/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_02-simple_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:33:51,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:33:51,087 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:33:51,112 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:33:51,113 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:33:51,114 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:33:51,114 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:33:51,115 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:33:51,115 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:33:51,118 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:33:51,119 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:33:51,119 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:33:51,119 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:33:51,119 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:33:51,120 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:33:51,120 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:33:51,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:33:51,120 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:33:51,120 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:33:51,121 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:33:51,121 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:33:51,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:33:51,122 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:33:51,122 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:33:51,122 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:33:51,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:33:51,122 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:33:51,122 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:33:51,123 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:33:51,123 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:33:51,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:33:51,124 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:33:51,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:33:51,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:33:51,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:33:51,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:33:51,304 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:33:51,304 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:33:51,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-11-17 15:33:52,301 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:33:52,516 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:33:52,517 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-11-17 15:33:52,529 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adffb493b/36eb6e18681242b5add1e754ce39745f/FLAG2aa05784a [2023-11-17 15:33:52,539 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adffb493b/36eb6e18681242b5add1e754ce39745f [2023-11-17 15:33:52,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:33:52,541 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:33:52,542 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:33:52,542 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:33:52,549 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:33:52,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34348349 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 15:33:52,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:52" (1/1) ... [2023-11-17 15:33:52,581 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:33:52,819 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_02-simple_racefree.i[30176,30189] [2023-11-17 15:33:52,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:33:52,850 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:33:52,890 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_02-simple_racefree.i[30176,30189] [2023-11-17 15:33:52,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:33:52,934 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:33:52,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:52 WrapperNode [2023-11-17 15:33:52,935 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:33:52,936 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:33:52,936 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:33:52,936 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:33:52,941 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 15:33:52,971 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 15:33:52,986 INFO L138 Inliner]: procedures = 171, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2023-11-17 15:33:52,986 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:33:52,987 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:33:52,987 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:33:52,987 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:33:52,995 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 15:33:52,995 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 15:33:52,997 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 15:33:52,997 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 15:33:53,002 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 15:33:53,005 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 15:33:53,006 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 15:33:53,007 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 15:33:53,009 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:33:53,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:33:53,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:33:53,009 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:33:53,010 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 15:33:53,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:33:53,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:33:53,031 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 15:33:53,045 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 15:33:53,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:33:53,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:33:53,059 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:33:53,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:33:53,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:33:53,059 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:33:53,059 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:33:53,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:33:53,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:33:53,059 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:33:53,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:33:53,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:33:53,060 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 15:33:53,170 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:33:53,171 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:33:53,458 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:33:53,497 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:33:53,497 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 15:33:53,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:33:53 BoogieIcfgContainer [2023-11-17 15:33:53,498 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:33:53,499 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:33:53,499 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:33:53,502 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:33:53,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:33:52" (1/3) ... [2023-11-17 15:33:53,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320a227b 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 15:33:53,502 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 15:33:53,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320a227b 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 15:33:53,502 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 15:33:53,503 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2023-11-17 15:33:53,519 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:33:53,519 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:33:53,520 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:33:53,561 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:33:53,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 118 transitions, 243 flow [2023-11-17 15:33:53,655 INFO L124 PetriNetUnfolderBase]: 17/158 cut-off events. [2023-11-17 15:33:53,655 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:33:53,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 158 events. 17/158 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 375 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-11-17 15:33:53,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 118 transitions, 243 flow [2023-11-17 15:33:53,669 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 113 transitions, 230 flow [2023-11-17 15:33:53,676 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:33:53,687 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 113 transitions, 230 flow [2023-11-17 15:33:53,689 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 113 transitions, 230 flow [2023-11-17 15:33:53,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 113 transitions, 230 flow [2023-11-17 15:33:53,711 INFO L124 PetriNetUnfolderBase]: 16/153 cut-off events. [2023-11-17 15:33:53,711 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:33:53,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 153 events. 16/153 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-11-17 15:33:53,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 2852 [2023-11-17 15:33:56,028 INFO L134 LiptonReduction]: Checked pairs total: 4060 [2023-11-17 15:33:56,028 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-11-17 15:33:56,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:33:56,044 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;@54594104, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:33:56,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:33:56,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:33:56,047 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:33:56,047 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:33:56,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:33:56,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:33:56,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:33:56,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:33:56,051 INFO L85 PathProgramCache]: Analyzing trace with hash 15270585, now seen corresponding path program 1 times [2023-11-17 15:33:56,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:33:56,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112373209] [2023-11-17 15:33:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:56,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:33:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:33:56,204 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 15:33:56,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:33:56,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112373209] [2023-11-17 15:33:56,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112373209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:33:56,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:33:56,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:33:56,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840627971] [2023-11-17 15:33:56,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:33:56,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:33:56,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:33:56,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:33:56,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:33:56,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 224 [2023-11-17 15:33:56,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 15:33:56,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:33:56,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 224 [2023-11-17 15:33:56,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:33:56,278 INFO L124 PetriNetUnfolderBase]: 72/167 cut-off events. [2023-11-17 15:33:56,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:33:56,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 167 events. 72/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 529 event pairs, 56 based on Foata normal form. 10/159 useless extension candidates. Maximal degree in co-relation 323. Up to 154 conditions per place. [2023-11-17 15:33:56,280 INFO L140 encePairwiseOnDemand]: 212/224 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-17 15:33:56,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 120 flow [2023-11-17 15:33:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:33:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:33:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-11-17 15:33:56,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44494047619047616 [2023-11-17 15:33:56,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-11-17 15:33:56,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-11-17 15:33:56,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:33:56,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-11-17 15:33:56,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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 15:33:56,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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 15:33:56,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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 15:33:56,303 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 64 flow. Second operand 3 states and 299 transitions. [2023-11-17 15:33:56,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 120 flow [2023-11-17 15:33:56,305 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 15:33:56,306 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 46 flow [2023-11-17 15:33:56,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, 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 15:33:56,310 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-17 15:33:56,310 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 46 flow [2023-11-17 15:33:56,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 15:33:56,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:33:56,310 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:33:56,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:33:56,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:33:56,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:33:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1786236746, now seen corresponding path program 1 times [2023-11-17 15:33:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:33:56,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704826772] [2023-11-17 15:33:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:33:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:33:56,328 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:33:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:33:56,350 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:33:56,350 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:33:56,351 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:33:56,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:33:56,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:33:56,353 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:33:56,354 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:33:56,354 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:33:56,367 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:33:56,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 151 transitions, 318 flow [2023-11-17 15:33:56,415 INFO L124 PetriNetUnfolderBase]: 31/257 cut-off events. [2023-11-17 15:33:56,415 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:33:56,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 257 events. 31/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 759 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2023-11-17 15:33:56,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 151 transitions, 318 flow [2023-11-17 15:33:56,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 151 transitions, 318 flow [2023-11-17 15:33:56,419 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:33:56,419 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 151 transitions, 318 flow [2023-11-17 15:33:56,419 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 151 transitions, 318 flow [2023-11-17 15:33:56,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 151 transitions, 318 flow [2023-11-17 15:33:56,450 INFO L124 PetriNetUnfolderBase]: 31/257 cut-off events. [2023-11-17 15:33:56,451 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:33:56,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 257 events. 31/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 759 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2023-11-17 15:33:56,457 INFO L119 LiptonReduction]: Number of co-enabled transitions 8308 [2023-11-17 15:33:58,839 INFO L134 LiptonReduction]: Checked pairs total: 16413 [2023-11-17 15:33:58,839 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-11-17 15:33:58,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:33:58,842 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;@54594104, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:33:58,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:33:58,844 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:33:58,844 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:33:58,844 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:33:58,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:33:58,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:33:58,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:33:58,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:33:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash 25081187, now seen corresponding path program 1 times [2023-11-17 15:33:58,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:33:58,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663158254] [2023-11-17 15:33:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:58,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:33:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:33:58,911 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 15:33:58,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:33:58,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663158254] [2023-11-17 15:33:58,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663158254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:33:58,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:33:58,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:33:58,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148039354] [2023-11-17 15:33:58,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:33:58,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:33:58,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:33:58,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:33:58,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:33:58,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 286 [2023-11-17 15:33:58,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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 15:33:58,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:33:58,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 286 [2023-11-17 15:33:58,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:33:59,135 INFO L124 PetriNetUnfolderBase]: 1400/2526 cut-off events. [2023-11-17 15:33:59,136 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-17 15:33:59,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4872 conditions, 2526 events. 1400/2526 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 14968 event pairs, 1146 based on Foata normal form. 203/2468 useless extension candidates. Maximal degree in co-relation 2551. Up to 2292 conditions per place. [2023-11-17 15:33:59,144 INFO L140 encePairwiseOnDemand]: 269/286 looper letters, 29 selfloop transitions, 2 changer transitions 9/49 dead transitions. [2023-11-17 15:33:59,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 192 flow [2023-11-17 15:33:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:33:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:33:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-11-17 15:33:59,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43356643356643354 [2023-11-17 15:33:59,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-11-17 15:33:59,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-11-17 15:33:59,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:33:59,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-11-17 15:33:59,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 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 15:33:59,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 15:33:59,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 15:33:59,153 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 126 flow. Second operand 3 states and 372 transitions. [2023-11-17 15:33:59,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 192 flow [2023-11-17 15:33:59,154 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 15:33:59,155 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-11-17 15:33:59,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, 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 15:33:59,155 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-17 15:33:59,156 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-11-17 15:33:59,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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 15:33:59,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:33:59,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:33:59,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:33:59,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:33:59,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:33:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash -394272204, now seen corresponding path program 1 times [2023-11-17 15:33:59,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:33:59,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652667391] [2023-11-17 15:33:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:59,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:33:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:33:59,204 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 15:33:59,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:33:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652667391] [2023-11-17 15:33:59,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652667391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:33:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666522681] [2023-11-17 15:33:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:59,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:33:59,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:33:59,207 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 15:33:59,231 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 15:33:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:33:59,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:33:59,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:33:59,330 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 15:33:59,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:33:59,342 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 15:33:59,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666522681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:33:59,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:33:59,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:33:59,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638294616] [2023-11-17 15:33:59,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:33:59,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:33:59,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:33:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:33:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:33:59,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 286 [2023-11-17 15:33:59,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 106.28571428571429) internal successors, (744), 7 states have internal predecessors, (744), 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 15:33:59,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:33:59,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 286 [2023-11-17 15:33:59,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:33:59,428 INFO L124 PetriNetUnfolderBase]: 318/648 cut-off events. [2023-11-17 15:33:59,428 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-11-17 15:33:59,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1313 conditions, 648 events. 318/648 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3364 event pairs, 0 based on Foata normal form. 77/725 useless extension candidates. Maximal degree in co-relation 190. Up to 386 conditions per place. [2023-11-17 15:33:59,431 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 41 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-11-17 15:33:59,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 53 transitions, 212 flow [2023-11-17 15:33:59,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:33:59,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:33:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 566 transitions. [2023-11-17 15:33:59,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958041958041958 [2023-11-17 15:33:59,433 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 566 transitions. [2023-11-17 15:33:59,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 566 transitions. [2023-11-17 15:33:59,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:33:59,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 566 transitions. [2023-11-17 15:33:59,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 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 15:33:59,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 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 15:33:59,436 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 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 15:33:59,437 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 5 states and 566 transitions. [2023-11-17 15:33:59,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 53 transitions, 212 flow [2023-11-17 15:33:59,438 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 15:33:59,439 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-17 15:33:59,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, 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 15:33:59,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-17 15:33:59,441 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-17 15:33:59,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.28571428571429) internal successors, (744), 7 states have internal predecessors, (744), 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 15:33:59,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:33:59,442 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:33:59,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 15:33:59,646 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 15:33:59,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:33:59,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:33:59,647 INFO L85 PathProgramCache]: Analyzing trace with hash 814102990, now seen corresponding path program 1 times [2023-11-17 15:33:59,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:33:59,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268511346] [2023-11-17 15:33:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:33:59,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:33:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:33:59,667 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:33:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:33:59,691 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:33:59,691 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:33:59,691 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:33:59,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:33:59,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:33:59,692 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:33:59,692 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:33:59,692 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:33:59,718 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:33:59,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 184 transitions, 395 flow [2023-11-17 15:33:59,748 INFO L124 PetriNetUnfolderBase]: 50/391 cut-off events. [2023-11-17 15:33:59,748 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:33:59,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 391 events. 50/391 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1300 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2023-11-17 15:33:59,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 184 transitions, 395 flow [2023-11-17 15:33:59,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 184 transitions, 395 flow [2023-11-17 15:33:59,751 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:33:59,753 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 184 transitions, 395 flow [2023-11-17 15:33:59,756 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 184 transitions, 395 flow [2023-11-17 15:33:59,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 184 transitions, 395 flow [2023-11-17 15:33:59,780 INFO L124 PetriNetUnfolderBase]: 50/391 cut-off events. [2023-11-17 15:33:59,780 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:33:59,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 391 events. 50/391 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1300 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2023-11-17 15:33:59,789 INFO L119 LiptonReduction]: Number of co-enabled transitions 15624 [2023-11-17 15:34:02,392 INFO L134 LiptonReduction]: Checked pairs total: 32507 [2023-11-17 15:34:02,393 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-11-17 15:34:02,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:34:02,395 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;@54594104, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:34:02,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:34:02,396 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:34:02,396 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:34:02,396 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:02,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:02,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:34:02,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:02,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:02,397 INFO L85 PathProgramCache]: Analyzing trace with hash 36616881, now seen corresponding path program 1 times [2023-11-17 15:34:02,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:02,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256564844] [2023-11-17 15:34:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:02,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:02,445 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 15:34:02,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:02,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256564844] [2023-11-17 15:34:02,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256564844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:34:02,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:34:02,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:34:02,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238143576] [2023-11-17 15:34:02,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:34:02,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:34:02,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:02,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:34:02,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:34:02,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 342 [2023-11-17 15:34:02,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 15:34:02,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:02,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 342 [2023-11-17 15:34:02,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:05,733 INFO L124 PetriNetUnfolderBase]: 35760/51525 cut-off events. [2023-11-17 15:34:05,734 INFO L125 PetriNetUnfolderBase]: For 1363/1363 co-relation queries the response was YES. [2023-11-17 15:34:05,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102497 conditions, 51525 events. 35760/51525 cut-off events. For 1363/1363 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 332688 event pairs, 23163 based on Foata normal form. 3948/51370 useless extension candidates. Maximal degree in co-relation 7819. Up to 50139 conditions per place. [2023-11-17 15:34:05,895 INFO L140 encePairwiseOnDemand]: 319/342 looper letters, 46 selfloop transitions, 2 changer transitions 10/65 dead transitions. [2023-11-17 15:34:05,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 271 flow [2023-11-17 15:34:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:34:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:34:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-11-17 15:34:05,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415204678362573 [2023-11-17 15:34:05,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-11-17 15:34:05,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-11-17 15:34:05,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:05,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-11-17 15:34:05,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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 15:34:05,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 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 15:34:05,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 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 15:34:05,900 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 175 flow. Second operand 3 states and 453 transitions. [2023-11-17 15:34:05,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 271 flow [2023-11-17 15:34:05,902 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 15:34:05,902 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 118 flow [2023-11-17 15:34:05,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, 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 15:34:05,905 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-17 15:34:05,905 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 118 flow [2023-11-17 15:34:05,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 15:34:05,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:05,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:34:05,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:34:05,906 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:05,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:05,907 INFO L85 PathProgramCache]: Analyzing trace with hash 41207691, now seen corresponding path program 1 times [2023-11-17 15:34:05,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:05,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77071344] [2023-11-17 15:34:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:05,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:05,956 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 15:34:05,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:05,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77071344] [2023-11-17 15:34:05,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77071344] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:34:05,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653827090] [2023-11-17 15:34:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:05,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:34:05,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:34:05,983 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 15:34:06,025 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 15:34:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:06,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:34:06,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:34:06,072 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 15:34:06,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:34:06,084 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 15:34:06,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653827090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:34:06,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:34:06,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:34:06,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263280438] [2023-11-17 15:34:06,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:34:06,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:34:06,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:34:06,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:34:06,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 342 [2023-11-17 15:34:06,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 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 15:34:06,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:06,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 342 [2023-11-17 15:34:06,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:06,969 INFO L124 PetriNetUnfolderBase]: 8408/13373 cut-off events. [2023-11-17 15:34:06,969 INFO L125 PetriNetUnfolderBase]: For 4820/4820 co-relation queries the response was YES. [2023-11-17 15:34:06,992 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 88184 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 15:34:07,051 INFO L140 encePairwiseOnDemand]: 339/342 looper letters, 90 selfloop transitions, 4 changer transitions 0/101 dead transitions. [2023-11-17 15:34:07,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 101 transitions, 418 flow [2023-11-17 15:34:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:34:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:34:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 835 transitions. [2023-11-17 15:34:07,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40692007797270957 [2023-11-17 15:34:07,054 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 835 transitions. [2023-11-17 15:34:07,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 835 transitions. [2023-11-17 15:34:07,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:07,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 835 transitions. [2023-11-17 15:34:07,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.16666666666666) internal successors, (835), 6 states have internal predecessors, (835), 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 15:34:07,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 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 15:34:07,061 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 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 15:34:07,062 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 118 flow. Second operand 6 states and 835 transitions. [2023-11-17 15:34:07,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 101 transitions, 418 flow [2023-11-17 15:34:07,067 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 15:34:07,069 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-17 15:34:07,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, 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 15:34:07,074 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-17 15:34:07,074 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-17 15:34:07,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 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 15:34:07,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:07,075 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:34:07,080 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 15:34:07,280 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 15:34:07,281 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:07,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:07,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1949251590, now seen corresponding path program 1 times [2023-11-17 15:34:07,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:07,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382483355] [2023-11-17 15:34:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:07,309 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:34:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:07,334 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:34:07,334 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:34:07,335 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:34:07,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:34:07,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:34:07,335 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:34:07,336 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:34:07,336 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:34:07,368 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:34:07,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 217 transitions, 474 flow [2023-11-17 15:34:07,420 INFO L124 PetriNetUnfolderBase]: 81/597 cut-off events. [2023-11-17 15:34:07,420 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:34:07,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 597 events. 81/597 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2317 event pairs, 6 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 411. Up to 32 conditions per place. [2023-11-17 15:34:07,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 217 transitions, 474 flow [2023-11-17 15:34:07,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 217 transitions, 474 flow [2023-11-17 15:34:07,429 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:34:07,429 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 217 transitions, 474 flow [2023-11-17 15:34:07,429 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 217 transitions, 474 flow [2023-11-17 15:34:07,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 217 transitions, 474 flow [2023-11-17 15:34:07,475 INFO L124 PetriNetUnfolderBase]: 81/597 cut-off events. [2023-11-17 15:34:07,475 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:34:07,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 597 events. 81/597 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2317 event pairs, 6 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 411. Up to 32 conditions per place. [2023-11-17 15:34:07,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 25048 [2023-11-17 15:34:10,782 INFO L134 LiptonReduction]: Checked pairs total: 56120 [2023-11-17 15:34:10,783 INFO L136 LiptonReduction]: Total number of compositions: 187 [2023-11-17 15:34:10,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:34:10,784 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;@54594104, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:34:10,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:34:10,786 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:34:10,786 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-17 15:34:10,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:10,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:10,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:34:10,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:10,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:10,787 INFO L85 PathProgramCache]: Analyzing trace with hash 50060885, now seen corresponding path program 1 times [2023-11-17 15:34:10,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:10,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734553770] [2023-11-17 15:34:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:10,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:10,802 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 15:34:10,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:10,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734553770] [2023-11-17 15:34:10,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734553770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:34:10,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:34:10,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:34:10,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752444572] [2023-11-17 15:34:10,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:34:10,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:34:10,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:10,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:34:10,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:34:10,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 404 [2023-11-17 15:34:10,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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 15:34:10,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:10,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 404 [2023-11-17 15:34:10,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:36,443 INFO L124 PetriNetUnfolderBase]: 269247/375498 cut-off events. [2023-11-17 15:34:36,444 INFO L125 PetriNetUnfolderBase]: For 14224/14224 co-relation queries the response was YES. [2023-11-17 15:34:37,010 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 2947744 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 15:34:37,837 INFO L140 encePairwiseOnDemand]: 375/404 looper letters, 49 selfloop transitions, 2 changer transitions 11/77 dead transitions. [2023-11-17 15:34:37,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 316 flow [2023-11-17 15:34:37,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:34:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:34:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2023-11-17 15:34:37,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429042904290429 [2023-11-17 15:34:37,839 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2023-11-17 15:34:37,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2023-11-17 15:34:37,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:37,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2023-11-17 15:34:37,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 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 15:34:37,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 15:34:37,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 15:34:37,842 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 226 flow. Second operand 3 states and 520 transitions. [2023-11-17 15:34:37,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 316 flow [2023-11-17 15:34:37,846 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 15:34:37,847 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 152 flow [2023-11-17 15:34:37,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, 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 15:34:37,847 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-11-17 15:34:37,847 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 152 flow [2023-11-17 15:34:37,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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 15:34:37,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:37,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:34:37,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:34:37,848 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:37,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash -404276104, now seen corresponding path program 1 times [2023-11-17 15:34:37,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:37,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074709990] [2023-11-17 15:34:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:37,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:37,870 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 15:34:37,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:37,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074709990] [2023-11-17 15:34:37,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074709990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:34:37,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526369593] [2023-11-17 15:34:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:37,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:34:37,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:34:37,876 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 15:34:37,877 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 15:34:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:37,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:34:37,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:34:37,954 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 15:34:37,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:34:37,969 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 15:34:37,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526369593] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:34:37,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:34:37,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:34:37,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455098782] [2023-11-17 15:34:37,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:34:37,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:34:37,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:37,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:34:37,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:34:37,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 404 [2023-11-17 15:34:37,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 144.28571428571428) internal successors, (1010), 7 states have internal predecessors, (1010), 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 15:34:37,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:37,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 404 [2023-11-17 15:34:37,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:47,259 INFO L124 PetriNetUnfolderBase]: 123661/166948 cut-off events. [2023-11-17 15:34:47,260 INFO L125 PetriNetUnfolderBase]: For 19899/19899 co-relation queries the response was YES. [2023-11-17 15:34:47,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343758 conditions, 166948 events. 123661/166948 cut-off events. For 19899/19899 co-relation queries the response was YES. Maximal size of possible extension queue 4036. Compared 1172200 event pairs, 8226 based on Foata normal form. 729/167677 useless extension candidates. Maximal degree in co-relation 39106. Up to 105949 conditions per place. [2023-11-17 15:34:48,227 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 119 selfloop transitions, 6 changer transitions 0/140 dead transitions. [2023-11-17 15:34:48,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 140 transitions, 572 flow [2023-11-17 15:34:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:34:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:34:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 980 transitions. [2023-11-17 15:34:48,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042904290429043 [2023-11-17 15:34:48,230 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 980 transitions. [2023-11-17 15:34:48,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 980 transitions. [2023-11-17 15:34:48,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:48,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 980 transitions. [2023-11-17 15:34:48,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.33333333333334) internal successors, (980), 6 states have internal predecessors, (980), 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 15:34:48,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 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 15:34:48,235 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 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 15:34:48,235 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 152 flow. Second operand 6 states and 980 transitions. [2023-11-17 15:34:48,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 140 transitions, 572 flow [2023-11-17 15:34:48,242 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 15:34:48,243 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 184 flow [2023-11-17 15:34:48,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, 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 15:34:48,244 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-11-17 15:34:48,244 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 184 flow [2023-11-17 15:34:48,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.28571428571428) internal successors, (1010), 7 states have internal predecessors, (1010), 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 15:34:48,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:48,244 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:34:48,262 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 15:34:48,448 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 15:34:48,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:48,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:48,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1265429929, now seen corresponding path program 1 times [2023-11-17 15:34:48,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:48,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30130386] [2023-11-17 15:34:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:48,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:48,461 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:34:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:48,484 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:34:48,484 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:34:48,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:34:48,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:34:48,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:34:48,485 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:34:48,485 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:34:48,485 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:34:48,513 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 15:34:48,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 250 transitions, 555 flow [2023-11-17 15:34:48,588 INFO L124 PetriNetUnfolderBase]: 140/951 cut-off events. [2023-11-17 15:34:48,588 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:34:48,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 951 events. 140/951 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4408 event pairs, 23 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 642. Up to 80 conditions per place. [2023-11-17 15:34:48,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 250 transitions, 555 flow [2023-11-17 15:34:48,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 250 transitions, 555 flow [2023-11-17 15:34:48,599 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:34:48,599 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 221 places, 250 transitions, 555 flow [2023-11-17 15:34:48,599 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 221 places, 250 transitions, 555 flow [2023-11-17 15:34:48,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 250 transitions, 555 flow [2023-11-17 15:34:48,674 INFO L124 PetriNetUnfolderBase]: 140/951 cut-off events. [2023-11-17 15:34:48,675 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:34:48,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 951 events. 140/951 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4408 event pairs, 23 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 642. Up to 80 conditions per place. [2023-11-17 15:34:48,700 INFO L119 LiptonReduction]: Number of co-enabled transitions 36580 [2023-11-17 15:34:52,362 INFO L134 LiptonReduction]: Checked pairs total: 89532 [2023-11-17 15:34:52,362 INFO L136 LiptonReduction]: Total number of compositions: 213 [2023-11-17 15:34:52,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:34:52,364 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;@54594104, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:34:52,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:34:52,365 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:34:52,365 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-17 15:34:52,365 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:52,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:52,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:34:52,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:52,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash 65322129, now seen corresponding path program 1 times [2023-11-17 15:34:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:52,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915191874] [2023-11-17 15:34:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:52,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:52,398 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 15:34:52,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:52,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915191874] [2023-11-17 15:34:52,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915191874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:34:52,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:34:52,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:34:52,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107764137] [2023-11-17 15:34:52,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:34:52,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:34:52,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:52,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:34:52,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:34:52,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 463 [2023-11-17 15:34:52,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 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 15:34:52,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:52,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 463 [2023-11-17 15:34:52,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand