/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:35:26,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:35:26,412 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:35:26,441 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:35:26,442 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:35:26,442 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:35:26,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:35:26,443 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:35:26,443 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:35:26,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:35:26,444 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:35:26,444 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:35:26,445 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:35:26,445 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:35:26,445 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:35:26,445 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:35:26,446 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:35:26,446 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:35:26,446 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:35:26,447 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:35:26,447 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:35:26,449 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:35:26,450 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:35:26,450 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:35:26,450 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:35:26,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:35:26,451 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:35:26,452 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:35:26,452 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:35:26,452 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:35:26,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:35:26,453 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:35:26,453 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:35:26,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:35:26,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:35:26,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:35:26,673 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:35:26,674 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:35:26,674 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-11-17 11:35:27,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:35:28,053 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:35:28,054 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-11-17 11:35:28,071 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3de1eba72/0c45a546267c4b8b85851e42e0ae1f38/FLAG0b59ceab8 [2023-11-17 11:35:28,085 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3de1eba72/0c45a546267c4b8b85851e42e0ae1f38 [2023-11-17 11:35:28,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:35:28,088 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:35:28,089 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:35:28,089 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:35:28,093 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:35:28,093 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf86eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28, skipping insertion in model container [2023-11-17 11:35:28,094 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,149 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:35:28,387 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2023-11-17 11:35:28,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:35:28,419 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:35:28,463 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2023-11-17 11:35:28,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:35:28,523 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:35:28,523 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28 WrapperNode [2023-11-17 11:35:28,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:35:28,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:35:28,525 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:35:28,525 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:35:28,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,557 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,579 INFO L138 Inliner]: procedures = 171, calls = 41, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-11-17 11:35:28,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:35:28,580 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:35:28,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:35:28,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:35:28,589 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,600 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,605 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,609 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,610 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,611 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,613 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:35:28,614 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:35:28,614 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:35:28,614 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:35:28,615 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (1/1) ... [2023-11-17 11:35:28,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:35:28,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:35:28,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:35:28,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:35:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:35:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:35:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:35:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:35:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:35:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:35:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:35:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:35:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:35:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:35:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:35:28,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:35:28,680 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:35:28,812 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:35:28,813 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:35:28,987 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:35:29,129 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:35:29,130 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 11:35:29,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:35:29 BoogieIcfgContainer [2023-11-17 11:35:29,131 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:35:29,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:35:29,133 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:35:29,136 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:35:29,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:35:28" (1/3) ... [2023-11-17 11:35:29,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec56c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:35:29, skipping insertion in model container [2023-11-17 11:35:29,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:28" (2/3) ... [2023-11-17 11:35:29,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec56c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:35:29, skipping insertion in model container [2023-11-17 11:35:29,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:35:29" (3/3) ... [2023-11-17 11:35:29,138 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2023-11-17 11:35:29,178 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:35:29,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:35:29,179 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:35:29,218 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:35:29,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 49 transitions, 105 flow [2023-11-17 11:35:29,293 INFO L124 PetriNetUnfolderBase]: 13/69 cut-off events. [2023-11-17 11:35:29,293 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:35:29,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 69 events. 13/69 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 230 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 44. Up to 4 conditions per place. [2023-11-17 11:35:29,299 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 49 transitions, 105 flow [2023-11-17 11:35:29,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 47 transitions, 98 flow [2023-11-17 11:35:29,313 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:29,332 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 47 transitions, 98 flow [2023-11-17 11:35:29,334 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 47 transitions, 98 flow [2023-11-17 11:35:29,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 47 transitions, 98 flow [2023-11-17 11:35:29,348 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2023-11-17 11:35:29,348 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:29,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 67 events. 12/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 224 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 44. Up to 4 conditions per place. [2023-11-17 11:35:29,349 INFO L119 LiptonReduction]: Number of co-enabled transitions 1012 [2023-11-17 11:35:29,971 INFO L134 LiptonReduction]: Checked pairs total: 2138 [2023-11-17 11:35:29,972 INFO L136 LiptonReduction]: Total number of compositions: 33 [2023-11-17 11:35:29,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:29,996 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;@874ad44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:29,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:30,002 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:30,002 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 11:35:30,002 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:30,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:30,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:30,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:30,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:30,007 INFO L85 PathProgramCache]: Analyzing trace with hash 10726622, now seen corresponding path program 1 times [2023-11-17 11:35:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:30,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250561220] [2023-11-17 11:35:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:30,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250561220] [2023-11-17 11:35:30,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250561220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:30,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:30,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:30,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682987354] [2023-11-17 11:35:30,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:30,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:30,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:30,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:30,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 82 [2023-11-17 11:35:30,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:30,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:30,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 82 [2023-11-17 11:35:30,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:30,359 INFO L124 PetriNetUnfolderBase]: 72/174 cut-off events. [2023-11-17 11:35:30,359 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:30,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 174 events. 72/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 695 event pairs, 0 based on Foata normal form. 10/166 useless extension candidates. Maximal degree in co-relation 323. Up to 154 conditions per place. [2023-11-17 11:35:30,362 INFO L140 encePairwiseOnDemand]: 69/82 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-17 11:35:30,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 120 flow [2023-11-17 11:35:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:35:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:35:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-17 11:35:30,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2023-11-17 11:35:30,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-17 11:35:30,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-17 11:35:30,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:30,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-17 11:35:30,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:30,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:30,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:30,383 INFO L175 Difference]: Start difference. First operand has 25 places, 31 transitions, 66 flow. Second operand 3 states and 90 transitions. [2023-11-17 11:35:30,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 120 flow [2023-11-17 11:35:30,385 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 11:35:30,386 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 46 flow [2023-11-17 11:35:30,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, 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 11:35:30,390 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-17 11:35:30,391 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 46 flow [2023-11-17 11:35:30,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:30,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:30,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:35:30,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:35:30,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:30,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1665293491, now seen corresponding path program 1 times [2023-11-17 11:35:30,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:30,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843843501] [2023-11-17 11:35:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:30,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:30,435 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:35:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:30,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:35:30,488 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:35:30,489 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:35:30,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:35:30,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:35:30,491 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:35:30,493 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:35:30,493 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:35:30,513 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:35:30,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:30,540 INFO L124 PetriNetUnfolderBase]: 24/121 cut-off events. [2023-11-17 11:35:30,541 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:35:30,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 121 events. 24/121 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 479 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2023-11-17 11:35:30,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:30,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:30,546 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:30,546 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:30,547 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:30,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:30,559 INFO L124 PetriNetUnfolderBase]: 24/121 cut-off events. [2023-11-17 11:35:30,560 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:35:30,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 121 events. 24/121 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 479 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2023-11-17 11:35:30,563 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-11-17 11:35:31,348 INFO L134 LiptonReduction]: Checked pairs total: 8915 [2023-11-17 11:35:31,348 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-11-17 11:35:31,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:31,351 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;@874ad44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:31,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:31,353 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:31,353 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 11:35:31,353 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:31,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:31,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:31,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:31,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:31,354 INFO L85 PathProgramCache]: Analyzing trace with hash 14053219, now seen corresponding path program 1 times [2023-11-17 11:35:31,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:31,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894730806] [2023-11-17 11:35:31,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:31,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:31,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:31,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894730806] [2023-11-17 11:35:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894730806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:31,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:31,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:31,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841177830] [2023-11-17 11:35:31,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:31,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:31,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:31,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 126 [2023-11-17 11:35:31,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 49 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:31,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:31,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 126 [2023-11-17 11:35:31,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:31,632 INFO L124 PetriNetUnfolderBase]: 1642/2708 cut-off events. [2023-11-17 11:35:31,632 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-17 11:35:31,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5444 conditions, 2708 events. 1642/2708 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13402 event pairs, 1515 based on Foata normal form. 214/2632 useless extension candidates. Maximal degree in co-relation 3832. Up to 2673 conditions per place. [2023-11-17 11:35:31,642 INFO L140 encePairwiseOnDemand]: 109/126 looper letters, 32 selfloop transitions, 2 changer transitions 8/45 dead transitions. [2023-11-17 11:35:31,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 190 flow [2023-11-17 11:35:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:35:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:35:31,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 132 transitions. [2023-11-17 11:35:31,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2023-11-17 11:35:31,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 132 transitions. [2023-11-17 11:35:31,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 132 transitions. [2023-11-17 11:35:31,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:31,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 132 transitions. [2023-11-17 11:35:31,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:31,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:31,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:31,648 INFO L175 Difference]: Start difference. First operand has 38 places, 49 transitions, 114 flow. Second operand 3 states and 132 transitions. [2023-11-17 11:35:31,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 190 flow [2023-11-17 11:35:31,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:35:31,650 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 76 flow [2023-11-17 11:35:31,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-11-17 11:35:31,651 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-11-17 11:35:31,651 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 76 flow [2023-11-17 11:35:31,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:31,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:31,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:35:31,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:35:31,652 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:31,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash -550104234, now seen corresponding path program 1 times [2023-11-17 11:35:31,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:31,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128711721] [2023-11-17 11:35:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:31,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:31,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:31,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128711721] [2023-11-17 11:35:31,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128711721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:35:31,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236586459] [2023-11-17 11:35:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:31,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:35:31,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:35:31,727 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:35:31,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:35:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:31,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:35:31,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:35:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:31,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:35:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:31,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236586459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:35:31,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:35:31,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:35:31,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613039801] [2023-11-17 11:35:31,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:35:31,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:35:31,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:31,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:35:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:35:31,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 126 [2023-11-17 11:35:31,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:31,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:31,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 126 [2023-11-17 11:35:31,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:32,037 INFO L124 PetriNetUnfolderBase]: 376/676 cut-off events. [2023-11-17 11:35:32,037 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-17 11:35:32,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 676 events. 376/676 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2795 event pairs, 63 based on Foata normal form. 90/766 useless extension candidates. Maximal degree in co-relation 162. Up to 450 conditions per place. [2023-11-17 11:35:32,041 INFO L140 encePairwiseOnDemand]: 123/126 looper letters, 45 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-11-17 11:35:32,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 216 flow [2023-11-17 11:35:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:35:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:35:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2023-11-17 11:35:32,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2619047619047619 [2023-11-17 11:35:32,043 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 165 transitions. [2023-11-17 11:35:32,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 165 transitions. [2023-11-17 11:35:32,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:32,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 165 transitions. [2023-11-17 11:35:32,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:32,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:32,046 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:32,046 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 76 flow. Second operand 5 states and 165 transitions. [2023-11-17 11:35:32,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 216 flow [2023-11-17 11:35:32,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:35:32,048 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 72 flow [2023-11-17 11:35:32,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-11-17 11:35:32,049 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-11-17 11:35:32,049 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 72 flow [2023-11-17 11:35:32,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:32,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:32,049 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:35:32,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 11:35:32,255 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 11:35:32,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:32,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:32,256 INFO L85 PathProgramCache]: Analyzing trace with hash -452962043, now seen corresponding path program 1 times [2023-11-17 11:35:32,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:32,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942125155] [2023-11-17 11:35:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:32,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:32,272 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:35:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:32,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:35:32,293 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:35:32,295 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:35:32,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:35:32,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:35:32,295 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:35:32,297 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:35:32,297 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:35:32,319 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:35:32,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:32,337 INFO L124 PetriNetUnfolderBase]: 38/184 cut-off events. [2023-11-17 11:35:32,337 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:35:32,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 184 events. 38/184 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 780 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 132. Up to 12 conditions per place. [2023-11-17 11:35:32,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:32,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:32,340 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:32,340 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:32,340 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:32,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:32,355 INFO L124 PetriNetUnfolderBase]: 38/184 cut-off events. [2023-11-17 11:35:32,356 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:35:32,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 184 events. 38/184 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 780 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 132. Up to 12 conditions per place. [2023-11-17 11:35:32,361 INFO L119 LiptonReduction]: Number of co-enabled transitions 6762 [2023-11-17 11:35:33,272 INFO L134 LiptonReduction]: Checked pairs total: 16531 [2023-11-17 11:35:33,272 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-11-17 11:35:33,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:33,275 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;@874ad44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:33,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:33,277 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:33,277 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 11:35:33,277 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:33,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:33,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:33,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:33,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:33,278 INFO L85 PathProgramCache]: Analyzing trace with hash 18731432, now seen corresponding path program 1 times [2023-11-17 11:35:33,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:33,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122629415] [2023-11-17 11:35:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:33,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:33,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:33,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122629415] [2023-11-17 11:35:33,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122629415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:33,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:33,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:33,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39156746] [2023-11-17 11:35:33,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:33,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:33,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:33,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:33,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 165 [2023-11-17 11:35:33,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 67 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:33,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:33,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 165 [2023-11-17 11:35:33,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:36,064 INFO L124 PetriNetUnfolderBase]: 23815/33875 cut-off events. [2023-11-17 11:35:36,064 INFO L125 PetriNetUnfolderBase]: For 1031/1031 co-relation queries the response was YES. [2023-11-17 11:35:36,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68173 conditions, 33875 events. 23815/33875 cut-off events. For 1031/1031 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 199010 event pairs, 22652 based on Foata normal form. 3053/34181 useless extension candidates. Maximal degree in co-relation 26598. Up to 33630 conditions per place. [2023-11-17 11:35:36,207 INFO L140 encePairwiseOnDemand]: 141/165 looper letters, 41 selfloop transitions, 2 changer transitions 9/56 dead transitions. [2023-11-17 11:35:36,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 243 flow [2023-11-17 11:35:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:35:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:35:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-11-17 11:35:36,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34949494949494947 [2023-11-17 11:35:36,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-11-17 11:35:36,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-11-17 11:35:36,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:36,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-11-17 11:35:36,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:36,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:36,214 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:36,214 INFO L175 Difference]: Start difference. First operand has 50 places, 67 transitions, 161 flow. Second operand 3 states and 173 transitions. [2023-11-17 11:35:36,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 243 flow [2023-11-17 11:35:36,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:35:36,219 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 104 flow [2023-11-17 11:35:36,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2023-11-17 11:35:36,222 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-11-17 11:35:36,222 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 104 flow [2023-11-17 11:35:36,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:36,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:36,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:35:36,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:35:36,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:36,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:36,224 INFO L85 PathProgramCache]: Analyzing trace with hash 512370793, now seen corresponding path program 1 times [2023-11-17 11:35:36,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:36,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369003804] [2023-11-17 11:35:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:36,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:36,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:36,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369003804] [2023-11-17 11:35:36,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369003804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:35:36,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803303115] [2023-11-17 11:35:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:36,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:35:36,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:35:36,289 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 11:35:36,316 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 11:35:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:36,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:35:36,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:35:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:36,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:35:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:36,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803303115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:35:36,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:35:36,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:35:36,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802621885] [2023-11-17 11:35:36,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:35:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:35:36,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:35:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:35:36,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 165 [2023-11-17 11:35:36,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:36,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:36,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 165 [2023-11-17 11:35:36,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:37,102 INFO L124 PetriNetUnfolderBase]: 5560/8266 cut-off events. [2023-11-17 11:35:37,102 INFO L125 PetriNetUnfolderBase]: For 2060/2060 co-relation queries the response was YES. [2023-11-17 11:35:37,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17474 conditions, 8266 events. 5560/8266 cut-off events. For 2060/2060 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 44259 event pairs, 637 based on Foata normal form. 819/9084 useless extension candidates. Maximal degree in co-relation 15411. Up to 5346 conditions per place. [2023-11-17 11:35:37,144 INFO L140 encePairwiseOnDemand]: 162/165 looper letters, 79 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-11-17 11:35:37,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 87 transitions, 368 flow [2023-11-17 11:35:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:35:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:35:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 272 transitions. [2023-11-17 11:35:37,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27474747474747474 [2023-11-17 11:35:37,146 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 272 transitions. [2023-11-17 11:35:37,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 272 transitions. [2023-11-17 11:35:37,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:37,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 272 transitions. [2023-11-17 11:35:37,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 45.333333333333336) internal successors, (272), 6 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:37,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:37,150 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:37,150 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 104 flow. Second operand 6 states and 272 transitions. [2023-11-17 11:35:37,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 87 transitions, 368 flow [2023-11-17 11:35:37,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 87 transitions, 364 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:35:37,153 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 104 flow [2023-11-17 11:35:37,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-11-17 11:35:37,153 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-11-17 11:35:37,154 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 104 flow [2023-11-17 11:35:37,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:37,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:37,154 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:35:37,163 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 11:35:37,360 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 11:35:37,361 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:37,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:37,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1125121810, now seen corresponding path program 1 times [2023-11-17 11:35:37,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:37,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969747173] [2023-11-17 11:35:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:37,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:37,388 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:35:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:37,410 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:35:37,410 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:35:37,410 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:35:37,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:35:37,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:35:37,411 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:35:37,412 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:35:37,412 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:35:37,438 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:35:37,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:37,469 INFO L124 PetriNetUnfolderBase]: 60/271 cut-off events. [2023-11-17 11:35:37,469 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:35:37,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 271 events. 60/271 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1234 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 208. Up to 32 conditions per place. [2023-11-17 11:35:37,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:37,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:37,473 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:37,474 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:37,474 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:37,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:37,500 INFO L124 PetriNetUnfolderBase]: 60/271 cut-off events. [2023-11-17 11:35:37,501 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:35:37,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 271 events. 60/271 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1234 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 208. Up to 32 conditions per place. [2023-11-17 11:35:37,511 INFO L119 LiptonReduction]: Number of co-enabled transitions 11408 [2023-11-17 11:35:38,762 INFO L134 LiptonReduction]: Checked pairs total: 31766 [2023-11-17 11:35:38,762 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-11-17 11:35:38,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:38,767 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;@874ad44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:38,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:38,769 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:38,769 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 11:35:38,769 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:38,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:38,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:38,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:38,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash 24608302, now seen corresponding path program 1 times [2023-11-17 11:35:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:38,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370494119] [2023-11-17 11:35:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:38,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:38,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370494119] [2023-11-17 11:35:38,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370494119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:38,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:38,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:38,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732682092] [2023-11-17 11:35:38,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:38,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:38,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:38,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:38,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:38,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 211 [2023-11-17 11:35:38,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 83 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:38,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:38,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 211 [2023-11-17 11:35:38,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:03,237 INFO L124 PetriNetUnfolderBase]: 302884/397589 cut-off events. [2023-11-17 11:36:03,238 INFO L125 PetriNetUnfolderBase]: For 15712/15712 co-relation queries the response was YES. [2023-11-17 11:36:03,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800958 conditions, 397589 events. 302884/397589 cut-off events. For 15712/15712 co-relation queries the response was YES. Maximal size of possible extension queue 7078. Compared 2569509 event pairs, 223134 based on Foata normal form. 38508/410338 useless extension candidates. Maximal degree in co-relation 68283. Up to 395355 conditions per place. [2023-11-17 11:36:04,874 INFO L140 encePairwiseOnDemand]: 182/211 looper letters, 50 selfloop transitions, 2 changer transitions 10/67 dead transitions. [2023-11-17 11:36:04,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 298 flow [2023-11-17 11:36:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:36:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:36:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-11-17 11:36:04,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.334913112164297 [2023-11-17 11:36:04,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-11-17 11:36:04,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-11-17 11:36:04,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:04,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-11-17 11:36:04,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:04,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:04,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:04,882 INFO L175 Difference]: Start difference. First operand has 62 places, 83 transitions, 206 flow. Second operand 3 states and 212 transitions. [2023-11-17 11:36:04,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 298 flow [2023-11-17 11:36:04,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:36:04,891 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 134 flow [2023-11-17 11:36:04,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2023-11-17 11:36:04,893 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2023-11-17 11:36:04,894 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 134 flow [2023-11-17 11:36:04,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:04,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:04,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:36:04,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:36:04,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:04,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:04,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1313463420, now seen corresponding path program 1 times [2023-11-17 11:36:04,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:04,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872186376] [2023-11-17 11:36:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:04,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:36:04,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:04,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872186376] [2023-11-17 11:36:04,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872186376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:36:04,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525904909] [2023-11-17 11:36:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:04,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:36:04,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:36:04,947 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 11:36:04,970 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 11:36:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:05,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:36:05,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:36:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:36:05,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:36:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:36:05,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525904909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:36:05,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:36:05,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:36:05,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098704320] [2023-11-17 11:36:05,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:36:05,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:36:05,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:05,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:36:05,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:36:05,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 211 [2023-11-17 11:36:05,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 41.285714285714285) internal successors, (289), 7 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:05,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:05,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 211 [2023-11-17 11:36:05,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:14,982 INFO L124 PetriNetUnfolderBase]: 139696/184468 cut-off events. [2023-11-17 11:36:14,983 INFO L125 PetriNetUnfolderBase]: For 29745/29745 co-relation queries the response was YES. [2023-11-17 11:36:15,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383946 conditions, 184468 events. 139696/184468 cut-off events. For 29745/29745 co-relation queries the response was YES. Maximal size of possible extension queue 3929. Compared 1143851 event pairs, 16738 based on Foata normal form. 819/185277 useless extension candidates. Maximal degree in co-relation 340191. Up to 119557 conditions per place. [2023-11-17 11:36:15,993 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 123 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2023-11-17 11:36:15,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 134 transitions, 568 flow [2023-11-17 11:36:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:36:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:36:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2023-11-17 11:36:15,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2890995260663507 [2023-11-17 11:36:15,995 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2023-11-17 11:36:15,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2023-11-17 11:36:15,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:15,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2023-11-17 11:36:15,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:15,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:15,999 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:15,999 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 134 flow. Second operand 6 states and 366 transitions. [2023-11-17 11:36:15,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 134 transitions, 568 flow [2023-11-17 11:36:16,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 134 transitions, 560 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 11:36:16,009 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 166 flow [2023-11-17 11:36:16,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2023-11-17 11:36:16,010 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2023-11-17 11:36:16,010 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 166 flow [2023-11-17 11:36:16,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.285714285714285) internal successors, (289), 7 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:16,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:16,010 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:36:16,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 11:36:16,215 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 11:36:16,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:16,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:16,216 INFO L85 PathProgramCache]: Analyzing trace with hash -666730777, now seen corresponding path program 1 times [2023-11-17 11:36:16,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:16,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537667217] [2023-11-17 11:36:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:16,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:16,237 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:36:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:16,264 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:36:16,264 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:36:16,264 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:36:16,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:36:16,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:36:16,264 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:36:16,265 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:36:16,265 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:36:16,296 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 11:36:16,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:16,337 INFO L124 PetriNetUnfolderBase]: 102/410 cut-off events. [2023-11-17 11:36:16,337 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:36:16,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 410 events. 102/410 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1972 event pairs, 23 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 321. Up to 80 conditions per place. [2023-11-17 11:36:16,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:16,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:16,344 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:36:16,345 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:16,345 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:16,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:16,379 INFO L124 PetriNetUnfolderBase]: 102/410 cut-off events. [2023-11-17 11:36:16,380 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:36:16,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 410 events. 102/410 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1972 event pairs, 23 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 321. Up to 80 conditions per place. [2023-11-17 11:36:16,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 17250 [2023-11-17 11:36:18,081 INFO L134 LiptonReduction]: Checked pairs total: 43525 [2023-11-17 11:36:18,082 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-11-17 11:36:18,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:36:18,084 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;@874ad44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:36:18,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:36:18,085 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:36:18,085 INFO L124 PetriNetUnfolderBase]: 3/11 cut-off events. [2023-11-17 11:36:18,085 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:36:18,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:18,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:36:18,086 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:18,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:18,086 INFO L85 PathProgramCache]: Analyzing trace with hash 31907956, now seen corresponding path program 1 times [2023-11-17 11:36:18,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:18,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395317593] [2023-11-17 11:36:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:18,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:36:18,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:18,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395317593] [2023-11-17 11:36:18,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395317593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:36:18,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:36:18,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:36:18,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416942563] [2023-11-17 11:36:18,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:36:18,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:36:18,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:18,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:36:18,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:36:18,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 249 [2023-11-17 11:36:18,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 101 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:18,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:18,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 249 [2023-11-17 11:36:18,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand