/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_61-invariant_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:38:49,027 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:38:49,119 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 15:38:49,153 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:38:49,153 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:38:49,154 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:38:49,155 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:38:49,155 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:38:49,156 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:38:49,159 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:38:49,160 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:38:49,160 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:38:49,161 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:38:49,162 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:38:49,162 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:38:49,162 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:38:49,162 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:38:49,163 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:38:49,163 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:38:49,163 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:38:49,163 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:38:49,164 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:38:49,164 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:38:49,164 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:38:49,165 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:38:49,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:38:49,165 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:38:49,165 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:38:49,165 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:38:49,166 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:38:49,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:38:49,167 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:38:49,167 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:38:49,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:38:49,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:38:49,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:38:49,442 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:38:49,443 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:38:49,444 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-17 15:38:50,698 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:38:50,941 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:38:50,942 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-17 15:38:50,956 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ed0fb1b0/ed35a6b810ee497dbec844b328f499dc/FLAG90764125f [2023-11-17 15:38:50,974 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ed0fb1b0/ed35a6b810ee497dbec844b328f499dc [2023-11-17 15:38:50,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:38:50,979 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:38:50,982 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:38:50,982 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:38:50,987 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:38:50,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:50" (1/1) ... [2023-11-17 15:38:50,989 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8cf64a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:50, skipping insertion in model container [2023-11-17 15:38:50,989 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:50" (1/1) ... [2023-11-17 15:38:51,037 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:38:51,393 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_61-invariant_racing.i[30176,30189] [2023-11-17 15:38:51,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:38:51,434 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:38:51,478 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_61-invariant_racing.i[30176,30189] [2023-11-17 15:38:51,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:38:51,542 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:38:51,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51 WrapperNode [2023-11-17 15:38:51,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:38:51,543 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:38:51,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:38:51,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:38:51,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (1/1) ... [2023-11-17 15:38:51,578 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (1/1) ... [2023-11-17 15:38:51,608 INFO L138 Inliner]: procedures = 171, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2023-11-17 15:38:51,608 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:38:51,609 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:38:51,609 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:38:51,609 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:38:51,618 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (1/1) ... [2023-11-17 15:38:51,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (1/1) ... [2023-11-17 15:38:51,632 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (1/1) ... [2023-11-17 15:38:51,632 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (1/1) ... [2023-11-17 15:38:51,637 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (1/1) ... [2023-11-17 15:38:51,657 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (1/1) ... [2023-11-17 15:38:51,659 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (1/1) ... [2023-11-17 15:38:51,661 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (1/1) ... [2023-11-17 15:38:51,663 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:38:51,664 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:38:51,664 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:38:51,664 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:38:51,665 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (1/1) ... [2023-11-17 15:38:51,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:38:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:38:51,711 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 15:38:51,739 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 15:38:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:38:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:38:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:38:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:38:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:38:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:38:51,748 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:38:51,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:38:51,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:38:51,749 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:38:51,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:38:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:38:51,750 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 15:38:51,918 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:38:51,920 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:38:52,150 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:38:52,223 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:38:52,223 INFO L307 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-17 15:38:52,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:38:52 BoogieIcfgContainer [2023-11-17 15:38:52,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:38:52,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:38:52,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:38:52,230 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:38:52,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:38:50" (1/3) ... [2023-11-17 15:38:52,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56879db5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:52, skipping insertion in model container [2023-11-17 15:38:52,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:51" (2/3) ... [2023-11-17 15:38:52,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56879db5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:52, skipping insertion in model container [2023-11-17 15:38:52,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:38:52" (3/3) ... [2023-11-17 15:38:52,232 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-11-17 15:38:52,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:38:52,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:38:52,250 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:38:52,305 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:38:52,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 142 transitions, 291 flow [2023-11-17 15:38:52,419 INFO L124 PetriNetUnfolderBase]: 30/206 cut-off events. [2023-11-17 15:38:52,419 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:38:52,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 206 events. 30/206 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 668 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2023-11-17 15:38:52,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 142 transitions, 291 flow [2023-11-17 15:38:52,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 137 transitions, 278 flow [2023-11-17 15:38:52,439 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:38:52,455 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 137 transitions, 278 flow [2023-11-17 15:38:52,466 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 137 transitions, 278 flow [2023-11-17 15:38:52,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 137 transitions, 278 flow [2023-11-17 15:38:52,506 INFO L124 PetriNetUnfolderBase]: 29/201 cut-off events. [2023-11-17 15:38:52,506 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:52,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 201 events. 29/201 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 655 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2023-11-17 15:38:52,511 INFO L119 LiptonReduction]: Number of co-enabled transitions 5740 [2023-11-17 15:38:55,277 INFO L134 LiptonReduction]: Checked pairs total: 13323 [2023-11-17 15:38:55,277 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-11-17 15:38:55,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:38:55,309 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;@84a7703, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:38:55,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:38:55,315 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:38:55,315 INFO L124 PetriNetUnfolderBase]: 5/23 cut-off events. [2023-11-17 15:38:55,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:55,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:55,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:38:55,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:38:55,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 595548585, now seen corresponding path program 1 times [2023-11-17 15:38:55,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:55,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793332165] [2023-11-17 15:38:55,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:55,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:55,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:55,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793332165] [2023-11-17 15:38:55,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793332165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:38:55,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:38:55,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:38:55,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527118930] [2023-11-17 15:38:55,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:38:55,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:38:55,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:38:55,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:38:55,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 263 [2023-11-17 15:38:55,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 55 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:55,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:55,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 263 [2023-11-17 15:38:55,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:38:55,793 INFO L124 PetriNetUnfolderBase]: 241/561 cut-off events. [2023-11-17 15:38:55,793 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:55,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 561 events. 241/561 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2567 event pairs, 0 based on Foata normal form. 32/544 useless extension candidates. Maximal degree in co-relation 1038. Up to 481 conditions per place. [2023-11-17 15:38:55,802 INFO L140 encePairwiseOnDemand]: 245/263 looper letters, 43 selfloop transitions, 2 changer transitions 4/56 dead transitions. [2023-11-17 15:38:55,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 214 flow [2023-11-17 15:38:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:38:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:38:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-11-17 15:38:55,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512040557667934 [2023-11-17 15:38:55,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-11-17 15:38:55,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-11-17 15:38:55,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:38:55,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-11-17 15:38:55,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:55,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:55,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:55,841 INFO L175 Difference]: Start difference. First operand has 43 places, 55 transitions, 114 flow. Second operand 3 states and 356 transitions. [2023-11-17 15:38:55,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 214 flow [2023-11-17 15:38:55,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:38:55,847 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 84 flow [2023-11-17 15:38:55,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-11-17 15:38:55,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-11-17 15:38:55,853 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 84 flow [2023-11-17 15:38:55,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:55,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:55,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:38:55,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:38:55,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:38:55,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1306163881, now seen corresponding path program 1 times [2023-11-17 15:38:55,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:55,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901626516] [2023-11-17 15:38:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:55,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:55,887 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:38:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:55,945 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:38:55,946 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:38:55,947 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:38:55,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:38:55,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:38:55,949 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:38:55,952 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:38:55,952 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:38:55,978 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:38:55,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 185 transitions, 386 flow [2023-11-17 15:38:56,025 INFO L124 PetriNetUnfolderBase]: 51/339 cut-off events. [2023-11-17 15:38:56,026 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:38:56,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 339 events. 51/339 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1292 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 208. Up to 9 conditions per place. [2023-11-17 15:38:56,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 185 transitions, 386 flow [2023-11-17 15:38:56,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 185 transitions, 386 flow [2023-11-17 15:38:56,032 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:38:56,032 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 185 transitions, 386 flow [2023-11-17 15:38:56,033 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 185 transitions, 386 flow [2023-11-17 15:38:56,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 185 transitions, 386 flow [2023-11-17 15:38:56,097 INFO L124 PetriNetUnfolderBase]: 51/339 cut-off events. [2023-11-17 15:38:56,097 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:38:56,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 339 events. 51/339 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1292 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 208. Up to 9 conditions per place. [2023-11-17 15:38:56,110 INFO L119 LiptonReduction]: Number of co-enabled transitions 15744 [2023-11-17 15:38:59,117 INFO L134 LiptonReduction]: Checked pairs total: 40942 [2023-11-17 15:38:59,117 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-11-17 15:38:59,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:38:59,121 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;@84a7703, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:38:59,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:38:59,123 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:38:59,124 INFO L124 PetriNetUnfolderBase]: 5/23 cut-off events. [2023-11-17 15:38:59,124 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:59,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:59,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:38:59,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:38:59,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:59,125 INFO L85 PathProgramCache]: Analyzing trace with hash 957722488, now seen corresponding path program 1 times [2023-11-17 15:38:59,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:59,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275037553] [2023-11-17 15:38:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:59,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:59,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:59,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275037553] [2023-11-17 15:38:59,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275037553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:38:59,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:38:59,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:38:59,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397912217] [2023-11-17 15:38:59,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:38:59,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:38:59,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:59,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:38:59,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:38:59,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 337 [2023-11-17 15:38:59,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 85 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:59,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:59,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 337 [2023-11-17 15:38:59,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:00,244 INFO L124 PetriNetUnfolderBase]: 7606/12145 cut-off events. [2023-11-17 15:39:00,244 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-17 15:39:00,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23888 conditions, 12145 events. 7606/12145 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 77151 event pairs, 3375 based on Foata normal form. 766/11939 useless extension candidates. Maximal degree in co-relation 2314. Up to 11652 conditions per place. [2023-11-17 15:39:00,307 INFO L140 encePairwiseOnDemand]: 314/337 looper letters, 57 selfloop transitions, 2 changer transitions 9/80 dead transitions. [2023-11-17 15:39:00,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 80 transitions, 310 flow [2023-11-17 15:39:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:39:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:39:00,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-11-17 15:39:00,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44906033630069236 [2023-11-17 15:39:00,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-11-17 15:39:00,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-11-17 15:39:00,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:00,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-11-17 15:39:00,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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 15:39:00,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 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 15:39:00,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 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 15:39:00,317 INFO L175 Difference]: Start difference. First operand has 66 places, 85 transitions, 186 flow. Second operand 3 states and 454 transitions. [2023-11-17 15:39:00,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 80 transitions, 310 flow [2023-11-17 15:39:00,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 80 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:39:00,323 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 134 flow [2023-11-17 15:39:00,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-17 15:39:00,324 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-11-17 15:39:00,325 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 134 flow [2023-11-17 15:39:00,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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 15:39:00,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:00,326 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:39:00,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:39:00,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:39:00,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:00,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1507891319, now seen corresponding path program 1 times [2023-11-17 15:39:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:00,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681065035] [2023-11-17 15:39:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:00,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:39:00,367 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:39:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:39:00,391 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:39:00,392 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:39:00,392 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:39:00,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:39:00,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:39:00,400 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:39:00,401 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:39:00,401 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:39:00,438 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:39:00,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 228 transitions, 483 flow [2023-11-17 15:39:00,553 INFO L124 PetriNetUnfolderBase]: 77/507 cut-off events. [2023-11-17 15:39:00,554 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:39:00,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 507 events. 77/507 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2078 event pairs, 1 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 347. Up to 16 conditions per place. [2023-11-17 15:39:00,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 228 transitions, 483 flow [2023-11-17 15:39:00,564 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 228 transitions, 483 flow [2023-11-17 15:39:00,564 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:39:00,565 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 228 transitions, 483 flow [2023-11-17 15:39:00,565 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 228 transitions, 483 flow [2023-11-17 15:39:00,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 228 transitions, 483 flow [2023-11-17 15:39:00,614 INFO L124 PetriNetUnfolderBase]: 77/507 cut-off events. [2023-11-17 15:39:00,615 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:39:00,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 507 events. 77/507 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2078 event pairs, 1 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 347. Up to 16 conditions per place. [2023-11-17 15:39:00,640 INFO L119 LiptonReduction]: Number of co-enabled transitions 29028 [2023-11-17 15:39:04,000 INFO L134 LiptonReduction]: Checked pairs total: 80273 [2023-11-17 15:39:04,000 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-11-17 15:39:04,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:39:04,003 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;@84a7703, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:39:04,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:39:04,006 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:39:04,006 INFO L124 PetriNetUnfolderBase]: 5/23 cut-off events. [2023-11-17 15:39:04,006 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:04,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:04,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:39:04,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:39:04,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:04,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1390500170, now seen corresponding path program 1 times [2023-11-17 15:39:04,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:04,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001931165] [2023-11-17 15:39:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:04,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:04,055 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 15:39:04,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:04,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001931165] [2023-11-17 15:39:04,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001931165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:04,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:39:04,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:39:04,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155631901] [2023-11-17 15:39:04,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:04,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:39:04,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:04,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:39:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:39:04,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 411 [2023-11-17 15:39:04,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 111 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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 15:39:04,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:04,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 411 [2023-11-17 15:39:04,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:23,879 INFO L124 PetriNetUnfolderBase]: 230032/324104 cut-off events. [2023-11-17 15:39:23,880 INFO L125 PetriNetUnfolderBase]: For 3023/3023 co-relation queries the response was YES. [2023-11-17 15:39:24,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636890 conditions, 324104 events. 230032/324104 cut-off events. For 3023/3023 co-relation queries the response was YES. Maximal size of possible extension queue 5129. Compared 2395636 event pairs, 140103 based on Foata normal form. 19043/313039 useless extension candidates. Maximal degree in co-relation 32935. Up to 310689 conditions per place. [2023-11-17 15:39:25,319 INFO L140 encePairwiseOnDemand]: 382/411 looper letters, 81 selfloop transitions, 2 changer transitions 10/104 dead transitions. [2023-11-17 15:39:25,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 104 transitions, 419 flow [2023-11-17 15:39:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:39:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:39:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-11-17 15:39:25,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45417680454176806 [2023-11-17 15:39:25,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-11-17 15:39:25,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-11-17 15:39:25,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:25,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-11-17 15:39:25,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 15:39:25,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 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 15:39:25,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 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 15:39:25,328 INFO L175 Difference]: Start difference. First operand has 86 places, 111 transitions, 249 flow. Second operand 3 states and 560 transitions. [2023-11-17 15:39:25,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 104 transitions, 419 flow [2023-11-17 15:39:25,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 104 transitions, 419 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:39:25,334 INFO L231 Difference]: Finished difference. Result has 89 places, 76 transitions, 180 flow [2023-11-17 15:39:25,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=89, PETRI_TRANSITIONS=76} [2023-11-17 15:39:25,335 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 3 predicate places. [2023-11-17 15:39:25,335 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 180 flow [2023-11-17 15:39:25,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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 15:39:25,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:25,336 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:39:25,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:39:25,336 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:39:25,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:25,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1847964263, now seen corresponding path program 1 times [2023-11-17 15:39:25,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:25,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789083494] [2023-11-17 15:39:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:25,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:39:25,351 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:39:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:39:25,368 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:39:25,369 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:39:25,369 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:39:25,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:39:25,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:39:25,369 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:39:25,370 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:39:25,370 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:39:25,396 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:39:25,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 271 transitions, 582 flow [2023-11-17 15:39:25,488 INFO L124 PetriNetUnfolderBase]: 115/747 cut-off events. [2023-11-17 15:39:25,489 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:39:25,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 747 events. 115/747 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3336 event pairs, 6 based on Foata normal form. 0/627 useless extension candidates. Maximal degree in co-relation 527. Up to 32 conditions per place. [2023-11-17 15:39:25,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 271 transitions, 582 flow [2023-11-17 15:39:25,503 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 271 transitions, 582 flow [2023-11-17 15:39:25,504 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:39:25,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 271 transitions, 582 flow [2023-11-17 15:39:25,504 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 271 transitions, 582 flow [2023-11-17 15:39:25,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 271 transitions, 582 flow [2023-11-17 15:39:25,708 INFO L124 PetriNetUnfolderBase]: 115/747 cut-off events. [2023-11-17 15:39:25,708 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:39:25,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 747 events. 115/747 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3336 event pairs, 6 based on Foata normal form. 0/627 useless extension candidates. Maximal degree in co-relation 527. Up to 32 conditions per place. [2023-11-17 15:39:25,738 INFO L119 LiptonReduction]: Number of co-enabled transitions 45920 [2023-11-17 15:39:29,413 INFO L134 LiptonReduction]: Checked pairs total: 134702 [2023-11-17 15:39:29,413 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-11-17 15:39:29,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:39:29,416 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;@84a7703, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:39:29,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:39:29,418 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:39:29,419 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2023-11-17 15:39:29,419 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:29,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:29,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:39:29,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:39:29,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1891108100, now seen corresponding path program 1 times [2023-11-17 15:39:29,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:29,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437292212] [2023-11-17 15:39:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:29,462 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 15:39:29,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:29,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437292212] [2023-11-17 15:39:29,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437292212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:29,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:39:29,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:39:29,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126581610] [2023-11-17 15:39:29,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:29,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:39:29,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:29,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:39:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:39:29,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 482 [2023-11-17 15:39:29,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 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 15:39:29,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:29,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 482 [2023-11-17 15:39:29,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand