/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:01:33,201 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:01:33,260 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 16:01:33,278 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:01:33,278 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:01:33,278 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:01:33,279 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:01:33,279 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:01:33,279 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:01:33,280 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:01:33,280 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:01:33,280 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:01:33,280 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:01:33,280 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:01:33,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:01:33,281 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:01:33,281 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:01:33,281 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:01:33,281 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:01:33,282 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:01:33,282 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:01:33,285 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:01:33,285 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:01:33,285 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:01:33,285 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:01:33,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:01:33,286 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:01:33,286 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:01:33,286 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:01:33,286 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:01:33,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:01:33,287 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:01:33,287 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:01:33,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:01:33,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:01:33,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:01:33,497 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:01:33,498 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:01:33,499 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c [2023-11-17 16:01:34,500 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:01:34,656 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:01:34,657 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c [2023-11-17 16:01:34,662 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edbd009c2/1c59627fa96c4b64942ff8c6841f0ed4/FLAG559a7e92b [2023-11-17 16:01:34,677 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edbd009c2/1c59627fa96c4b64942ff8c6841f0ed4 [2023-11-17 16:01:34,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:01:34,680 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:01:34,683 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:01:34,683 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:01:34,686 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:01:34,687 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eed288d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34, skipping insertion in model container [2023-11-17 16:01:34,688 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,712 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:01:34,851 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c[3538,3551] [2023-11-17 16:01:34,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:01:34,862 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:01:34,875 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c[3538,3551] [2023-11-17 16:01:34,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:01:34,881 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:01:34,881 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:01:34,886 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:01:34,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34 WrapperNode [2023-11-17 16:01:34,886 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:01:34,887 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:01:34,887 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:01:34,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:01:34,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,900 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,916 INFO L138 Inliner]: procedures = 21, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 156 [2023-11-17 16:01:34,917 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:01:34,917 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:01:34,917 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:01:34,917 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:01:34,923 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,926 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:01:34,938 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:01:34,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:01:34,938 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:01:34,939 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (1/1) ... [2023-11-17 16:01:34,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:01:34,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:01:34,972 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 16:01:34,976 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 16:01:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:01:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:01:34,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:01:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:01:34,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:01:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:01:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:01:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:01:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:01:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:01:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:01:34,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:01:34,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:01:34,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:01:34,996 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 16:01:35,060 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:01:35,062 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:01:35,200 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:01:35,252 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:01:35,252 INFO L307 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-17 16:01:35,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:01:35 BoogieIcfgContainer [2023-11-17 16:01:35,253 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:01:35,255 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:01:35,255 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:01:35,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:01:35,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:01:34" (1/3) ... [2023-11-17 16:01:35,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a93be7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:01:35, skipping insertion in model container [2023-11-17 16:01:35,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:01:34" (2/3) ... [2023-11-17 16:01:35,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a93be7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:01:35, skipping insertion in model container [2023-11-17 16:01:35,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:01:35" (3/3) ... [2023-11-17 16:01:35,259 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-2.wvr.c [2023-11-17 16:01:35,270 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:01:35,270 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:01:35,270 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:01:35,328 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:01:35,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 113 transitions, 240 flow [2023-11-17 16:01:35,401 INFO L124 PetriNetUnfolderBase]: 2/111 cut-off events. [2023-11-17 16:01:35,401 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:01:35,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 111 events. 2/111 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-11-17 16:01:35,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 113 transitions, 240 flow [2023-11-17 16:01:35,407 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 102 transitions, 216 flow [2023-11-17 16:01:35,409 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:01:35,421 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 102 transitions, 216 flow [2023-11-17 16:01:35,427 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 102 transitions, 216 flow [2023-11-17 16:01:35,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 102 transitions, 216 flow [2023-11-17 16:01:35,470 INFO L124 PetriNetUnfolderBase]: 2/102 cut-off events. [2023-11-17 16:01:35,470 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:01:35,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 2/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-11-17 16:01:35,471 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-11-17 16:01:37,651 INFO L134 LiptonReduction]: Checked pairs total: 2880 [2023-11-17 16:01:37,651 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-11-17 16:01:37,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:01:37,666 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;@36323481, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:01:37,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:01:37,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:01:37,670 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-11-17 16:01:37,670 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:01:37,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:37,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:37,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:37,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:37,674 INFO L85 PathProgramCache]: Analyzing trace with hash 365311656, now seen corresponding path program 1 times [2023-11-17 16:01:37,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:37,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456793476] [2023-11-17 16:01:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:37,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:38,034 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 16:01:38,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:38,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456793476] [2023-11-17 16:01:38,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456793476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:01:38,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:01:38,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:01:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033733000] [2023-11-17 16:01:38,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:01:38,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:01:38,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:38,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:01:38,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:01:38,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 199 [2023-11-17 16:01:38,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 91.28571428571429) internal successors, (639), 7 states have internal predecessors, (639), 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 16:01:38,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:38,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 199 [2023-11-17 16:01:38,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:38,310 INFO L124 PetriNetUnfolderBase]: 217/431 cut-off events. [2023-11-17 16:01:38,310 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-17 16:01:38,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 431 events. 217/431 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1559 event pairs, 91 based on Foata normal form. 1/432 useless extension candidates. Maximal degree in co-relation 756. Up to 152 conditions per place. [2023-11-17 16:01:38,313 INFO L140 encePairwiseOnDemand]: 193/199 looper letters, 48 selfloop transitions, 7 changer transitions 14/69 dead transitions. [2023-11-17 16:01:38,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 69 transitions, 309 flow [2023-11-17 16:01:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:01:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:01:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 774 transitions. [2023-11-17 16:01:38,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861809045226131 [2023-11-17 16:01:38,325 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 774 transitions. [2023-11-17 16:01:38,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 774 transitions. [2023-11-17 16:01:38,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:38,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 774 transitions. [2023-11-17 16:01:38,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.75) internal successors, (774), 8 states have internal predecessors, (774), 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 16:01:38,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 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 16:01:38,340 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 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 16:01:38,341 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 58 flow. Second operand 8 states and 774 transitions. [2023-11-17 16:01:38,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 69 transitions, 309 flow [2023-11-17 16:01:38,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 69 transitions, 287 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:01:38,345 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 88 flow [2023-11-17 16:01:38,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=88, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-11-17 16:01:38,348 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-17 16:01:38,348 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 88 flow [2023-11-17 16:01:38,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 91.28571428571429) internal successors, (639), 7 states have internal predecessors, (639), 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 16:01:38,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:38,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:38,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:01:38,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:38,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash 16599366, now seen corresponding path program 2 times [2023-11-17 16:01:38,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:38,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948118489] [2023-11-17 16:01:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:38,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:38,479 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 16:01:38,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:38,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948118489] [2023-11-17 16:01:38,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948118489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:01:38,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:01:38,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:01:38,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679999776] [2023-11-17 16:01:38,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:01:38,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:01:38,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:01:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:01:38,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 199 [2023-11-17 16:01:38,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 91.28571428571429) internal successors, (639), 7 states have internal predecessors, (639), 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 16:01:38,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:38,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 199 [2023-11-17 16:01:38,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:38,625 INFO L124 PetriNetUnfolderBase]: 203/399 cut-off events. [2023-11-17 16:01:38,625 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-17 16:01:38,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 918 conditions, 399 events. 203/399 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1402 event pairs, 77 based on Foata normal form. 1/400 useless extension candidates. Maximal degree in co-relation 906. Up to 148 conditions per place. [2023-11-17 16:01:38,627 INFO L140 encePairwiseOnDemand]: 193/199 looper letters, 35 selfloop transitions, 6 changer transitions 26/67 dead transitions. [2023-11-17 16:01:38,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 67 transitions, 315 flow [2023-11-17 16:01:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:01:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:01:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 771 transitions. [2023-11-17 16:01:38,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4842964824120603 [2023-11-17 16:01:38,630 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 771 transitions. [2023-11-17 16:01:38,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 771 transitions. [2023-11-17 16:01:38,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:38,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 771 transitions. [2023-11-17 16:01:38,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.375) internal successors, (771), 8 states have internal predecessors, (771), 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 16:01:38,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 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 16:01:38,635 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 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 16:01:38,635 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 88 flow. Second operand 8 states and 771 transitions. [2023-11-17 16:01:38,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 67 transitions, 315 flow [2023-11-17 16:01:38,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 67 transitions, 311 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 16:01:38,637 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 87 flow [2023-11-17 16:01:38,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=87, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-11-17 16:01:38,638 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2023-11-17 16:01:38,638 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 87 flow [2023-11-17 16:01:38,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 91.28571428571429) internal successors, (639), 7 states have internal predecessors, (639), 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 16:01:38,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:38,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:38,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:01:38,639 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:38,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:38,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2011163986, now seen corresponding path program 3 times [2023-11-17 16:01:38,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:38,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111184832] [2023-11-17 16:01:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:38,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:38,782 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 16:01:38,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:38,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111184832] [2023-11-17 16:01:38,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111184832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:01:38,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:01:38,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:01:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260918197] [2023-11-17 16:01:38,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:01:38,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:01:38,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:01:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:01:38,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 199 [2023-11-17 16:01:38,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 87 flow. Second operand has 6 states, 6 states have (on average 94.16666666666667) internal successors, (565), 6 states have internal predecessors, (565), 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 16:01:38,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:38,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 199 [2023-11-17 16:01:38,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:38,853 INFO L124 PetriNetUnfolderBase]: 93/220 cut-off events. [2023-11-17 16:01:38,853 INFO L125 PetriNetUnfolderBase]: For 13/15 co-relation queries the response was YES. [2023-11-17 16:01:38,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 220 events. 93/220 cut-off events. For 13/15 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 778 event pairs, 15 based on Foata normal form. 6/224 useless extension candidates. Maximal degree in co-relation 470. Up to 108 conditions per place. [2023-11-17 16:01:38,855 INFO L140 encePairwiseOnDemand]: 194/199 looper letters, 22 selfloop transitions, 4 changer transitions 11/43 dead transitions. [2023-11-17 16:01:38,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 198 flow [2023-11-17 16:01:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:01:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:01:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 584 transitions. [2023-11-17 16:01:38,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48911222780569513 [2023-11-17 16:01:38,857 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 584 transitions. [2023-11-17 16:01:38,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 584 transitions. [2023-11-17 16:01:38,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:38,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 584 transitions. [2023-11-17 16:01:38,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.33333333333333) internal successors, (584), 6 states have internal predecessors, (584), 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 16:01:38,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 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 16:01:38,861 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 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 16:01:38,861 INFO L175 Difference]: Start difference. First operand has 41 places, 25 transitions, 87 flow. Second operand 6 states and 584 transitions. [2023-11-17 16:01:38,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 198 flow [2023-11-17 16:01:38,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 177 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-11-17 16:01:38,862 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 89 flow [2023-11-17 16:01:38,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=89, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-11-17 16:01:38,863 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-11-17 16:01:38,863 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 89 flow [2023-11-17 16:01:38,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 94.16666666666667) internal successors, (565), 6 states have internal predecessors, (565), 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 16:01:38,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:38,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:38,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:01:38,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:38,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1578670836, now seen corresponding path program 4 times [2023-11-17 16:01:38,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:38,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830315987] [2023-11-17 16:01:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:38,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:38,897 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 16:01:38,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:38,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830315987] [2023-11-17 16:01:38,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830315987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:01:38,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:01:38,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:01:38,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900513129] [2023-11-17 16:01:38,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:01:38,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:01:38,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:01:38,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:01:38,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 199 [2023-11-17 16:01:38,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 16:01:38,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:38,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 199 [2023-11-17 16:01:38,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:38,929 INFO L124 PetriNetUnfolderBase]: 66/173 cut-off events. [2023-11-17 16:01:38,929 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-17 16:01:38,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 173 events. 66/173 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 555 event pairs, 59 based on Foata normal form. 2/171 useless extension candidates. Maximal degree in co-relation 228. Up to 137 conditions per place. [2023-11-17 16:01:38,930 INFO L140 encePairwiseOnDemand]: 196/199 looper letters, 20 selfloop transitions, 3 changer transitions 1/30 dead transitions. [2023-11-17 16:01:38,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 147 flow [2023-11-17 16:01:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:01:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:01:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2023-11-17 16:01:38,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159128978224455 [2023-11-17 16:01:38,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2023-11-17 16:01:38,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2023-11-17 16:01:38,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:38,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2023-11-17 16:01:38,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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 16:01:38,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 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 16:01:38,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 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 16:01:38,933 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 89 flow. Second operand 3 states and 308 transitions. [2023-11-17 16:01:38,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 147 flow [2023-11-17 16:01:38,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 30 transitions, 142 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 16:01:38,934 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 95 flow [2023-11-17 16:01:38,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-11-17 16:01:38,935 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-11-17 16:01:38,935 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 95 flow [2023-11-17 16:01:38,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 16:01:38,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:38,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:38,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:01:38,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:38,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1858055410, now seen corresponding path program 5 times [2023-11-17 16:01:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:38,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924940567] [2023-11-17 16:01:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:38,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:38,969 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 16:01:38,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:38,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924940567] [2023-11-17 16:01:38,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924940567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:01:38,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:01:38,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:01:38,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135118959] [2023-11-17 16:01:38,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:01:38,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:01:38,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:38,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:01:38,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:01:38,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 199 [2023-11-17 16:01:38,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 16:01:38,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:38,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 199 [2023-11-17 16:01:38,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:39,001 INFO L124 PetriNetUnfolderBase]: 64/167 cut-off events. [2023-11-17 16:01:39,002 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-17 16:01:39,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 167 events. 64/167 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 537 event pairs, 45 based on Foata normal form. 2/165 useless extension candidates. Maximal degree in co-relation 117. Up to 121 conditions per place. [2023-11-17 16:01:39,002 INFO L140 encePairwiseOnDemand]: 196/199 looper letters, 24 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-11-17 16:01:39,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 172 flow [2023-11-17 16:01:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:01:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:01:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2023-11-17 16:01:39,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5209380234505863 [2023-11-17 16:01:39,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2023-11-17 16:01:39,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2023-11-17 16:01:39,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:39,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2023-11-17 16:01:39,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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 16:01:39,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 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 16:01:39,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 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 16:01:39,007 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 95 flow. Second operand 3 states and 311 transitions. [2023-11-17 16:01:39,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 172 flow [2023-11-17 16:01:39,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:01:39,008 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 100 flow [2023-11-17 16:01:39,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-11-17 16:01:39,008 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-11-17 16:01:39,009 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 100 flow [2023-11-17 16:01:39,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 16:01:39,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:39,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:39,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:01:39,009 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:39,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:39,010 INFO L85 PathProgramCache]: Analyzing trace with hash 442367836, now seen corresponding path program 6 times [2023-11-17 16:01:39,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:39,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589289409] [2023-11-17 16:01:39,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:39,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:39,127 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 16:01:39,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:39,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589289409] [2023-11-17 16:01:39,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589289409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:01:39,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:01:39,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:01:39,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610524500] [2023-11-17 16:01:39,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:01:39,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:01:39,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:39,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:01:39,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:01:39,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 199 [2023-11-17 16:01:39,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 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 16:01:39,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:39,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 199 [2023-11-17 16:01:39,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:39,185 INFO L124 PetriNetUnfolderBase]: 72/193 cut-off events. [2023-11-17 16:01:39,186 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-17 16:01:39,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 193 events. 72/193 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 672 event pairs, 29 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 120. Up to 100 conditions per place. [2023-11-17 16:01:39,187 INFO L140 encePairwiseOnDemand]: 195/199 looper letters, 19 selfloop transitions, 2 changer transitions 11/38 dead transitions. [2023-11-17 16:01:39,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 196 flow [2023-11-17 16:01:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:01:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:01:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 488 transitions. [2023-11-17 16:01:39,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904522613065327 [2023-11-17 16:01:39,189 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 488 transitions. [2023-11-17 16:01:39,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 488 transitions. [2023-11-17 16:01:39,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:39,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 488 transitions. [2023-11-17 16:01:39,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.6) internal successors, (488), 5 states have internal predecessors, (488), 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 16:01:39,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 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 16:01:39,192 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 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 16:01:39,192 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 100 flow. Second operand 5 states and 488 transitions. [2023-11-17 16:01:39,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 196 flow [2023-11-17 16:01:39,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:01:39,194 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 88 flow [2023-11-17 16:01:39,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-11-17 16:01:39,197 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2023-11-17 16:01:39,197 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 88 flow [2023-11-17 16:01:39,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 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 16:01:39,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:39,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:39,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 16:01:39,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:39,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:39,198 INFO L85 PathProgramCache]: Analyzing trace with hash -676382258, now seen corresponding path program 7 times [2023-11-17 16:01:39,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:39,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418554548] [2023-11-17 16:01:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:39,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:39,334 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 16:01:39,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:39,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418554548] [2023-11-17 16:01:39,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418554548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:01:39,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:01:39,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:01:39,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38758674] [2023-11-17 16:01:39,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:01:39,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:01:39,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:39,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:01:39,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:01:39,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 199 [2023-11-17 16:01:39,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 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 16:01:39,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:39,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 199 [2023-11-17 16:01:39,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:39,382 INFO L124 PetriNetUnfolderBase]: 59/160 cut-off events. [2023-11-17 16:01:39,382 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-17 16:01:39,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 160 events. 59/160 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 500 event pairs, 19 based on Foata normal form. 8/164 useless extension candidates. Maximal degree in co-relation 233. Up to 78 conditions per place. [2023-11-17 16:01:39,383 INFO L140 encePairwiseOnDemand]: 194/199 looper letters, 20 selfloop transitions, 4 changer transitions 5/35 dead transitions. [2023-11-17 16:01:39,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 178 flow [2023-11-17 16:01:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:01:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:01:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 485 transitions. [2023-11-17 16:01:39,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48743718592964824 [2023-11-17 16:01:39,385 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 485 transitions. [2023-11-17 16:01:39,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 485 transitions. [2023-11-17 16:01:39,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:39,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 485 transitions. [2023-11-17 16:01:39,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 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 16:01:39,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 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 16:01:39,388 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 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 16:01:39,388 INFO L175 Difference]: Start difference. First operand has 41 places, 25 transitions, 88 flow. Second operand 5 states and 485 transitions. [2023-11-17 16:01:39,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 178 flow [2023-11-17 16:01:39,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 160 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-17 16:01:39,389 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 86 flow [2023-11-17 16:01:39,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-11-17 16:01:39,390 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-11-17 16:01:39,390 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 86 flow [2023-11-17 16:01:39,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 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 16:01:39,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:39,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:39,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 16:01:39,394 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:39,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1365912046, now seen corresponding path program 8 times [2023-11-17 16:01:39,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:39,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050570310] [2023-11-17 16:01:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:39,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:39,501 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 16:01:39,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:39,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050570310] [2023-11-17 16:01:39,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050570310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:01:39,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:01:39,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:01:39,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163643448] [2023-11-17 16:01:39,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:01:39,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:01:39,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:39,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:01:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:01:39,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 199 [2023-11-17 16:01:39,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 94.16666666666667) internal successors, (565), 6 states have internal predecessors, (565), 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 16:01:39,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:39,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 199 [2023-11-17 16:01:39,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:39,534 INFO L124 PetriNetUnfolderBase]: 21/54 cut-off events. [2023-11-17 16:01:39,534 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-17 16:01:39,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 54 events. 21/54 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 116 event pairs, 1 based on Foata normal form. 6/60 useless extension candidates. Maximal degree in co-relation 59. Up to 26 conditions per place. [2023-11-17 16:01:39,535 INFO L140 encePairwiseOnDemand]: 194/199 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-11-17 16:01:39,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 18 transitions, 97 flow [2023-11-17 16:01:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:01:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:01:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 564 transitions. [2023-11-17 16:01:39,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723618090452261 [2023-11-17 16:01:39,537 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 564 transitions. [2023-11-17 16:01:39,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 564 transitions. [2023-11-17 16:01:39,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:39,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 564 transitions. [2023-11-17 16:01:39,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 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 16:01:39,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 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 16:01:39,540 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 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 16:01:39,540 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 86 flow. Second operand 6 states and 564 transitions. [2023-11-17 16:01:39,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 18 transitions, 97 flow [2023-11-17 16:01:39,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 18 transitions, 85 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-17 16:01:39,540 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2023-11-17 16:01:39,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2023-11-17 16:01:39,542 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -6 predicate places. [2023-11-17 16:01:39,542 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2023-11-17 16:01:39,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 94.16666666666667) internal successors, (565), 6 states have internal predecessors, (565), 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 16:01:39,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:01:39,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:01:39,546 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:01:39,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 16:01:39,546 INFO L445 BasicCegarLoop]: Path program histogram: [8] [2023-11-17 16:01:39,548 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:01:39,548 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:01:39,555 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:01:39 BasicIcfg [2023-11-17 16:01:39,556 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:01:39,556 INFO L158 Benchmark]: Toolchain (without parser) took 4876.45ms. Allocated memory was 348.1MB in the beginning and 434.1MB in the end (delta: 86.0MB). Free memory was 304.7MB in the beginning and 246.0MB in the end (delta: 58.7MB). Peak memory consumption was 146.3MB. Max. memory is 8.0GB. [2023-11-17 16:01:39,556 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory is still 142.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:01:39,558 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.58ms. Allocated memory is still 348.1MB. Free memory was 304.7MB in the beginning and 293.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:01:39,558 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.40ms. Allocated memory is still 348.1MB. Free memory was 293.1MB in the beginning and 291.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:01:39,559 INFO L158 Benchmark]: Boogie Preprocessor took 19.97ms. Allocated memory is still 348.1MB. Free memory was 291.0MB in the beginning and 289.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:01:39,560 INFO L158 Benchmark]: RCFGBuilder took 315.53ms. Allocated memory is still 348.1MB. Free memory was 289.5MB in the beginning and 269.5MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-11-17 16:01:39,560 INFO L158 Benchmark]: TraceAbstraction took 4300.99ms. Allocated memory was 348.1MB in the beginning and 434.1MB in the end (delta: 86.0MB). Free memory was 269.0MB in the beginning and 246.0MB in the end (delta: 23.1MB). Peak memory consumption was 110.6MB. Max. memory is 8.0GB. [2023-11-17 16:01:39,561 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory is still 142.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.58ms. Allocated memory is still 348.1MB. Free memory was 304.7MB in the beginning and 293.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.40ms. Allocated memory is still 348.1MB. Free memory was 293.1MB in the beginning and 291.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.97ms. Allocated memory is still 348.1MB. Free memory was 291.0MB in the beginning and 289.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 315.53ms. Allocated memory is still 348.1MB. Free memory was 289.5MB in the beginning and 269.5MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 4300.99ms. Allocated memory was 348.1MB in the beginning and 434.1MB in the end (delta: 86.0MB). Free memory was 269.0MB in the beginning and 246.0MB in the end (delta: 23.1MB). Peak memory consumption was 110.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 107 PlacesBefore, 30 PlacesAfterwards, 102 TransitionsBefore, 23 TransitionsAfterwards, 648 CoEnabledTransitionPairs, 7 FixpointIterations, 63 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 86 TotalNumberOfCompositions, 2880 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1442, independent: 1241, independent conditional: 0, independent unconditional: 1241, dependent: 201, dependent conditional: 0, dependent unconditional: 201, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 508, independent: 463, independent conditional: 0, independent unconditional: 463, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 508, independent: 453, independent conditional: 0, independent unconditional: 453, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 55, independent: 10, independent conditional: 0, independent unconditional: 10, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 98, independent: 15, independent conditional: 0, independent unconditional: 15, dependent: 83, dependent conditional: 0, dependent unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1442, independent: 778, independent conditional: 0, independent unconditional: 778, dependent: 156, dependent conditional: 0, dependent unconditional: 156, unknown: 508, unknown conditional: 0, unknown unconditional: 508] , Statistics on independence cache: Total cache size (in pairs): 138, Positive cache size: 115, Positive conditional cache size: 0, Positive unconditional cache size: 115, Negative cache size: 23, Negative conditional cache size: 0, Negative unconditional cache size: 23, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 130]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 140 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 140 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 140 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 946 IncrementalHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 5 mSDtfsCounter, 946 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=5, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 184 NumberOfCodeBlocks, 184 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 176 ConstructedInterpolants, 0 QuantifiedInterpolants, 564 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-17 16:01:39,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...