/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 --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:38:27,176 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:38:27,268 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 11:38:27,300 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:38:27,302 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:38:27,302 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:38:27,303 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:38:27,303 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:38:27,304 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:38:27,307 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:38:27,308 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:38:27,308 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:38:27,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:38:27,309 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:38:27,310 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:38:27,310 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:38:27,310 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:38:27,310 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:38:27,310 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:38:27,311 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:38:27,311 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:38:27,312 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:38:27,312 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:38:27,312 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:38:27,312 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:38:27,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:38:27,313 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:38:27,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:38:27,313 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:38:27,314 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:38:27,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:38:27,315 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:38:27,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:38:27,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:38:27,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:38:27,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:38:27,579 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:38:27,580 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:38:27,581 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-17 11:38:28,856 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:38:29,072 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:38:29,074 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-17 11:38:29,094 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0376efc43/891a98c10fb0476b88c5a05081530d61/FLAG5b9efb01a [2023-11-17 11:38:29,108 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0376efc43/891a98c10fb0476b88c5a05081530d61 [2023-11-17 11:38:29,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:38:29,112 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:38:29,113 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:38:29,113 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:38:29,117 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:38:29,118 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,118 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43b6f04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29, skipping insertion in model container [2023-11-17 11:38:29,119 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,165 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:38:29,453 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_19-callback_racing.i[30212,30225] [2023-11-17 11:38:29,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:38:29,497 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:38:29,534 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_19-callback_racing.i[30212,30225] [2023-11-17 11:38:29,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:38:29,583 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:38:29,590 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:38:29,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29 WrapperNode [2023-11-17 11:38:29,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:38:29,592 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:38:29,592 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:38:29,592 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:38:29,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,647 INFO L138 Inliner]: procedures = 174, calls = 44, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2023-11-17 11:38:29,647 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:38:29,648 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:38:29,648 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:38:29,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:38:29,655 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,671 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,682 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,683 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,686 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:38:29,686 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:38:29,687 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:38:29,687 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:38:29,687 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (1/1) ... [2023-11-17 11:38:29,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:38:29,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:38:29,730 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 11:38:29,738 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 11:38:29,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:38:29,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:38:29,755 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:38:29,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:38:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:38:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:38:29,756 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:38:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:38:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:38:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:38:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:38:29,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:38:29,757 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 11:38:29,870 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:38:29,872 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:38:30,166 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:38:30,365 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:38:30,366 INFO L307 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-17 11:38:30,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:38:30 BoogieIcfgContainer [2023-11-17 11:38:30,367 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:38:30,372 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:38:30,372 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:38:30,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:38:30,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:38:29" (1/3) ... [2023-11-17 11:38:30,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbaa3a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:38:30, skipping insertion in model container [2023-11-17 11:38:30,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:29" (2/3) ... [2023-11-17 11:38:30,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbaa3a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:38:30, skipping insertion in model container [2023-11-17 11:38:30,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:38:30" (3/3) ... [2023-11-17 11:38:30,377 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-11-17 11:38:30,392 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:38:30,392 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:38:30,393 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:38:30,429 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:38:30,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 54 transitions, 115 flow [2023-11-17 11:38:30,498 INFO L124 PetriNetUnfolderBase]: 20/85 cut-off events. [2023-11-17 11:38:30,498 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:38:30,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 20/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 269 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-11-17 11:38:30,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 54 transitions, 115 flow [2023-11-17 11:38:30,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 52 transitions, 108 flow [2023-11-17 11:38:30,513 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:30,528 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 52 transitions, 108 flow [2023-11-17 11:38:30,532 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 52 transitions, 108 flow [2023-11-17 11:38:30,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 52 transitions, 108 flow [2023-11-17 11:38:30,559 INFO L124 PetriNetUnfolderBase]: 19/83 cut-off events. [2023-11-17 11:38:30,559 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:38:30,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 19/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 253 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-11-17 11:38:30,562 INFO L119 LiptonReduction]: Number of co-enabled transitions 1122 [2023-11-17 11:38:31,331 INFO L134 LiptonReduction]: Checked pairs total: 2676 [2023-11-17 11:38:31,331 INFO L136 LiptonReduction]: Total number of compositions: 41 [2023-11-17 11:38:31,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:31,357 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;@2f806c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:31,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:38:31,363 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:31,363 INFO L124 PetriNetUnfolderBase]: 9/28 cut-off events. [2023-11-17 11:38:31,363 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:38:31,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:31,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:38:31,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:38:31,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:31,369 INFO L85 PathProgramCache]: Analyzing trace with hash -179892061, now seen corresponding path program 1 times [2023-11-17 11:38:31,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:31,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421636290] [2023-11-17 11:38:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:31,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:31,512 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:38:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:31,577 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:38:31,578 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:38:31,579 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:38:31,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:38:31,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:38:31,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:38:31,581 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:38:31,584 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:38:31,584 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:38:31,601 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:38:31,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:31,637 INFO L124 PetriNetUnfolderBase]: 33/142 cut-off events. [2023-11-17 11:38:31,637 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-17 11:38:31,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 142 events. 33/142 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 577 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 89. Up to 9 conditions per place. [2023-11-17 11:38:31,640 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:31,641 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:31,641 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:31,641 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:31,642 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:31,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:31,660 INFO L124 PetriNetUnfolderBase]: 33/142 cut-off events. [2023-11-17 11:38:31,660 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-17 11:38:31,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 142 events. 33/142 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 577 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 89. Up to 9 conditions per place. [2023-11-17 11:38:31,667 INFO L119 LiptonReduction]: Number of co-enabled transitions 2992 [2023-11-17 11:38:32,559 INFO L134 LiptonReduction]: Checked pairs total: 7614 [2023-11-17 11:38:32,559 INFO L136 LiptonReduction]: Total number of compositions: 54 [2023-11-17 11:38:32,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:32,563 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;@2f806c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:32,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:38:32,568 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:32,568 INFO L124 PetriNetUnfolderBase]: 11/35 cut-off events. [2023-11-17 11:38:32,568 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:38:32,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:32,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:38:32,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:38:32,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:32,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1101775516, now seen corresponding path program 1 times [2023-11-17 11:38:32,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:32,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479569162] [2023-11-17 11:38:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:32,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:32,765 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 11:38:32,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:32,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479569162] [2023-11-17 11:38:32,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479569162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:38:32,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:38:32,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:38:32,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13321561] [2023-11-17 11:38:32,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:38:32,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:38:32,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:38:32,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:38:32,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 127 [2023-11-17 11:38:32,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 46 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 11:38:32,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:32,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 127 [2023-11-17 11:38:32,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:33,226 INFO L124 PetriNetUnfolderBase]: 2025/3390 cut-off events. [2023-11-17 11:38:33,227 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-17 11:38:33,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6775 conditions, 3390 events. 2025/3390 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 17622 event pairs, 856 based on Foata normal form. 106/2950 useless extension candidates. Maximal degree in co-relation 4289. Up to 1665 conditions per place. [2023-11-17 11:38:33,245 INFO L140 encePairwiseOnDemand]: 109/127 looper letters, 53 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-17 11:38:33,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 60 transitions, 258 flow [2023-11-17 11:38:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:38:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:38:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-17 11:38:33,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884514435695538 [2023-11-17 11:38:33,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-17 11:38:33,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-17 11:38:33,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:33,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-17 11:38:33,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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 11:38:33,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 11:38:33,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 11:38:33,272 INFO L175 Difference]: Start difference. First operand has 36 places, 46 transitions, 108 flow. Second operand 3 states and 148 transitions. [2023-11-17 11:38:33,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 60 transitions, 258 flow [2023-11-17 11:38:33,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 60 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:38:33,279 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 126 flow [2023-11-17 11:38:33,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-11-17 11:38:33,284 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-17 11:38:33,285 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 126 flow [2023-11-17 11:38:33,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 11:38:33,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:33,285 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:38:33,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:38:33,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:38:33,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:33,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1552677659, now seen corresponding path program 1 times [2023-11-17 11:38:33,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:33,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767795221] [2023-11-17 11:38:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:33,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:33,319 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:38:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:33,348 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:38:33,349 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:38:33,350 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:38:33,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:38:33,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:38:33,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:38:33,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:38:33,357 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:38:33,358 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:38:33,358 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:38:33,380 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:38:33,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:33,406 INFO L124 PetriNetUnfolderBase]: 49/210 cut-off events. [2023-11-17 11:38:33,407 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-17 11:38:33,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 210 events. 49/210 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 928 event pairs, 1 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 153. Up to 12 conditions per place. [2023-11-17 11:38:33,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:33,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:33,410 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:33,410 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:33,411 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:33,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:33,430 INFO L124 PetriNetUnfolderBase]: 49/210 cut-off events. [2023-11-17 11:38:33,430 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-17 11:38:33,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 210 events. 49/210 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 928 event pairs, 1 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 153. Up to 12 conditions per place. [2023-11-17 11:38:33,435 INFO L119 LiptonReduction]: Number of co-enabled transitions 5508 [2023-11-17 11:38:34,517 INFO L134 LiptonReduction]: Checked pairs total: 12372 [2023-11-17 11:38:34,517 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-11-17 11:38:34,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:34,520 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;@2f806c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:34,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:38:34,524 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:34,524 INFO L124 PetriNetUnfolderBase]: 11/34 cut-off events. [2023-11-17 11:38:34,524 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:38:34,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:34,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:38:34,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:38:34,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:34,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1077000719, now seen corresponding path program 1 times [2023-11-17 11:38:34,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:34,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427918275] [2023-11-17 11:38:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:34,575 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 11:38:34,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:34,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427918275] [2023-11-17 11:38:34,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427918275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:38:34,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:38:34,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:38:34,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893222263] [2023-11-17 11:38:34,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:38:34,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:38:34,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:38:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:38:34,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 160 [2023-11-17 11:38:34,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 58 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 11:38:34,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:34,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 160 [2023-11-17 11:38:34,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:37,203 INFO L124 PetriNetUnfolderBase]: 21845/31724 cut-off events. [2023-11-17 11:38:37,204 INFO L125 PetriNetUnfolderBase]: For 838/838 co-relation queries the response was YES. [2023-11-17 11:38:37,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63636 conditions, 31724 events. 21845/31724 cut-off events. For 838/838 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 191119 event pairs, 9906 based on Foata normal form. 734/27854 useless extension candidates. Maximal degree in co-relation 12097. Up to 16171 conditions per place. [2023-11-17 11:38:37,395 INFO L140 encePairwiseOnDemand]: 137/160 looper letters, 67 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-11-17 11:38:37,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 328 flow [2023-11-17 11:38:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:38:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:38:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-11-17 11:38:37,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-17 11:38:37,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-11-17 11:38:37,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-11-17 11:38:37,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:37,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-11-17 11:38:37,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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 11:38:37,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 11:38:37,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 11:38:37,400 INFO L175 Difference]: Start difference. First operand has 45 places, 58 transitions, 143 flow. Second operand 3 states and 192 transitions. [2023-11-17 11:38:37,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 328 flow [2023-11-17 11:38:37,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:38:37,405 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 155 flow [2023-11-17 11:38:37,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-11-17 11:38:37,406 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-11-17 11:38:37,406 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 155 flow [2023-11-17 11:38:37,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 11:38:37,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:37,406 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:38:37,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:38:37,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:38:37,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:37,407 INFO L85 PathProgramCache]: Analyzing trace with hash 466142562, now seen corresponding path program 1 times [2023-11-17 11:38:37,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:37,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30548580] [2023-11-17 11:38:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:37,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:37,442 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:38:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:37,465 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:38:37,465 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:38:37,465 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:38:37,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:38:37,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:38:37,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:38:37,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:38:37,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:38:37,469 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:38:37,470 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:38:37,470 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:38:37,496 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:38:37,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:37,518 INFO L124 PetriNetUnfolderBase]: 73/302 cut-off events. [2023-11-17 11:38:37,518 INFO L125 PetriNetUnfolderBase]: For 48/51 co-relation queries the response was YES. [2023-11-17 11:38:37,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 302 events. 73/302 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1418 event pairs, 6 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 234. Up to 32 conditions per place. [2023-11-17 11:38:37,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:37,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:37,522 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:37,522 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:37,523 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:37,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:37,542 INFO L124 PetriNetUnfolderBase]: 73/302 cut-off events. [2023-11-17 11:38:37,542 INFO L125 PetriNetUnfolderBase]: For 48/51 co-relation queries the response was YES. [2023-11-17 11:38:37,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 302 events. 73/302 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1418 event pairs, 6 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 234. Up to 32 conditions per place. [2023-11-17 11:38:37,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 8704 [2023-11-17 11:38:38,913 INFO L134 LiptonReduction]: Checked pairs total: 22200 [2023-11-17 11:38:38,913 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-11-17 11:38:38,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:38,920 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;@2f806c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:38,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:38:38,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:38,924 INFO L124 PetriNetUnfolderBase]: 8/27 cut-off events. [2023-11-17 11:38:38,926 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:38:38,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:38,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:38:38,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:38:38,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:38,929 INFO L85 PathProgramCache]: Analyzing trace with hash -76016626, now seen corresponding path program 1 times [2023-11-17 11:38:38,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:38,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256014281] [2023-11-17 11:38:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:38,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:38,988 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 11:38:38,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:38,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256014281] [2023-11-17 11:38:38,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256014281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:38:38,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:38:38,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:38:38,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565594390] [2023-11-17 11:38:38,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:38:38,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:38:38,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:38,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:38:38,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:38:38,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 197 [2023-11-17 11:38:38,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 68 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 11:38:38,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:38,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 197 [2023-11-17 11:38:38,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:56,306 INFO L124 PetriNetUnfolderBase]: 210859/282361 cut-off events. [2023-11-17 11:38:56,306 INFO L125 PetriNetUnfolderBase]: For 9373/9373 co-relation queries the response was YES. [2023-11-17 11:38:56,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567763 conditions, 282361 events. 210859/282361 cut-off events. For 9373/9373 co-relation queries the response was YES. Maximal size of possible extension queue 5017. Compared 1846372 event pairs, 98554 based on Foata normal form. 5073/249032 useless extension candidates. Maximal degree in co-relation 63631. Up to 148901 conditions per place. [2023-11-17 11:38:57,542 INFO L140 encePairwiseOnDemand]: 171/197 looper letters, 81 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2023-11-17 11:38:57,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 400 flow [2023-11-17 11:38:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:38:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:38:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2023-11-17 11:38:57,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925549915397631 [2023-11-17 11:38:57,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2023-11-17 11:38:57,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2023-11-17 11:38:57,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:57,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2023-11-17 11:38:57,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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 11:38:57,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 11:38:57,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 11:38:57,548 INFO L175 Difference]: Start difference. First operand has 54 places, 68 transitions, 176 flow. Second operand 3 states and 232 transitions. [2023-11-17 11:38:57,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 400 flow [2023-11-17 11:38:57,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 88 transitions, 400 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:38:57,560 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 186 flow [2023-11-17 11:38:57,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2023-11-17 11:38:57,563 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-11-17 11:38:57,563 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 186 flow [2023-11-17 11:38:57,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 11:38:57,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:57,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:38:57,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:38:57,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:38:57,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:57,565 INFO L85 PathProgramCache]: Analyzing trace with hash 37297835, now seen corresponding path program 1 times [2023-11-17 11:38:57,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:57,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847130879] [2023-11-17 11:38:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:57,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:57,627 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 11:38:57,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:57,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847130879] [2023-11-17 11:38:57,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847130879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:38:57,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26279887] [2023-11-17 11:38:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:57,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:38:57,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:38:57,631 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 11:38:57,633 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 11:38:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:57,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:38:57,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:38:57,786 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 11:38:57,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:38:57,806 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 11:38:57,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26279887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:38:57,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:38:57,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:38:57,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196105120] [2023-11-17 11:38:57,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:38:57,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:38:57,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:57,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:38:57,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:38:57,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 197 [2023-11-17 11:38:57,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 186 flow. Second operand has 7 states, 7 states have (on average 39.142857142857146) internal successors, (274), 7 states have internal predecessors, (274), 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 11:38:57,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:57,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 197 [2023-11-17 11:38:57,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:12,743 INFO L124 PetriNetUnfolderBase]: 196661/265309 cut-off events. [2023-11-17 11:39:12,743 INFO L125 PetriNetUnfolderBase]: For 56485/56485 co-relation queries the response was YES. [2023-11-17 11:39:13,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585818 conditions, 265309 events. 196661/265309 cut-off events. For 56485/56485 co-relation queries the response was YES. Maximal size of possible extension queue 4601. Compared 1732405 event pairs, 27947 based on Foata normal form. 0/247720 useless extension candidates. Maximal degree in co-relation 145446. Up to 248008 conditions per place. [2023-11-17 11:39:14,059 INFO L140 encePairwiseOnDemand]: 193/197 looper letters, 104 selfloop transitions, 6 changer transitions 0/112 dead transitions. [2023-11-17 11:39:14,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 112 transitions, 530 flow [2023-11-17 11:39:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:39:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:39:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 326 transitions. [2023-11-17 11:39:14,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27580372250423013 [2023-11-17 11:39:14,061 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 326 transitions. [2023-11-17 11:39:14,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 326 transitions. [2023-11-17 11:39:14,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:14,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 326 transitions. [2023-11-17 11:39:14,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 54.333333333333336) internal successors, (326), 6 states have internal predecessors, (326), 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 11:39:14,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 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 11:39:14,066 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 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 11:39:14,066 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 186 flow. Second operand 6 states and 326 transitions. [2023-11-17 11:39:14,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 112 transitions, 530 flow [2023-11-17 11:39:14,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 112 transitions, 520 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:39:14,165 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 218 flow [2023-11-17 11:39:14,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-11-17 11:39:14,166 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2023-11-17 11:39:14,166 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 218 flow [2023-11-17 11:39:14,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.142857142857146) internal successors, (274), 7 states have internal predecessors, (274), 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 11:39:14,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:14,166 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:14,177 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 11:39:14,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:39:14,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:39:14,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:14,373 INFO L85 PathProgramCache]: Analyzing trace with hash 929238433, now seen corresponding path program 1 times [2023-11-17 11:39:14,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:14,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323414661] [2023-11-17 11:39:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:14,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:14,388 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:14,403 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:14,404 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:14,404 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:39:14,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:39:14,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:39:14,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:39:14,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:39:14,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:39:14,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:39:14,405 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:39:14,405 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:14,405 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:39:14,436 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 11:39:14,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 130 transitions, 315 flow [2023-11-17 11:39:14,473 INFO L124 PetriNetUnfolderBase]: 117/446 cut-off events. [2023-11-17 11:39:14,473 INFO L125 PetriNetUnfolderBase]: For 110/115 co-relation queries the response was YES. [2023-11-17 11:39:14,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 446 events. 117/446 cut-off events. For 110/115 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2258 event pairs, 23 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 352. Up to 80 conditions per place. [2023-11-17 11:39:14,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 130 transitions, 315 flow [2023-11-17 11:39:14,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 130 transitions, 315 flow [2023-11-17 11:39:14,479 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:14,479 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 130 transitions, 315 flow [2023-11-17 11:39:14,479 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 130 transitions, 315 flow [2023-11-17 11:39:14,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 130 transitions, 315 flow [2023-11-17 11:39:14,510 INFO L124 PetriNetUnfolderBase]: 117/446 cut-off events. [2023-11-17 11:39:14,510 INFO L125 PetriNetUnfolderBase]: For 110/115 co-relation queries the response was YES. [2023-11-17 11:39:14,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 446 events. 117/446 cut-off events. For 110/115 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2258 event pairs, 23 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 352. Up to 80 conditions per place. [2023-11-17 11:39:14,526 INFO L119 LiptonReduction]: Number of co-enabled transitions 12580 [2023-11-17 11:39:15,951 INFO L134 LiptonReduction]: Checked pairs total: 32523 [2023-11-17 11:39:15,951 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-11-17 11:39:15,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:15,953 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;@2f806c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:15,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:39:15,956 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:15,956 INFO L124 PetriNetUnfolderBase]: 12/37 cut-off events. [2023-11-17 11:39:15,956 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:39:15,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:15,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:39:15,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:39:15,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:15,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2019591773, now seen corresponding path program 1 times [2023-11-17 11:39:15,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:15,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062959925] [2023-11-17 11:39:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:15,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:16,000 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 11:39:16,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:16,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062959925] [2023-11-17 11:39:16,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062959925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:16,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:16,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:39:16,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59397959] [2023-11-17 11:39:16,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:16,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:16,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:16,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:16,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 233 [2023-11-17 11:39:16,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 11:39:16,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:16,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 233 [2023-11-17 11:39:16,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand