/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_11-ptr_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:35:59,302 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:35:59,383 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:35:59,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:35:59,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:35:59,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:35:59,417 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:35:59,417 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:35:59,418 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:35:59,421 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:35:59,422 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:35:59,422 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:35:59,422 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:35:59,423 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:35:59,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:35:59,424 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:35:59,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:35:59,424 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:35:59,424 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:35:59,425 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:35:59,425 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:35:59,425 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:35:59,426 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:35:59,426 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:35:59,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:35:59,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:35:59,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:35:59,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:35:59,427 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:35:59,427 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:35:59,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:35:59,428 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:35:59,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:35:59,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:35:59,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:35:59,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:35:59,665 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:35:59,666 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:35:59,667 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-11-17 15:36:00,801 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:36:01,027 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:36:01,028 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-11-17 15:36:01,040 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a8c98c8a/3a722fd982d448a69c55dedc7ffda33b/FLAG535403fb0 [2023-11-17 15:36:01,051 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a8c98c8a/3a722fd982d448a69c55dedc7ffda33b [2023-11-17 15:36:01,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:36:01,055 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:36:01,056 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:36:01,056 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:36:01,060 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:36:01,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685f096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01, skipping insertion in model container [2023-11-17 15:36:01,061 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,112 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:36:01,378 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_11-ptr_racing.i[30176,30189] [2023-11-17 15:36:01,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:36:01,413 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:36:01,446 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_11-ptr_racing.i[30176,30189] [2023-11-17 15:36:01,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:36:01,487 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:36:01,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01 WrapperNode [2023-11-17 15:36:01,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:36:01,489 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:36:01,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:36:01,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:36:01,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,522 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,541 INFO L138 Inliner]: procedures = 171, calls = 48, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2023-11-17 15:36:01,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:36:01,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:36:01,543 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:36:01,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:36:01,551 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,565 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,565 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,571 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,588 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,593 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:36:01,593 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:36:01,593 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:36:01,594 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:36:01,594 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (1/1) ... [2023-11-17 15:36:01,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:36:01,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:01,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:36:01,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:36:01,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:36:01,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:36:01,677 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:36:01,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:36:01,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:36:01,678 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:36:01,678 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:36:01,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:36:01,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:36:01,678 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:36:01,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:36:01,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:36:01,680 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:36:01,785 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:36:01,787 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:36:01,998 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:36:02,030 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:36:02,030 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 15:36:02,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:02 BoogieIcfgContainer [2023-11-17 15:36:02,032 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:36:02,034 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:36:02,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:36:02,037 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:36:02,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:36:01" (1/3) ... [2023-11-17 15:36:02,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446966ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:02, skipping insertion in model container [2023-11-17 15:36:02,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:01" (2/3) ... [2023-11-17 15:36:02,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446966ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:02, skipping insertion in model container [2023-11-17 15:36:02,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:02" (3/3) ... [2023-11-17 15:36:02,039 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2023-11-17 15:36:02,056 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:36:02,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:36:02,057 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:36:02,141 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:36:02,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 124 transitions, 255 flow [2023-11-17 15:36:02,259 INFO L124 PetriNetUnfolderBase]: 17/166 cut-off events. [2023-11-17 15:36:02,259 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:36:02,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 166 events. 17/166 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 426 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-11-17 15:36:02,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 124 transitions, 255 flow [2023-11-17 15:36:02,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 119 transitions, 242 flow [2023-11-17 15:36:02,280 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:02,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 119 transitions, 242 flow [2023-11-17 15:36:02,293 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 119 transitions, 242 flow [2023-11-17 15:36:02,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 119 transitions, 242 flow [2023-11-17 15:36:02,321 INFO L124 PetriNetUnfolderBase]: 16/161 cut-off events. [2023-11-17 15:36:02,321 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:02,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 161 events. 16/161 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 407 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-11-17 15:36:02,325 INFO L119 LiptonReduction]: Number of co-enabled transitions 3456 [2023-11-17 15:36:05,689 INFO L134 LiptonReduction]: Checked pairs total: 5506 [2023-11-17 15:36:05,689 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-11-17 15:36:05,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:05,707 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;@7be83213, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:05,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:36:05,710 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:05,710 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:36:05,710 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:05,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:05,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:36:05,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:05,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash 16006892, now seen corresponding path program 1 times [2023-11-17 15:36:05,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:05,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624371448] [2023-11-17 15:36:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:05,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:05,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:05,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624371448] [2023-11-17 15:36:05,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624371448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:05,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:05,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:36:05,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937481637] [2023-11-17 15:36:05,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:05,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:05,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:05,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:05,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:05,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 238 [2023-11-17 15:36:05,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:05,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:05,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 238 [2023-11-17 15:36:05,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:06,075 INFO L124 PetriNetUnfolderBase]: 90/214 cut-off events. [2023-11-17 15:36:06,075 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:06,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 214 events. 90/214 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 903 event pairs, 0 based on Foata normal form. 10/202 useless extension candidates. Maximal degree in co-relation 399. Up to 190 conditions per place. [2023-11-17 15:36:06,077 INFO L140 encePairwiseOnDemand]: 226/238 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-11-17 15:36:06,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 136 flow [2023-11-17 15:36:06,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-11-17 15:36:06,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495798319327731 [2023-11-17 15:36:06,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-11-17 15:36:06,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-11-17 15:36:06,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:06,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-11-17 15:36:06,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:06,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:06,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:06,103 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 68 flow. Second operand 3 states and 321 transitions. [2023-11-17 15:36:06,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 136 flow [2023-11-17 15:36:06,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:06,107 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 50 flow [2023-11-17 15:36:06,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-11-17 15:36:06,111 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-11-17 15:36:06,111 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 50 flow [2023-11-17 15:36:06,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:06,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:06,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:36:06,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:36:06,112 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:06,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:06,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1808169748, now seen corresponding path program 1 times [2023-11-17 15:36:06,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:06,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743583940] [2023-11-17 15:36:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:06,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:06,138 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:06,169 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:06,169 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:06,171 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:36:06,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:36:06,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:36:06,173 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:36:06,174 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:06,175 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:36:06,193 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:36:06,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 162 transitions, 340 flow [2023-11-17 15:36:06,223 INFO L124 PetriNetUnfolderBase]: 31/272 cut-off events. [2023-11-17 15:36:06,223 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:36:06,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 272 events. 31/272 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 879 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 168. Up to 8 conditions per place. [2023-11-17 15:36:06,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 162 transitions, 340 flow [2023-11-17 15:36:06,227 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 162 transitions, 340 flow [2023-11-17 15:36:06,227 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:06,228 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 162 transitions, 340 flow [2023-11-17 15:36:06,228 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 162 transitions, 340 flow [2023-11-17 15:36:06,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 162 transitions, 340 flow [2023-11-17 15:36:06,252 INFO L124 PetriNetUnfolderBase]: 31/272 cut-off events. [2023-11-17 15:36:06,253 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:36:06,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 272 events. 31/272 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 879 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 168. Up to 8 conditions per place. [2023-11-17 15:36:06,261 INFO L119 LiptonReduction]: Number of co-enabled transitions 10296 [2023-11-17 15:36:09,623 INFO L134 LiptonReduction]: Checked pairs total: 17272 [2023-11-17 15:36:09,624 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-11-17 15:36:09,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:09,627 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;@7be83213, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:09,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:36:09,630 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:09,630 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-11-17 15:36:09,630 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:09,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:09,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:36:09,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:09,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash 26557392, now seen corresponding path program 1 times [2023-11-17 15:36:09,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:09,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920120780] [2023-11-17 15:36:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:09,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:09,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:09,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920120780] [2023-11-17 15:36:09,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920120780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:09,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:09,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:36:09,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041070046] [2023-11-17 15:36:09,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:09,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:09,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:09,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:09,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:09,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 305 [2023-11-17 15:36:09,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 56 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:09,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:09,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 305 [2023-11-17 15:36:09,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:10,091 INFO L124 PetriNetUnfolderBase]: 2248/3880 cut-off events. [2023-11-17 15:36:10,091 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-17 15:36:10,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7578 conditions, 3880 events. 2248/3880 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 22049 event pairs, 1026 based on Foata normal form. 247/3741 useless extension candidates. Maximal degree in co-relation 646. Up to 3624 conditions per place. [2023-11-17 15:36:10,103 INFO L140 encePairwiseOnDemand]: 287/305 looper letters, 37 selfloop transitions, 2 changer transitions 9/53 dead transitions. [2023-11-17 15:36:10,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 216 flow [2023-11-17 15:36:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-11-17 15:36:10,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524590163934426 [2023-11-17 15:36:10,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-11-17 15:36:10,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-11-17 15:36:10,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:10,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-11-17 15:36:10,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:10,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:10,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:10,111 INFO L175 Difference]: Start difference. First operand has 44 places, 56 transitions, 128 flow. Second operand 3 states and 414 transitions. [2023-11-17 15:36:10,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 216 flow [2023-11-17 15:36:10,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:10,113 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-11-17 15:36:10,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-11-17 15:36:10,114 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-17 15:36:10,114 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-11-17 15:36:10,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:10,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:10,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:36:10,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:36:10,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:10,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:10,115 INFO L85 PathProgramCache]: Analyzing trace with hash 447620429, now seen corresponding path program 1 times [2023-11-17 15:36:10,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:10,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384127031] [2023-11-17 15:36:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:10,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:10,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384127031] [2023-11-17 15:36:10,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384127031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:36:10,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142172005] [2023-11-17 15:36:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:10,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:36:10,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:10,174 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 15:36:10,217 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 15:36:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:10,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:36:10,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:36:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:10,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:36:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:10,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142172005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:36:10,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:36:10,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:36:10,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714835172] [2023-11-17 15:36:10,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:36:10,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:36:10,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:36:10,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:36:10,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 305 [2023-11-17 15:36:10,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 117.28571428571429) internal successors, (821), 7 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:10,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:10,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 305 [2023-11-17 15:36:10,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:10,517 INFO L124 PetriNetUnfolderBase]: 518/1028 cut-off events. [2023-11-17 15:36:10,517 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-11-17 15:36:10,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2085 conditions, 1028 events. 518/1028 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5315 event pairs, 0 based on Foata normal form. 121/1148 useless extension candidates. Maximal degree in co-relation 189. Up to 618 conditions per place. [2023-11-17 15:36:10,524 INFO L140 encePairwiseOnDemand]: 302/305 looper letters, 53 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-11-17 15:36:10,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 252 flow [2023-11-17 15:36:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:36:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:36:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-11-17 15:36:10,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41508196721311474 [2023-11-17 15:36:10,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-11-17 15:36:10,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-11-17 15:36:10,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:10,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-11-17 15:36:10,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:10,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:10,533 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:10,533 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 5 states and 633 transitions. [2023-11-17 15:36:10,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 252 flow [2023-11-17 15:36:10,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:36:10,537 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-17 15:36:10,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-17 15:36:10,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-17 15:36:10,539 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-17 15:36:10,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 117.28571428571429) internal successors, (821), 7 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:10,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:10,540 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:36:10,552 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 15:36:10,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:36:10,746 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:10,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:10,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1279531989, now seen corresponding path program 1 times [2023-11-17 15:36:10,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:10,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476701050] [2023-11-17 15:36:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:10,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:10,761 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:10,775 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:10,776 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:10,776 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:36:10,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:36:10,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:36:10,776 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:36:10,777 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:10,777 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:36:10,810 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:36:10,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 200 transitions, 427 flow [2023-11-17 15:36:10,859 INFO L124 PetriNetUnfolderBase]: 50/413 cut-off events. [2023-11-17 15:36:10,859 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:36:10,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 413 events. 50/413 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1462 event pairs, 1 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 280. Up to 16 conditions per place. [2023-11-17 15:36:10,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 200 transitions, 427 flow [2023-11-17 15:36:10,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 200 transitions, 427 flow [2023-11-17 15:36:10,866 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:10,869 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 200 transitions, 427 flow [2023-11-17 15:36:10,869 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 200 transitions, 427 flow [2023-11-17 15:36:10,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 200 transitions, 427 flow [2023-11-17 15:36:10,914 INFO L124 PetriNetUnfolderBase]: 50/413 cut-off events. [2023-11-17 15:36:10,914 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:36:10,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 413 events. 50/413 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1462 event pairs, 1 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 280. Up to 16 conditions per place. [2023-11-17 15:36:10,932 INFO L119 LiptonReduction]: Number of co-enabled transitions 19656 [2023-11-17 15:36:14,853 INFO L134 LiptonReduction]: Checked pairs total: 36704 [2023-11-17 15:36:14,854 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-11-17 15:36:14,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:14,856 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;@7be83213, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:14,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:36:14,858 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:14,858 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 15:36:14,858 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:14,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:14,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:36:14,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:14,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:14,859 INFO L85 PathProgramCache]: Analyzing trace with hash 39260829, now seen corresponding path program 1 times [2023-11-17 15:36:14,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:14,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809296760] [2023-11-17 15:36:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:14,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:14,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:14,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809296760] [2023-11-17 15:36:14,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809296760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:14,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:14,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:36:14,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297354256] [2023-11-17 15:36:14,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:14,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:14,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:14,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:14,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:14,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 374 [2023-11-17 15:36:14,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 75 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:14,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:14,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 374 [2023-11-17 15:36:14,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:18,729 INFO L124 PetriNetUnfolderBase]: 35761/52865 cut-off events. [2023-11-17 15:36:18,729 INFO L125 PetriNetUnfolderBase]: For 1435/1435 co-relation queries the response was YES. [2023-11-17 15:36:18,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103975 conditions, 52865 events. 35761/52865 cut-off events. For 1435/1435 co-relation queries the response was YES. Maximal size of possible extension queue 1188. Compared 356170 event pairs, 22925 based on Foata normal form. 3953/52551 useless extension candidates. Maximal degree in co-relation 8120. Up to 50190 conditions per place. [2023-11-17 15:36:18,924 INFO L140 encePairwiseOnDemand]: 350/374 looper letters, 47 selfloop transitions, 2 changer transitions 10/66 dead transitions. [2023-11-17 15:36:18,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 275 flow [2023-11-17 15:36:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-11-17 15:36:18,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483065953654189 [2023-11-17 15:36:18,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-11-17 15:36:18,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-11-17 15:36:18,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:18,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-11-17 15:36:18,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:18,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:18,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:18,932 INFO L175 Difference]: Start difference. First operand has 58 places, 75 transitions, 177 flow. Second operand 3 states and 503 transitions. [2023-11-17 15:36:18,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 275 flow [2023-11-17 15:36:18,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 66 transitions, 275 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:18,935 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 118 flow [2023-11-17 15:36:18,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-11-17 15:36:18,938 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-17 15:36:18,938 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 118 flow [2023-11-17 15:36:18,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:18,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:18,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:36:18,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:36:18,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:18,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:18,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1700066271, now seen corresponding path program 1 times [2023-11-17 15:36:18,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:18,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739007893] [2023-11-17 15:36:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:18,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:18,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739007893] [2023-11-17 15:36:18,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739007893] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:36:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152664800] [2023-11-17 15:36:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:18,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:36:18,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:18,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:36:19,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:36:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:19,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:36:19,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:36:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:19,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:36:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:19,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152664800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:36:19,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:36:19,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:36:19,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296681981] [2023-11-17 15:36:19,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:36:19,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:36:19,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:19,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:36:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:36:19,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 374 [2023-11-17 15:36:19,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 141.28571428571428) internal successors, (989), 7 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:19,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:19,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 374 [2023-11-17 15:36:19,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:20,165 INFO L124 PetriNetUnfolderBase]: 8446/13708 cut-off events. [2023-11-17 15:36:20,165 INFO L125 PetriNetUnfolderBase]: For 4862/4862 co-relation queries the response was YES. [2023-11-17 15:36:20,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27578 conditions, 13708 events. 8446/13708 cut-off events. For 4862/4862 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 92346 event pairs, 0 based on Foata normal form. 1221/14929 useless extension candidates. Maximal degree in co-relation 2561. Up to 8074 conditions per place. [2023-11-17 15:36:20,229 INFO L140 encePairwiseOnDemand]: 371/374 looper letters, 93 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2023-11-17 15:36:20,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 104 transitions, 430 flow [2023-11-17 15:36:20,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:36:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:36:20,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 934 transitions. [2023-11-17 15:36:20,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41622103386809267 [2023-11-17 15:36:20,232 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 934 transitions. [2023-11-17 15:36:20,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 934 transitions. [2023-11-17 15:36:20,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:20,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 934 transitions. [2023-11-17 15:36:20,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.66666666666666) internal successors, (934), 6 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:20,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:20,239 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:20,239 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 118 flow. Second operand 6 states and 934 transitions. [2023-11-17 15:36:20,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 104 transitions, 430 flow [2023-11-17 15:36:20,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 104 transitions, 426 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:36:20,248 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-17 15:36:20,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-17 15:36:20,252 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-17 15:36:20,253 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-17 15:36:20,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.28571428571428) internal successors, (989), 7 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:20,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:20,254 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:36:20,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 15:36:20,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-17 15:36:20,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:20,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:20,460 INFO L85 PathProgramCache]: Analyzing trace with hash -23269886, now seen corresponding path program 1 times [2023-11-17 15:36:20,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:20,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109239485] [2023-11-17 15:36:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:20,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:20,481 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:20,509 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:20,509 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:20,509 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:36:20,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:36:20,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:36:20,510 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:36:20,511 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:20,511 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:36:20,544 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:36:20,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 238 transitions, 516 flow [2023-11-17 15:36:20,614 INFO L124 PetriNetUnfolderBase]: 81/626 cut-off events. [2023-11-17 15:36:20,614 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:36:20,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 626 events. 81/626 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2585 event pairs, 6 based on Foata normal form. 0/540 useless extension candidates. Maximal degree in co-relation 433. Up to 32 conditions per place. [2023-11-17 15:36:20,620 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 238 transitions, 516 flow [2023-11-17 15:36:20,624 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 238 transitions, 516 flow [2023-11-17 15:36:20,624 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:20,624 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 238 transitions, 516 flow [2023-11-17 15:36:20,624 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 238 transitions, 516 flow [2023-11-17 15:36:20,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 238 transitions, 516 flow [2023-11-17 15:36:20,686 INFO L124 PetriNetUnfolderBase]: 81/626 cut-off events. [2023-11-17 15:36:20,686 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:36:20,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 626 events. 81/626 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2585 event pairs, 6 based on Foata normal form. 0/540 useless extension candidates. Maximal degree in co-relation 433. Up to 32 conditions per place. [2023-11-17 15:36:20,710 INFO L119 LiptonReduction]: Number of co-enabled transitions 31824 [2023-11-17 15:36:25,032 INFO L134 LiptonReduction]: Checked pairs total: 66720 [2023-11-17 15:36:25,032 INFO L136 LiptonReduction]: Total number of compositions: 207 [2023-11-17 15:36:25,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:25,035 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;@7be83213, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:25,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:36:25,036 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:25,036 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:36:25,036 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:25,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:25,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:36:25,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:25,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:25,037 INFO L85 PathProgramCache]: Analyzing trace with hash 54110362, now seen corresponding path program 1 times [2023-11-17 15:36:25,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:25,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731697182] [2023-11-17 15:36:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:25,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:25,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:25,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731697182] [2023-11-17 15:36:25,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731697182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:25,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:25,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:36:25,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185353587] [2023-11-17 15:36:25,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:25,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:25,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:25,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:25,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:25,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 445 [2023-11-17 15:36:25,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:25,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:25,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 445 [2023-11-17 15:36:25,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand