521 [2023-11-17 15:05:51,962 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-11-17 15:05:51,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:05:51,968 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;@e7363ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:05:51,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:05:51,972 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:05:51,972 INFO L124 PetriNetUnfolderBase]: 5/46 cut-off events. [2023-11-17 15:05:51,972 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:05:51,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:51,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:05:51,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 15:05:51,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash 721740340, now seen corresponding path program 1 times [2023-11-17 15:05:51,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:51,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394828150] [2023-11-17 15:05:51,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:51,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:52,073 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 15:05:52,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:52,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394828150] [2023-11-17 15:05:52,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394828150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:05:52,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:05:52,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:05:52,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682919121] [2023-11-17 15:05:52,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:05:52,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:05:52,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:52,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:05:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:05:52,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 343 [2023-11-17 15:05:52,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 58 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 15:05:52,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:52,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 343 [2023-11-17 15:05:52,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:05:52,234 INFO L124 PetriNetUnfolderBase]: 776/1367 cut-off events. [2023-11-17 15:05:52,234 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-17 15:05:52,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2722 conditions, 1367 events. 776/1367 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7824 event pairs, 332 based on Foata normal form. 0/1138 useless extension candidates. Maximal degree in co-relation 1279. Up to 1065 conditions per place. [2023-11-17 15:05:52,243 INFO L140 encePairwiseOnDemand]: 333/343 looper letters, 61 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-11-17 15:05:52,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 71 transitions, 285 flow [2023-11-17 15:05:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:05:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:05:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-11-17 15:05:52,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867832847424684 [2023-11-17 15:05:52,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-11-17 15:05:52,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-11-17 15:05:52,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:05:52,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-11-17 15:05:52,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 15:05:52,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 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 15:05:52,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 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 15:05:52,254 INFO L175 Difference]: Start difference. First operand has 55 places, 58 transitions, 126 flow. Second operand 3 states and 398 transitions. [2023-11-17 15:05:52,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 71 transitions, 285 flow [2023-11-17 15:05:52,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 285 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:52,256 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 145 flow [2023-11-17 15:05:52,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=343, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-11-17 15:05:52,257 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-11-17 15:05:52,257 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 145 flow [2023-11-17 15:05:52,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 15:05:52,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:52,258 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:05:52,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:05:52,258 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 15:05:52,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:52,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2133335734, now seen corresponding path program 1 times [2023-11-17 15:05:52,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:52,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723839814] [2023-11-17 15:05:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:52,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:52,281 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:05:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:52,290 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:05:52,290 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:05:52,290 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 15:05:52,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 15:05:52,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 15:05:52,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 15:05:52,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 15:05:52,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 15:05:52,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 15:05:52,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:05:52,291 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:05:52,291 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:05:52,291 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:05:52,323 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:05:52,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 231 transitions, 480 flow [2023-11-17 15:05:52,348 INFO L124 PetriNetUnfolderBase]: 19/268 cut-off events. [2023-11-17 15:05:52,349 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:05:52,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 268 events. 19/268 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1027 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 208. Up to 8 conditions per place. [2023-11-17 15:05:52,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 231 transitions, 480 flow [2023-11-17 15:05:52,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 231 transitions, 480 flow [2023-11-17 15:05:52,353 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:05:52,353 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 231 transitions, 480 flow [2023-11-17 15:05:52,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 231 transitions, 480 flow [2023-11-17 15:05:52,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 231 transitions, 480 flow [2023-11-17 15:05:52,377 INFO L124 PetriNetUnfolderBase]: 19/268 cut-off events. [2023-11-17 15:05:52,377 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:05:52,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 268 events. 19/268 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1027 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 208. Up to 8 conditions per place. [2023-11-17 15:05:52,388 INFO L119 LiptonReduction]: Number of co-enabled transitions 31200 [2023-11-17 15:05:55,989 INFO L134 LiptonReduction]: Checked pairs total: 139431 [2023-11-17 15:05:55,989 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-11-17 15:05:55,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:05:55,991 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;@e7363ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:05:55,991 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 15:05:55,995 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:05:55,995 INFO L124 PetriNetUnfolderBase]: 5/48 cut-off events. [2023-11-17 15:05:55,995 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:05:55,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:55,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:05:55,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 15:05:55,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:55,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1098176083, now seen corresponding path program 1 times [2023-11-17 15:05:55,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:55,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556371546] [2023-11-17 15:05:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:55,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:56,103 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 15:05:56,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:56,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556371546] [2023-11-17 15:05:56,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556371546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:05:56,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:05:56,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:05:56,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994402863] [2023-11-17 15:05:56,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:05:56,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:05:56,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:56,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:05:56,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:05:56,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 490 [2023-11-17 15:05:56,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 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 15:05:56,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:56,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 490 [2023-11-17 15:05:56,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:05:59,652 INFO L124 PetriNetUnfolderBase]: 39831/56433 cut-off events. [2023-11-17 15:05:59,652 INFO L125 PetriNetUnfolderBase]: For 1930/1930 co-relation queries the response was YES. [2023-11-17 15:05:59,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113273 conditions, 56433 events. 39831/56433 cut-off events. For 1930/1930 co-relation queries the response was YES. Maximal size of possible extension queue 2911. Compared 406552 event pairs, 12403 based on Foata normal form. 0/46854 useless extension candidates. Maximal degree in co-relation 36509. Up to 28153 conditions per place. [2023-11-17 15:05:59,965 INFO L140 encePairwiseOnDemand]: 467/490 looper letters, 196 selfloop transitions, 17 changer transitions 0/222 dead transitions. [2023-11-17 15:05:59,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 222 transitions, 931 flow [2023-11-17 15:05:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:05:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:05:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1101 transitions. [2023-11-17 15:05:59,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37448979591836734 [2023-11-17 15:05:59,969 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1101 transitions. [2023-11-17 15:05:59,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1101 transitions. [2023-11-17 15:05:59,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:05:59,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1101 transitions. [2023-11-17 15:05:59,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.5) internal successors, (1101), 6 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:05:59,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 490.0) internal successors, (3430), 7 states have internal predecessors, (3430), 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 15:05:59,980 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 490.0) internal successors, (3430), 7 states have internal predecessors, (3430), 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 15:05:59,982 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 186 flow. Second operand 6 states and 1101 transitions. [2023-11-17 15:05:59,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 222 transitions, 931 flow [2023-11-17 15:05:59,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 222 transitions, 921 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:59,990 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 312 flow [2023-11-17 15:05:59,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=87, PETRI_TRANSITIONS=96} [2023-11-17 15:05:59,992 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 8 predicate places. [2023-11-17 15:05:59,992 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 312 flow [2023-11-17 15:05:59,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 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 15:05:59,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:59,993 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:05:59,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:05:59,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 15:05:59,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:59,993 INFO L85 PathProgramCache]: Analyzing trace with hash -467385616, now seen corresponding path program 1 times [2023-11-17 15:05:59,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:59,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070622334] [2023-11-17 15:05:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:59,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:00,014 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:06:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:00,034 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:06:00,034 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:06:00,034 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-17 15:06:00,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-17 15:06:00,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-17 15:06:00,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-17 15:06:00,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-17 15:06:00,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-17 15:06:00,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-17 15:06:00,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-17 15:06:00,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-17 15:06:00,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:06:00,035 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:06:00,036 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:06:00,036 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:06:00,065 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:00,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 297 transitions, 622 flow [2023-11-17 15:06:00,266 INFO L124 PetriNetUnfolderBase]: 25/347 cut-off events. [2023-11-17 15:06:00,266 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:06:00,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 347 events. 25/347 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1478 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 276. Up to 10 conditions per place. [2023-11-17 15:06:00,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 285 places, 297 transitions, 622 flow [2023-11-17 15:06:00,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 297 transitions, 622 flow [2023-11-17 15:06:00,273 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:00,273 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 285 places, 297 transitions, 622 flow [2023-11-17 15:06:00,273 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 285 places, 297 transitions, 622 flow [2023-11-17 15:06:00,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 297 transitions, 622 flow [2023-11-17 15:06:00,310 INFO L124 PetriNetUnfolderBase]: 25/347 cut-off events. [2023-11-17 15:06:00,310 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:06:00,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 347 events. 25/347 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1478 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 276. Up to 10 conditions per place. [2023-11-17 15:06:00,326 INFO L119 LiptonReduction]: Number of co-enabled transitions 58760 [2023-11-17 15:06:05,519 INFO L134 LiptonReduction]: Checked pairs total: 283097 [2023-11-17 15:06:05,519 INFO L136 LiptonReduction]: Total number of compositions: 326 [2023-11-17 15:06:05,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:05,521 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;@e7363ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:05,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-17 15:06:05,524 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:05,524 INFO L124 PetriNetUnfolderBase]: 5/45 cut-off events. [2023-11-17 15:06:05,524 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:06:05,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:05,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:05,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-11-17 15:06:05,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash -844121655, now seen corresponding path program 1 times [2023-11-17 15:06:05,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:05,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46410381] [2023-11-17 15:06:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:05,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:05,598 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 15:06:05,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:05,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46410381] [2023-11-17 15:06:05,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46410381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:05,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:05,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:06:05,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482495378] [2023-11-17 15:06:05,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:05,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:06:05,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:05,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:06:05,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:06:05,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 623 [2023-11-17 15:06:05,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 110 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 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 15:06:05,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:05,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 623 [2023-11-17 15:06:05,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand