/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_01-simple_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:33:50,789 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:33:50,854 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 15:33:50,879 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:33:50,880 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:33:50,880 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:33:50,881 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:33:50,881 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:33:50,881 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:33:50,884 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:33:50,885 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:33:50,885 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:33:50,885 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:33:50,886 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:33:50,886 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:33:50,886 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:33:50,886 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:33:50,886 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:33:50,886 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:33:50,887 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:33:50,887 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:33:50,887 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:33:50,887 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:33:50,888 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:33:50,888 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:33:50,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:33:50,888 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:33:50,888 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:33:50,888 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:33:50,889 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:33:50,889 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:33:50,889 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:33:50,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:33:51,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:33:51,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:33:51,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:33:51,075 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:33:51,077 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:33:51,077 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-11-17 15:33:52,128 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:33:52,346 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:33:52,348 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-11-17 15:33:52,360 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac0e8f3c9/4afd31b40747431488a3dbebb2ffd91c/FLAG8b1668ed9 [2023-11-17 15:33:52,370 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac0e8f3c9/4afd31b40747431488a3dbebb2ffd91c [2023-11-17 15:33:52,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:33:52,373 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:33:52,374 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:33:52,374 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:33:52,377 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:33:52,377 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,378 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d22ad79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52, skipping insertion in model container [2023-11-17 15:33:52,378 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,414 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:33:52,774 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_01-simple_racing.i[30176,30189] [2023-11-17 15:33:52,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:33:52,799 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:33:52,831 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_01-simple_racing.i[30176,30189] [2023-11-17 15:33:52,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:33:52,866 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:33:52,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52 WrapperNode [2023-11-17 15:33:52,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:33:52,868 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:33:52,868 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:33:52,868 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:33:52,872 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,880 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,893 INFO L138 Inliner]: procedures = 171, calls = 41, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-11-17 15:33:52,893 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:33:52,894 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:33:52,894 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:33:52,894 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:33:52,899 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,901 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,901 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,905 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,907 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,908 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,908 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,910 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:33:52,910 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:33:52,910 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:33:52,910 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:33:52,911 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:33:52,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:33:52,935 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 15:33:52,958 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 15:33:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:33:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:33:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:33:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:33:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:33:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:33:52,973 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:33:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:33:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:33:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:33:52,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:33:52,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:33:52,975 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 15:33:53,055 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:33:53,056 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:33:53,255 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:33:53,280 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:33:53,280 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 15:33:53,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:33:53 BoogieIcfgContainer [2023-11-17 15:33:53,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:33:53,283 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:33:53,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:33:53,285 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:33:53,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:33:52" (1/3) ... [2023-11-17 15:33:53,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c5f67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:53, skipping insertion in model container [2023-11-17 15:33:53,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52" (2/3) ... [2023-11-17 15:33:53,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c5f67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:53, skipping insertion in model container [2023-11-17 15:33:53,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:33:53" (3/3) ... [2023-11-17 15:33:53,286 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2023-11-17 15:33:53,297 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:33:53,297 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:33:53,297 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:33:53,338 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:33:53,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 115 transitions, 237 flow [2023-11-17 15:33:53,408 INFO L124 PetriNetUnfolderBase]: 17/155 cut-off events. [2023-11-17 15:33:53,409 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:33:53,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 155 events. 17/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 374 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-11-17 15:33:53,414 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 115 transitions, 237 flow [2023-11-17 15:33:53,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 110 transitions, 224 flow [2023-11-17 15:33:53,419 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:33:53,428 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 110 transitions, 224 flow [2023-11-17 15:33:53,429 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 110 transitions, 224 flow [2023-11-17 15:33:53,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 110 transitions, 224 flow [2023-11-17 15:33:53,452 INFO L124 PetriNetUnfolderBase]: 16/150 cut-off events. [2023-11-17 15:33:53,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:33:53,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 150 events. 16/150 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 358 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-11-17 15:33:53,454 INFO L119 LiptonReduction]: Number of co-enabled transitions 2852 [2023-11-17 15:33:55,817 INFO L134 LiptonReduction]: Checked pairs total: 4127 [2023-11-17 15:33:55,818 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-11-17 15:33:55,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:33:55,832 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;@66fe319b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:33:55,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:33:55,834 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:33:55,834 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:33:55,834 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:33:55,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:33:55,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:33:55,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:33:55,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:33:55,838 INFO L85 PathProgramCache]: Analyzing trace with hash 15024372, now seen corresponding path program 1 times [2023-11-17 15:33:55,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:33:55,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801649645] [2023-11-17 15:33:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:55,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:33:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:33:55,975 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 15:33:55,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:33:55,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801649645] [2023-11-17 15:33:55,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801649645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:33:55,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:33:55,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:33:55,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329520787] [2023-11-17 15:33:55,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:33:55,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:33:55,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:33:55,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:33:55,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:33:55,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 219 [2023-11-17 15:33:56,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 15:33:56,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:33:56,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 219 [2023-11-17 15:33:56,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:33:56,070 INFO L124 PetriNetUnfolderBase]: 72/174 cut-off events. [2023-11-17 15:33:56,070 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:33:56,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 174 events. 72/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 697 event pairs, 0 based on Foata normal form. 10/166 useless extension candidates. Maximal degree in co-relation 323. Up to 154 conditions per place. [2023-11-17 15:33:56,072 INFO L140 encePairwiseOnDemand]: 207/219 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-17 15:33:56,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 120 flow [2023-11-17 15:33:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:33:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:33:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-11-17 15:33:56,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441400304414003 [2023-11-17 15:33:56,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-11-17 15:33:56,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-11-17 15:33:56,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:33:56,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-11-17 15:33:56,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 15:33:56,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 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 15:33:56,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 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 15:33:56,091 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 64 flow. Second operand 3 states and 290 transitions. [2023-11-17 15:33:56,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 120 flow [2023-11-17 15:33:56,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:33:56,093 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 46 flow [2023-11-17 15:33:56,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-17 15:33:56,097 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-17 15:33:56,097 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 46 flow [2023-11-17 15:33:56,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 15:33:56,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:33:56,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:33:56,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:33:56,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:33:56,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:33:56,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1551479630, now seen corresponding path program 1 times [2023-11-17 15:33:56,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:33:56,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215862963] [2023-11-17 15:33:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:56,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:33:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:33:56,132 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:33:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:33:56,179 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:33:56,179 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:33:56,180 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:33:56,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:33:56,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:33:56,181 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:33:56,183 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:33:56,183 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:33:56,206 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:33:56,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 148 transitions, 312 flow [2023-11-17 15:33:56,255 INFO L124 PetriNetUnfolderBase]: 31/254 cut-off events. [2023-11-17 15:33:56,255 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:33:56,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 254 events. 31/254 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 758 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2023-11-17 15:33:56,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 148 transitions, 312 flow [2023-11-17 15:33:56,260 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 148 transitions, 312 flow [2023-11-17 15:33:56,260 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:33:56,260 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 148 transitions, 312 flow [2023-11-17 15:33:56,261 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 148 transitions, 312 flow [2023-11-17 15:33:56,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 148 transitions, 312 flow [2023-11-17 15:33:56,283 INFO L124 PetriNetUnfolderBase]: 31/254 cut-off events. [2023-11-17 15:33:56,284 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:33:56,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 254 events. 31/254 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 758 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2023-11-17 15:33:56,290 INFO L119 LiptonReduction]: Number of co-enabled transitions 8308 [2023-11-17 15:33:58,729 INFO L134 LiptonReduction]: Checked pairs total: 16367 [2023-11-17 15:33:58,730 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-11-17 15:33:58,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:33:58,732 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;@66fe319b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:33:58,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:33:58,733 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:33:58,733 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:33:58,733 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:33:58,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:33:58,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:33:58,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:33:58,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:33:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash 24620518, now seen corresponding path program 1 times [2023-11-17 15:33:58,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:33:58,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577652921] [2023-11-17 15:33:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:58,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:33:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:33:58,798 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 15:33:58,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:33:58,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577652921] [2023-11-17 15:33:58,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577652921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:33:58,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:33:58,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:33:58,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126630688] [2023-11-17 15:33:58,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:33:58,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:33:58,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:33:58,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:33:58,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:33:58,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 279 [2023-11-17 15:33:58,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 15:33:58,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:33:58,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 279 [2023-11-17 15:33:58,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:33:59,030 INFO L124 PetriNetUnfolderBase]: 1400/2450 cut-off events. [2023-11-17 15:33:59,031 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-17 15:33:59,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4796 conditions, 2450 events. 1400/2450 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 14362 event pairs, 666 based on Foata normal form. 203/2396 useless extension candidates. Maximal degree in co-relation 645. Up to 2292 conditions per place. [2023-11-17 15:33:59,037 INFO L140 encePairwiseOnDemand]: 262/279 looper letters, 29 selfloop transitions, 2 changer transitions 9/49 dead transitions. [2023-11-17 15:33:59,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 192 flow [2023-11-17 15:33:59,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:33:59,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:33:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-11-17 15:33:59,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2023-11-17 15:33:59,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-11-17 15:33:59,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-11-17 15:33:59,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:33:59,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-11-17 15:33:59,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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 15:33:59,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 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 15:33:59,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 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 15:33:59,047 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 126 flow. Second operand 3 states and 363 transitions. [2023-11-17 15:33:59,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 192 flow [2023-11-17 15:33:59,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:33:59,049 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-11-17 15:33:59,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-11-17 15:33:59,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-17 15:33:59,049 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-11-17 15:33:59,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 15:33:59,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:33:59,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:33:59,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:33:59,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:33:59,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:33:59,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1376461375, now seen corresponding path program 1 times [2023-11-17 15:33:59,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:33:59,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034451091] [2023-11-17 15:33:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:59,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:33:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:33:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:33:59,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:33:59,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034451091] [2023-11-17 15:33:59,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034451091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:33:59,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790989163] [2023-11-17 15:33:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:59,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:33:59,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:33:59,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:33:59,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:33:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:33:59,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:33:59,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:33:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:33:59,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:33:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:33:59,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790989163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:33:59,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:33:59,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:33:59,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437057574] [2023-11-17 15:33:59,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:33:59,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:33:59,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:33:59,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:33:59,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:33:59,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 279 [2023-11-17 15:33:59,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 103.28571428571429) internal successors, (723), 7 states have internal predecessors, (723), 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 15:33:59,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:33:59,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 279 [2023-11-17 15:33:59,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:33:59,404 INFO L124 PetriNetUnfolderBase]: 318/653 cut-off events. [2023-11-17 15:33:59,404 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-11-17 15:33:59,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 653 events. 318/653 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3329 event pairs, 44 based on Foata normal form. 77/728 useless extension candidates. Maximal degree in co-relation 883. Up to 386 conditions per place. [2023-11-17 15:33:59,406 INFO L140 encePairwiseOnDemand]: 276/279 looper letters, 41 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-11-17 15:33:59,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 53 transitions, 212 flow [2023-11-17 15:33:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:33:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:33:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 551 transitions. [2023-11-17 15:33:59,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949820788530466 [2023-11-17 15:33:59,408 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 551 transitions. [2023-11-17 15:33:59,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 551 transitions. [2023-11-17 15:33:59,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:33:59,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 551 transitions. [2023-11-17 15:33:59,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 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 15:33:59,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 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 15:33:59,412 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 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 15:33:59,412 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 5 states and 551 transitions. [2023-11-17 15:33:59,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 53 transitions, 212 flow [2023-11-17 15:33:59,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:33:59,415 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-17 15:33:59,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-17 15:33:59,417 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-17 15:33:59,417 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-17 15:33:59,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 103.28571428571429) internal successors, (723), 7 states have internal predecessors, (723), 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 15:33:59,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:33:59,417 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:33:59,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 15:33:59,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:33:59,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:33:59,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:33:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2143165610, now seen corresponding path program 1 times [2023-11-17 15:33:59,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:33:59,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19123549] [2023-11-17 15:33:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:59,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:33:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:33:59,649 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:33:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:33:59,669 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:33:59,669 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:33:59,669 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:33:59,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:33:59,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:33:59,669 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:33:59,670 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:33:59,670 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:33:59,685 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:33:59,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 181 transitions, 389 flow [2023-11-17 15:33:59,713 INFO L124 PetriNetUnfolderBase]: 50/388 cut-off events. [2023-11-17 15:33:59,713 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:33:59,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 388 events. 50/388 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1307 event pairs, 1 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 262. Up to 16 conditions per place. [2023-11-17 15:33:59,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 181 transitions, 389 flow [2023-11-17 15:33:59,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 181 transitions, 389 flow [2023-11-17 15:33:59,717 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:33:59,717 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 181 transitions, 389 flow [2023-11-17 15:33:59,717 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 181 transitions, 389 flow [2023-11-17 15:33:59,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 181 transitions, 389 flow [2023-11-17 15:33:59,742 INFO L124 PetriNetUnfolderBase]: 50/388 cut-off events. [2023-11-17 15:33:59,742 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:33:59,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 388 events. 50/388 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1307 event pairs, 1 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 262. Up to 16 conditions per place. [2023-11-17 15:33:59,751 INFO L119 LiptonReduction]: Number of co-enabled transitions 15624 [2023-11-17 15:34:02,435 INFO L134 LiptonReduction]: Checked pairs total: 32871 [2023-11-17 15:34:02,435 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-11-17 15:34:02,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:34:02,437 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;@66fe319b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:34:02,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:34:02,439 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:34:02,439 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-17 15:34:02,439 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:02,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:02,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:34:02,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:02,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:02,439 INFO L85 PathProgramCache]: Analyzing trace with hash 36001261, now seen corresponding path program 1 times [2023-11-17 15:34:02,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:02,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219533213] [2023-11-17 15:34:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:02,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:02,474 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 15:34:02,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:02,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219533213] [2023-11-17 15:34:02,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219533213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:34:02,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:34:02,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:34:02,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006723117] [2023-11-17 15:34:02,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:34:02,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:34:02,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:02,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:34:02,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:34:02,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 337 [2023-11-17 15:34:02,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 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 15:34:02,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:02,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 337 [2023-11-17 15:34:02,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:05,305 INFO L124 PetriNetUnfolderBase]: 35760/51505 cut-off events. [2023-11-17 15:34:05,306 INFO L125 PetriNetUnfolderBase]: For 1359/1359 co-relation queries the response was YES. [2023-11-17 15:34:05,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102477 conditions, 51505 events. 35760/51505 cut-off events. For 1359/1359 co-relation queries the response was YES. Maximal size of possible extension queue 1151. Compared 332581 event pairs, 23163 based on Foata normal form. 3948/51340 useless extension candidates. Maximal degree in co-relation 7819. Up to 50139 conditions per place. [2023-11-17 15:34:05,511 INFO L140 encePairwiseOnDemand]: 314/337 looper letters, 46 selfloop transitions, 2 changer transitions 10/65 dead transitions. [2023-11-17 15:34:05,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 271 flow [2023-11-17 15:34:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:34:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:34:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-11-17 15:34:05,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391691394658754 [2023-11-17 15:34:05,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-11-17 15:34:05,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-11-17 15:34:05,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:05,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-11-17 15:34:05,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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 15:34:05,515 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 15:34:05,516 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 15:34:05,516 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 175 flow. Second operand 3 states and 444 transitions. [2023-11-17 15:34:05,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 271 flow [2023-11-17 15:34:05,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:34:05,518 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 118 flow [2023-11-17 15:34:05,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-11-17 15:34:05,521 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-17 15:34:05,522 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 118 flow [2023-11-17 15:34:05,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 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 15:34:05,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:05,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:34:05,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:34:05,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:05,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2016717298, now seen corresponding path program 1 times [2023-11-17 15:34:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:05,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116482378] [2023-11-17 15:34:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:05,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:05,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:05,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116482378] [2023-11-17 15:34:05,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116482378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:34:05,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475798153] [2023-11-17 15:34:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:05,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:34:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:34:05,561 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:34:05,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:34:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:05,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:34:05,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:34:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:05,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:34:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:05,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475798153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:34:05,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:34:05,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:34:05,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875549908] [2023-11-17 15:34:05,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:34:05,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:34:05,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:05,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:34:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:34:05,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 337 [2023-11-17 15:34:05,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 122.28571428571429) internal successors, (856), 7 states have internal predecessors, (856), 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 15:34:05,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:05,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 337 [2023-11-17 15:34:05,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:06,470 INFO L124 PetriNetUnfolderBase]: 8408/13373 cut-off events. [2023-11-17 15:34:06,470 INFO L125 PetriNetUnfolderBase]: For 4820/4820 co-relation queries the response was YES. [2023-11-17 15:34:06,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27073 conditions, 13373 events. 8408/13373 cut-off events. For 4820/4820 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 88293 event pairs, 0 based on Foata normal form. 1210/14582 useless extension candidates. Maximal degree in co-relation 2773. Up to 8160 conditions per place. [2023-11-17 15:34:06,525 INFO L140 encePairwiseOnDemand]: 334/337 looper letters, 90 selfloop transitions, 4 changer transitions 0/101 dead transitions. [2023-11-17 15:34:06,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 101 transitions, 418 flow [2023-11-17 15:34:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:34:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:34:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 817 transitions. [2023-11-17 15:34:06,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.404055390702275 [2023-11-17 15:34:06,527 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 817 transitions. [2023-11-17 15:34:06,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 817 transitions. [2023-11-17 15:34:06,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:06,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 817 transitions. [2023-11-17 15:34:06,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.16666666666666) internal successors, (817), 6 states have internal predecessors, (817), 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 15:34:06,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 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 15:34:06,532 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 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 15:34:06,532 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 118 flow. Second operand 6 states and 817 transitions. [2023-11-17 15:34:06,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 101 transitions, 418 flow [2023-11-17 15:34:06,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 101 transitions, 414 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:34:06,535 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-17 15:34:06,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-17 15:34:06,536 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-17 15:34:06,536 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-17 15:34:06,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.28571428571429) internal successors, (856), 7 states have internal predecessors, (856), 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 15:34:06,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:06,537 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:34:06,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 15:34:06,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-17 15:34:06,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:06,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:06,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1714755109, now seen corresponding path program 1 times [2023-11-17 15:34:06,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:06,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692210982] [2023-11-17 15:34:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:06,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:06,759 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:34:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:06,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:34:06,777 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:34:06,777 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:34:06,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:34:06,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:34:06,778 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:34:06,778 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:34:06,778 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:34:06,802 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:34:06,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 214 transitions, 468 flow [2023-11-17 15:34:06,850 INFO L124 PetriNetUnfolderBase]: 81/594 cut-off events. [2023-11-17 15:34:06,850 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:34:06,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 594 events. 81/594 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2301 event pairs, 6 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 408. Up to 32 conditions per place. [2023-11-17 15:34:06,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 214 transitions, 468 flow [2023-11-17 15:34:06,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 214 transitions, 468 flow [2023-11-17 15:34:06,856 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:34:06,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 214 transitions, 468 flow [2023-11-17 15:34:06,856 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 214 transitions, 468 flow [2023-11-17 15:34:06,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 214 transitions, 468 flow [2023-11-17 15:34:06,901 INFO L124 PetriNetUnfolderBase]: 81/594 cut-off events. [2023-11-17 15:34:06,902 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:34:06,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 594 events. 81/594 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2301 event pairs, 6 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 408. Up to 32 conditions per place. [2023-11-17 15:34:06,917 INFO L119 LiptonReduction]: Number of co-enabled transitions 25048 [2023-11-17 15:34:10,015 INFO L134 LiptonReduction]: Checked pairs total: 55600 [2023-11-17 15:34:10,016 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-11-17 15:34:10,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:34:10,017 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;@66fe319b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:34:10,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:34:10,018 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:34:10,018 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-17 15:34:10,018 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:10,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:10,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:34:10,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:10,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:10,019 INFO L85 PathProgramCache]: Analyzing trace with hash 49260593, now seen corresponding path program 1 times [2023-11-17 15:34:10,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:10,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211023656] [2023-11-17 15:34:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:10,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:10,033 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 15:34:10,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:10,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211023656] [2023-11-17 15:34:10,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211023656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:34:10,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:34:10,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:34:10,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270915443] [2023-11-17 15:34:10,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:34:10,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:34:10,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:34:10,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:34:10,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 398 [2023-11-17 15:34:10,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:34:10,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:10,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 398 [2023-11-17 15:34:10,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:32,436 INFO L124 PetriNetUnfolderBase]: 269247/375498 cut-off events. [2023-11-17 15:34:32,436 INFO L125 PetriNetUnfolderBase]: For 14224/14224 co-relation queries the response was YES. [2023-11-17 15:34:32,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734666 conditions, 375498 events. 269247/375498 cut-off events. For 14224/14224 co-relation queries the response was YES. Maximal size of possible extension queue 7874. Compared 2951065 event pairs, 197983 based on Foata normal form. 35455/386149 useless extension candidates. Maximal degree in co-relation 63025. Up to 351895 conditions per place. [2023-11-17 15:34:33,713 INFO L140 encePairwiseOnDemand]: 369/398 looper letters, 49 selfloop transitions, 2 changer transitions 11/77 dead transitions. [2023-11-17 15:34:33,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 316 flow [2023-11-17 15:34:33,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:34:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:34:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-11-17 15:34:33,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42797319932998323 [2023-11-17 15:34:33,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-11-17 15:34:33,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-11-17 15:34:33,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:33,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-11-17 15:34:33,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 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 15:34:33,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 15:34:33,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 15:34:33,726 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 226 flow. Second operand 3 states and 511 transitions. [2023-11-17 15:34:33,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 316 flow [2023-11-17 15:34:33,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:34:33,733 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 152 flow [2023-11-17 15:34:33,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-11-17 15:34:33,734 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-11-17 15:34:33,735 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 152 flow [2023-11-17 15:34:33,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:34:33,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:33,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:34:33,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:34:33,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:33,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:33,735 INFO L85 PathProgramCache]: Analyzing trace with hash -434865483, now seen corresponding path program 1 times [2023-11-17 15:34:33,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:33,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189789362] [2023-11-17 15:34:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:33,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:33,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:33,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189789362] [2023-11-17 15:34:33,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189789362] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:34:33,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284289355] [2023-11-17 15:34:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:33,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:34:33,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:34:33,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:34:33,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 15:34:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:33,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:34:33,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:34:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:33,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:34:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:33,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284289355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:34:33,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:34:33,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:34:33,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908018682] [2023-11-17 15:34:33,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:34:33,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:34:33,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:33,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:34:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:34:33,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 398 [2023-11-17 15:34:33,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 141.28571428571428) internal successors, (989), 7 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:34:33,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:33,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 398 [2023-11-17 15:34:33,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:42,922 INFO L124 PetriNetUnfolderBase]: 123661/166363 cut-off events. [2023-11-17 15:34:42,922 INFO L125 PetriNetUnfolderBase]: For 14562/14562 co-relation queries the response was YES. [2023-11-17 15:34:43,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343173 conditions, 166363 events. 123661/166363 cut-off events. For 14562/14562 co-relation queries the response was YES. Maximal size of possible extension queue 4015. Compared 1162286 event pairs, 5184 based on Foata normal form. 729/167092 useless extension candidates. Maximal degree in co-relation 39041. Up to 105949 conditions per place. [2023-11-17 15:34:43,762 INFO L140 encePairwiseOnDemand]: 394/398 looper letters, 119 selfloop transitions, 6 changer transitions 0/140 dead transitions. [2023-11-17 15:34:43,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 140 transitions, 572 flow [2023-11-17 15:34:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:34:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:34:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 962 transitions. [2023-11-17 15:34:43,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028475711892797 [2023-11-17 15:34:43,766 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 962 transitions. [2023-11-17 15:34:43,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 962 transitions. [2023-11-17 15:34:43,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:43,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 962 transitions. [2023-11-17 15:34:43,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.33333333333334) internal successors, (962), 6 states have internal predecessors, (962), 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 15:34:43,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 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 15:34:43,770 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 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 15:34:43,771 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 152 flow. Second operand 6 states and 962 transitions. [2023-11-17 15:34:43,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 140 transitions, 572 flow [2023-11-17 15:34:43,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 140 transitions, 564 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 15:34:43,794 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 184 flow [2023-11-17 15:34:43,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-11-17 15:34:43,795 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-11-17 15:34:43,795 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 184 flow [2023-11-17 15:34:43,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.28571428571428) internal successors, (989), 7 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:34:43,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:43,796 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:34:43,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 15:34:44,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:34:44,003 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:44,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash 531916673, now seen corresponding path program 1 times [2023-11-17 15:34:44,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:44,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884537273] [2023-11-17 15:34:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:44,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:44,015 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:34:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:44,023 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:34:44,023 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:34:44,023 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:34:44,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:34:44,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:34:44,024 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:34:44,024 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:34:44,024 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:34:44,074 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 15:34:44,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 247 transitions, 549 flow [2023-11-17 15:34:44,224 INFO L124 PetriNetUnfolderBase]: 140/948 cut-off events. [2023-11-17 15:34:44,224 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:34:44,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 948 events. 140/948 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4398 event pairs, 23 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 639. Up to 80 conditions per place. [2023-11-17 15:34:44,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 247 transitions, 549 flow [2023-11-17 15:34:44,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 247 transitions, 549 flow [2023-11-17 15:34:44,254 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:34:44,254 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 247 transitions, 549 flow [2023-11-17 15:34:44,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 247 transitions, 549 flow [2023-11-17 15:34:44,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 247 transitions, 549 flow [2023-11-17 15:34:44,378 INFO L124 PetriNetUnfolderBase]: 140/948 cut-off events. [2023-11-17 15:34:44,378 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:34:44,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 948 events. 140/948 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4398 event pairs, 23 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 639. Up to 80 conditions per place. [2023-11-17 15:34:44,406 INFO L119 LiptonReduction]: Number of co-enabled transitions 36580 [2023-11-17 15:34:47,692 INFO L134 LiptonReduction]: Checked pairs total: 82869 [2023-11-17 15:34:47,693 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-11-17 15:34:47,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:34:47,699 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;@66fe319b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:34:47,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:34:47,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:34:47,700 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:34:47,700 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:47,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:47,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:34:47,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:47,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash 64367847, now seen corresponding path program 1 times [2023-11-17 15:34:47,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:47,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353069738] [2023-11-17 15:34:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:47,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:47,736 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 15:34:47,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:47,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353069738] [2023-11-17 15:34:47,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353069738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:34:47,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:34:47,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:34:47,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801336028] [2023-11-17 15:34:47,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:34:47,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:34:47,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:47,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:34:47,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:34:47,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 458 [2023-11-17 15:34:47,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:34:47,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:47,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 458 [2023-11-17 15:34:47,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand