/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/popl20-more-buffer-mult2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:18:02,493 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:18:02,572 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 16:18:02,613 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:18:02,614 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:18:02,615 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:18:02,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:18:02,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:18:02,616 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:18:02,619 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:18:02,620 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:18:02,620 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:18:02,620 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:18:02,621 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:18:02,622 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:18:02,622 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:18:02,622 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:18:02,622 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:18:02,622 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:18:02,623 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:18:02,623 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:18:02,624 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:18:02,624 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:18:02,624 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:18:02,624 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:18:02,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:18:02,625 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:18:02,625 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:18:02,625 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:18:02,625 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:18:02,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:18:02,626 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:18:02,626 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:18:02,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:18:02,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:18:02,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:18:02,890 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:18:02,892 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:18:02,893 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-11-17 16:18:04,053 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:18:04,238 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:18:04,239 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-11-17 16:18:04,248 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c502ce085/df5418463f33480a8e2a89ae3d8df50a/FLAG25ad5e745 [2023-11-17 16:18:04,260 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c502ce085/df5418463f33480a8e2a89ae3d8df50a [2023-11-17 16:18:04,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:18:04,263 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:18:04,264 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:18:04,264 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:18:04,267 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:18:04,268 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,268 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0e4d66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04, skipping insertion in model container [2023-11-17 16:18:04,269 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,306 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:18:04,444 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/popl20-more-buffer-mult2.wvr.c[4151,4164] [2023-11-17 16:18:04,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:18:04,461 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:18:04,486 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/popl20-more-buffer-mult2.wvr.c[4151,4164] [2023-11-17 16:18:04,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:18:04,498 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:18:04,498 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:18:04,503 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:18:04,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04 WrapperNode [2023-11-17 16:18:04,504 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:18:04,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:18:04,505 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:18:04,505 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:18:04,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,518 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,550 INFO L138 Inliner]: procedures = 27, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 316 [2023-11-17 16:18:04,551 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:18:04,552 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:18:04,552 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:18:04,552 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:18:04,560 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,564 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,565 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,575 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,579 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,582 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,584 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,588 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:18:04,590 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:18:04,590 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:18:04,590 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:18:04,591 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (1/1) ... [2023-11-17 16:18:04,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:18:04,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:18:04,622 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 16:18:04,644 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 16:18:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:18:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:18:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:18:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:18:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:18:04,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:18:04,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:18:04,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:18:04,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:18:04,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:18:04,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 16:18:04,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 16:18:04,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:18:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:18:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:18:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:18:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:18:04,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:18:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:18:04,660 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 16:18:04,796 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:18:04,799 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:18:05,257 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:18:05,447 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:18:05,447 INFO L307 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-17 16:18:05,449 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:18:05 BoogieIcfgContainer [2023-11-17 16:18:05,449 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:18:05,452 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:18:05,452 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:18:05,454 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:18:05,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:18:04" (1/3) ... [2023-11-17 16:18:05,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f095c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:18:05, skipping insertion in model container [2023-11-17 16:18:05,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:04" (2/3) ... [2023-11-17 16:18:05,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f095c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:18:05, skipping insertion in model container [2023-11-17 16:18:05,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:18:05" (3/3) ... [2023-11-17 16:18:05,457 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2023-11-17 16:18:05,471 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:18:05,471 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:18:05,471 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:18:05,550 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 16:18:05,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 239 transitions, 506 flow [2023-11-17 16:18:05,732 INFO L124 PetriNetUnfolderBase]: 18/235 cut-off events. [2023-11-17 16:18:05,733 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:18:05,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 235 events. 18/235 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 123 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 195. Up to 2 conditions per place. [2023-11-17 16:18:05,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 239 transitions, 506 flow [2023-11-17 16:18:05,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 222 transitions, 468 flow [2023-11-17 16:18:05,747 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:18:05,759 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 222 transitions, 468 flow [2023-11-17 16:18:05,761 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 222 transitions, 468 flow [2023-11-17 16:18:05,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 222 transitions, 468 flow [2023-11-17 16:18:05,818 INFO L124 PetriNetUnfolderBase]: 18/222 cut-off events. [2023-11-17 16:18:05,819 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:18:05,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 222 events. 18/222 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 119 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 195. Up to 2 conditions per place. [2023-11-17 16:18:05,823 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-11-17 16:18:14,062 INFO L134 LiptonReduction]: Checked pairs total: 3398 [2023-11-17 16:18:14,063 INFO L136 LiptonReduction]: Total number of compositions: 224 [2023-11-17 16:18:14,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:18:14,081 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;@1095519a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:18:14,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 16:18:14,088 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:18:14,088 INFO L124 PetriNetUnfolderBase]: 6/34 cut-off events. [2023-11-17 16:18:14,088 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:18:14,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:14,089 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, 1, 1, 1, 1] [2023-11-17 16:18:14,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:14,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1139717756, now seen corresponding path program 1 times [2023-11-17 16:18:14,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:14,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955476051] [2023-11-17 16:18:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:14,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:14,529 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 16:18:14,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:14,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955476051] [2023-11-17 16:18:14,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955476051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:14,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:14,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:18:14,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743876052] [2023-11-17 16:18:14,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:14,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:18:14,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:14,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:18:14,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:18:14,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 463 [2023-11-17 16:18:14,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 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 16:18:14,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:14,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 463 [2023-11-17 16:18:14,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:14,946 INFO L124 PetriNetUnfolderBase]: 1994/2770 cut-off events. [2023-11-17 16:18:14,946 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2023-11-17 16:18:14,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5544 conditions, 2770 events. 1994/2770 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10611 event pairs, 624 based on Foata normal form. 1/2025 useless extension candidates. Maximal degree in co-relation 4188. Up to 1445 conditions per place. [2023-11-17 16:18:14,969 INFO L140 encePairwiseOnDemand]: 459/463 looper letters, 51 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-11-17 16:18:14,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 263 flow [2023-11-17 16:18:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:18:14,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:18:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-11-17 16:18:14,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49820014398848095 [2023-11-17 16:18:14,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-11-17 16:18:14,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-11-17 16:18:14,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:14,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-11-17 16:18:15,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 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 16:18:15,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 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 16:18:15,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 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 16:18:15,012 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 94 flow. Second operand 3 states and 692 transitions. [2023-11-17 16:18:15,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 263 flow [2023-11-17 16:18:15,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 237 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 16:18:15,020 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 97 flow [2023-11-17 16:18:15,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-17 16:18:15,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-11-17 16:18:15,025 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 97 flow [2023-11-17 16:18:15,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 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 16:18:15,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:15,026 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, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:15,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:18:15,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:15,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash -191847114, now seen corresponding path program 1 times [2023-11-17 16:18:15,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:15,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548193078] [2023-11-17 16:18:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:15,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:18:15,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:15,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548193078] [2023-11-17 16:18:15,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548193078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:15,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:15,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:18:15,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136938359] [2023-11-17 16:18:15,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:15,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:18:15,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:18:15,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:18:15,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 463 [2023-11-17 16:18:15,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 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 16:18:15,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:15,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 463 [2023-11-17 16:18:15,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:15,680 INFO L124 PetriNetUnfolderBase]: 3074/4117 cut-off events. [2023-11-17 16:18:15,681 INFO L125 PetriNetUnfolderBase]: For 581/581 co-relation queries the response was YES. [2023-11-17 16:18:15,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9061 conditions, 4117 events. 3074/4117 cut-off events. For 581/581 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16303 event pairs, 1168 based on Foata normal form. 134/3611 useless extension candidates. Maximal degree in co-relation 3820. Up to 2266 conditions per place. [2023-11-17 16:18:15,703 INFO L140 encePairwiseOnDemand]: 460/463 looper letters, 58 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-17 16:18:15,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 61 transitions, 278 flow [2023-11-17 16:18:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:18:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:18:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-11-17 16:18:15,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49100071994240463 [2023-11-17 16:18:15,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-11-17 16:18:15,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-11-17 16:18:15,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:15,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-11-17 16:18:15,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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 16:18:15,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 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 16:18:15,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 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 16:18:15,712 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 97 flow. Second operand 3 states and 682 transitions. [2023-11-17 16:18:15,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 61 transitions, 278 flow [2023-11-17 16:18:15,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 61 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:18:15,715 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 108 flow [2023-11-17 16:18:15,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-11-17 16:18:15,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-11-17 16:18:15,716 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 108 flow [2023-11-17 16:18:15,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 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 16:18:15,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:15,720 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, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:15,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:18:15,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:15,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:15,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1906027721, now seen corresponding path program 1 times [2023-11-17 16:18:15,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:15,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980362519] [2023-11-17 16:18:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:15,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:18:15,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:15,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980362519] [2023-11-17 16:18:15,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980362519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:15,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:15,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:18:15,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012978539] [2023-11-17 16:18:15,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:15,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:18:15,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:15,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:18:15,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:18:15,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 463 [2023-11-17 16:18:15,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 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 16:18:15,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:15,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 463 [2023-11-17 16:18:15,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:16,412 INFO L124 PetriNetUnfolderBase]: 4210/5763 cut-off events. [2023-11-17 16:18:16,413 INFO L125 PetriNetUnfolderBase]: For 1579/1579 co-relation queries the response was YES. [2023-11-17 16:18:16,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13138 conditions, 5763 events. 4210/5763 cut-off events. For 1579/1579 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 24536 event pairs, 1600 based on Foata normal form. 198/5519 useless extension candidates. Maximal degree in co-relation 7128. Up to 3501 conditions per place. [2023-11-17 16:18:16,438 INFO L140 encePairwiseOnDemand]: 460/463 looper letters, 62 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-17 16:18:16,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 312 flow [2023-11-17 16:18:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:18:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:18:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2023-11-17 16:18:16,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4924406047516199 [2023-11-17 16:18:16,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2023-11-17 16:18:16,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2023-11-17 16:18:16,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:16,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2023-11-17 16:18:16,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 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 16:18:16,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 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 16:18:16,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 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 16:18:16,446 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 108 flow. Second operand 3 states and 684 transitions. [2023-11-17 16:18:16,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 312 flow [2023-11-17 16:18:16,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 65 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:18:16,449 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 120 flow [2023-11-17 16:18:16,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-11-17 16:18:16,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-11-17 16:18:16,451 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 120 flow [2023-11-17 16:18:16,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 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 16:18:16,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:16,452 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:16,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:18:16,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:16,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1111712349, now seen corresponding path program 1 times [2023-11-17 16:18:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:16,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770863349] [2023-11-17 16:18:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:16,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:18:16,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:16,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770863349] [2023-11-17 16:18:16,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770863349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:16,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:16,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:18:16,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689962954] [2023-11-17 16:18:16,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:16,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:18:16,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:16,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:18:16,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:18:16,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 463 [2023-11-17 16:18:16,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 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 16:18:16,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:16,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 463 [2023-11-17 16:18:16,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:17,326 INFO L124 PetriNetUnfolderBase]: 5430/7643 cut-off events. [2023-11-17 16:18:17,326 INFO L125 PetriNetUnfolderBase]: For 2833/2833 co-relation queries the response was YES. [2023-11-17 16:18:17,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17803 conditions, 7643 events. 5430/7643 cut-off events. For 2833/2833 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 35220 event pairs, 4378 based on Foata normal form. 156/7742 useless extension candidates. Maximal degree in co-relation 11110. Up to 5248 conditions per place. [2023-11-17 16:18:17,368 INFO L140 encePairwiseOnDemand]: 457/463 looper letters, 66 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-11-17 16:18:17,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 73 transitions, 352 flow [2023-11-17 16:18:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:18:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:18:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 991 transitions. [2023-11-17 16:18:17,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42807775377969765 [2023-11-17 16:18:17,371 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 991 transitions. [2023-11-17 16:18:17,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 991 transitions. [2023-11-17 16:18:17,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:17,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 991 transitions. [2023-11-17 16:18:17,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 198.2) internal successors, (991), 5 states have internal predecessors, (991), 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 16:18:17,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 463.0) internal successors, (2778), 6 states have internal predecessors, (2778), 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 16:18:17,379 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 463.0) internal successors, (2778), 6 states have internal predecessors, (2778), 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 16:18:17,379 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 120 flow. Second operand 5 states and 991 transitions. [2023-11-17 16:18:17,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 73 transitions, 352 flow [2023-11-17 16:18:17,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 73 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:18:17,382 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 154 flow [2023-11-17 16:18:17,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-17 16:18:17,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2023-11-17 16:18:17,383 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 154 flow [2023-11-17 16:18:17,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 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 16:18:17,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:17,384 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:17,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:18:17,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:17,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:17,385 INFO L85 PathProgramCache]: Analyzing trace with hash 334222298, now seen corresponding path program 1 times [2023-11-17 16:18:17,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:17,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55244265] [2023-11-17 16:18:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:17,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:18:17,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:17,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55244265] [2023-11-17 16:18:17,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55244265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:17,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:17,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:18:17,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450579193] [2023-11-17 16:18:17,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:17,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:18:17,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:17,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:18:17,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:18:17,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 463 [2023-11-17 16:18:17,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 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 16:18:17,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:17,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 463 [2023-11-17 16:18:17,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:18,496 INFO L124 PetriNetUnfolderBase]: 7689/10994 cut-off events. [2023-11-17 16:18:18,497 INFO L125 PetriNetUnfolderBase]: For 4082/4082 co-relation queries the response was YES. [2023-11-17 16:18:18,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25128 conditions, 10994 events. 7689/10994 cut-off events. For 4082/4082 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 55345 event pairs, 6450 based on Foata normal form. 306/11245 useless extension candidates. Maximal degree in co-relation 18186. Up to 7418 conditions per place. [2023-11-17 16:18:18,540 INFO L140 encePairwiseOnDemand]: 459/463 looper letters, 65 selfloop transitions, 5 changer transitions 1/73 dead transitions. [2023-11-17 16:18:18,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 384 flow [2023-11-17 16:18:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:18:18,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:18:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 802 transitions. [2023-11-17 16:18:18,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330453563714903 [2023-11-17 16:18:18,544 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 802 transitions. [2023-11-17 16:18:18,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 802 transitions. [2023-11-17 16:18:18,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:18,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 802 transitions. [2023-11-17 16:18:18,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 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 16:18:18,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 463.0) internal successors, (2315), 5 states have internal predecessors, (2315), 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 16:18:18,550 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 463.0) internal successors, (2315), 5 states have internal predecessors, (2315), 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 16:18:18,551 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 154 flow. Second operand 4 states and 802 transitions. [2023-11-17 16:18:18,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 384 flow [2023-11-17 16:18:18,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 378 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 16:18:18,556 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 172 flow [2023-11-17 16:18:18,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-17 16:18:18,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2023-11-17 16:18:18,558 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 172 flow [2023-11-17 16:18:18,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 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 16:18:18,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:18,559 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:18,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:18:18,559 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:18,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash -502379585, now seen corresponding path program 1 times [2023-11-17 16:18:18,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:18,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066961905] [2023-11-17 16:18:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:18,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:19,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:19,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066961905] [2023-11-17 16:18:19,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066961905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:19,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:19,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:18:19,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712270977] [2023-11-17 16:18:19,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:19,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:18:19,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:19,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:18:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:18:19,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 463 [2023-11-17 16:18:19,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 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 16:18:19,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:19,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 463 [2023-11-17 16:18:19,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:20,437 INFO L124 PetriNetUnfolderBase]: 9139/12975 cut-off events. [2023-11-17 16:18:20,438 INFO L125 PetriNetUnfolderBase]: For 4138/4138 co-relation queries the response was YES. [2023-11-17 16:18:20,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30119 conditions, 12975 events. 9139/12975 cut-off events. For 4138/4138 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 68926 event pairs, 1574 based on Foata normal form. 248/13221 useless extension candidates. Maximal degree in co-relation 22777. Up to 8084 conditions per place. [2023-11-17 16:18:20,501 INFO L140 encePairwiseOnDemand]: 457/463 looper letters, 100 selfloop transitions, 7 changer transitions 27/134 dead transitions. [2023-11-17 16:18:20,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 134 transitions, 671 flow [2023-11-17 16:18:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:18:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:18:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1505 transitions. [2023-11-17 16:18:20,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46436285097192226 [2023-11-17 16:18:20,506 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1505 transitions. [2023-11-17 16:18:20,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1505 transitions. [2023-11-17 16:18:20,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:20,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1505 transitions. [2023-11-17 16:18:20,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 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 16:18:20,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 463.0) internal successors, (3704), 8 states have internal predecessors, (3704), 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 16:18:20,516 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 463.0) internal successors, (3704), 8 states have internal predecessors, (3704), 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 16:18:20,516 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 172 flow. Second operand 7 states and 1505 transitions. [2023-11-17 16:18:20,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 134 transitions, 671 flow [2023-11-17 16:18:20,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 134 transitions, 661 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 16:18:20,521 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 226 flow [2023-11-17 16:18:20,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=226, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2023-11-17 16:18:20,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2023-11-17 16:18:20,524 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 226 flow [2023-11-17 16:18:20,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 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 16:18:20,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:20,525 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:20,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 16:18:20,526 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:20,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:20,526 INFO L85 PathProgramCache]: Analyzing trace with hash -936823099, now seen corresponding path program 2 times [2023-11-17 16:18:20,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:20,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101328038] [2023-11-17 16:18:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:20,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:21,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:21,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101328038] [2023-11-17 16:18:21,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101328038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:21,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:21,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:18:21,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520942759] [2023-11-17 16:18:21,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:21,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:18:21,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:21,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:18:21,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:18:21,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 463 [2023-11-17 16:18:21,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 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 16:18:21,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:21,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 463 [2023-11-17 16:18:21,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:22,658 INFO L124 PetriNetUnfolderBase]: 10145/14328 cut-off events. [2023-11-17 16:18:22,659 INFO L125 PetriNetUnfolderBase]: For 11027/11027 co-relation queries the response was YES. [2023-11-17 16:18:22,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37763 conditions, 14328 events. 10145/14328 cut-off events. For 11027/11027 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 76073 event pairs, 2354 based on Foata normal form. 82/14408 useless extension candidates. Maximal degree in co-relation 32446. Up to 9418 conditions per place. [2023-11-17 16:18:22,731 INFO L140 encePairwiseOnDemand]: 455/463 looper letters, 117 selfloop transitions, 18 changer transitions 16/151 dead transitions. [2023-11-17 16:18:22,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 151 transitions, 850 flow [2023-11-17 16:18:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:18:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:18:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1715 transitions. [2023-11-17 16:18:22,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46301295896328293 [2023-11-17 16:18:22,737 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1715 transitions. [2023-11-17 16:18:22,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1715 transitions. [2023-11-17 16:18:22,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:22,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1715 transitions. [2023-11-17 16:18:22,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 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 16:18:22,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 463.0) internal successors, (4167), 9 states have internal predecessors, (4167), 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 16:18:22,748 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 463.0) internal successors, (4167), 9 states have internal predecessors, (4167), 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 16:18:22,748 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 226 flow. Second operand 8 states and 1715 transitions. [2023-11-17 16:18:22,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 151 transitions, 850 flow [2023-11-17 16:18:22,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 151 transitions, 842 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-17 16:18:22,787 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 369 flow [2023-11-17 16:18:22,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=369, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-11-17 16:18:22,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2023-11-17 16:18:22,789 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 369 flow [2023-11-17 16:18:22,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 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 16:18:22,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:22,790 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:22,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 16:18:22,790 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:22,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1373414055, now seen corresponding path program 1 times [2023-11-17 16:18:22,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:22,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136961109] [2023-11-17 16:18:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:22,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:23,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:23,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136961109] [2023-11-17 16:18:23,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136961109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:18:23,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899942105] [2023-11-17 16:18:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:23,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:18:23,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:18:23,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:18:23,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 16:18:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:23,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:18:23,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:18:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:23,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:18:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:23,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899942105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:18:23,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:18:23,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-17 16:18:23,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593715197] [2023-11-17 16:18:23,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:18:23,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:18:23,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:18:23,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:18:23,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 463 [2023-11-17 16:18:23,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 369 flow. Second operand has 16 states, 16 states have (on average 201.4375) internal successors, (3223), 16 states have internal predecessors, (3223), 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 16:18:23,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:23,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 463 [2023-11-17 16:18:23,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:26,470 INFO L124 PetriNetUnfolderBase]: 13768/19329 cut-off events. [2023-11-17 16:18:26,471 INFO L125 PetriNetUnfolderBase]: For 24775/24775 co-relation queries the response was YES. [2023-11-17 16:18:26,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60445 conditions, 19329 events. 13768/19329 cut-off events. For 24775/24775 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 106482 event pairs, 1055 based on Foata normal form. 272/19599 useless extension candidates. Maximal degree in co-relation 48838. Up to 6068 conditions per place. [2023-11-17 16:18:26,700 INFO L140 encePairwiseOnDemand]: 456/463 looper letters, 192 selfloop transitions, 26 changer transitions 5/223 dead transitions. [2023-11-17 16:18:26,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 223 transitions, 1399 flow [2023-11-17 16:18:26,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:18:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:18:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2162 transitions. [2023-11-17 16:18:26,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46695464362850975 [2023-11-17 16:18:26,708 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2162 transitions. [2023-11-17 16:18:26,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2162 transitions. [2023-11-17 16:18:26,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:26,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2162 transitions. [2023-11-17 16:18:26,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 216.2) internal successors, (2162), 10 states have internal predecessors, (2162), 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 16:18:26,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 463.0) internal successors, (5093), 11 states have internal predecessors, (5093), 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 16:18:26,720 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 463.0) internal successors, (5093), 11 states have internal predecessors, (5093), 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 16:18:26,720 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 369 flow. Second operand 10 states and 2162 transitions. [2023-11-17 16:18:26,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 223 transitions, 1399 flow [2023-11-17 16:18:26,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 223 transitions, 1368 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-11-17 16:18:26,932 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 503 flow [2023-11-17 16:18:26,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=503, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2023-11-17 16:18:26,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2023-11-17 16:18:26,934 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 503 flow [2023-11-17 16:18:26,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 201.4375) internal successors, (3223), 16 states have internal predecessors, (3223), 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 16:18:26,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:26,937 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:26,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:18:27,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:18:27,144 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:27,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:27,144 INFO L85 PathProgramCache]: Analyzing trace with hash -964313393, now seen corresponding path program 2 times [2023-11-17 16:18:27,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:27,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073044338] [2023-11-17 16:18:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:27,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:27,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:27,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073044338] [2023-11-17 16:18:27,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073044338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:27,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:27,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:18:27,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203957543] [2023-11-17 16:18:27,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:27,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:18:27,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:27,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:18:27,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:18:27,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 463 [2023-11-17 16:18:27,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 503 flow. Second operand has 7 states, 7 states have (on average 201.42857142857142) internal successors, (1410), 7 states have internal predecessors, (1410), 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 16:18:27,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:27,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 463 [2023-11-17 16:18:27,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:29,695 INFO L124 PetriNetUnfolderBase]: 14572/20728 cut-off events. [2023-11-17 16:18:29,695 INFO L125 PetriNetUnfolderBase]: For 41718/41718 co-relation queries the response was YES. [2023-11-17 16:18:29,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71577 conditions, 20728 events. 14572/20728 cut-off events. For 41718/41718 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 117193 event pairs, 3590 based on Foata normal form. 152/20878 useless extension candidates. Maximal degree in co-relation 58240. Up to 16140 conditions per place. [2023-11-17 16:18:29,847 INFO L140 encePairwiseOnDemand]: 457/463 looper letters, 112 selfloop transitions, 14 changer transitions 30/156 dead transitions. [2023-11-17 16:18:29,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 156 transitions, 1070 flow [2023-11-17 16:18:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:18:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:18:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1505 transitions. [2023-11-17 16:18:29,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46436285097192226 [2023-11-17 16:18:29,851 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1505 transitions. [2023-11-17 16:18:29,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1505 transitions. [2023-11-17 16:18:29,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:29,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1505 transitions. [2023-11-17 16:18:29,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 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 16:18:29,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 463.0) internal successors, (3704), 8 states have internal predecessors, (3704), 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 16:18:29,861 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 463.0) internal successors, (3704), 8 states have internal predecessors, (3704), 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 16:18:29,861 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 503 flow. Second operand 7 states and 1505 transitions. [2023-11-17 16:18:29,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 156 transitions, 1070 flow [2023-11-17 16:18:30,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 156 transitions, 994 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-11-17 16:18:30,350 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 469 flow [2023-11-17 16:18:30,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2023-11-17 16:18:30,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2023-11-17 16:18:30,351 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 469 flow [2023-11-17 16:18:30,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.42857142857142) internal successors, (1410), 7 states have internal predecessors, (1410), 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 16:18:30,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:30,352 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:30,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 16:18:30,352 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:30,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:30,353 INFO L85 PathProgramCache]: Analyzing trace with hash -557463345, now seen corresponding path program 3 times [2023-11-17 16:18:30,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:30,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286836334] [2023-11-17 16:18:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:30,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:30,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:30,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286836334] [2023-11-17 16:18:30,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286836334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:18:30,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252225128] [2023-11-17 16:18:30,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:18:30,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:18:30,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:18:30,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:18:30,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 16:18:30,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:18:30,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:18:30,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:18:30,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:18:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:31,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:18:31,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252225128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:31,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:18:31,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2023-11-17 16:18:31,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351920973] [2023-11-17 16:18:31,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:31,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:18:31,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:18:31,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:18:31,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 463 [2023-11-17 16:18:31,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 469 flow. Second operand has 7 states, 7 states have (on average 199.42857142857142) internal successors, (1396), 7 states have internal predecessors, (1396), 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 16:18:31,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:31,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 463 [2023-11-17 16:18:31,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:32,966 INFO L124 PetriNetUnfolderBase]: 15154/21679 cut-off events. [2023-11-17 16:18:32,966 INFO L125 PetriNetUnfolderBase]: For 42109/42109 co-relation queries the response was YES. [2023-11-17 16:18:33,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74475 conditions, 21679 events. 15154/21679 cut-off events. For 42109/42109 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 125497 event pairs, 3431 based on Foata normal form. 164/21841 useless extension candidates. Maximal degree in co-relation 67536. Up to 15928 conditions per place. [2023-11-17 16:18:33,111 INFO L140 encePairwiseOnDemand]: 455/463 looper letters, 127 selfloop transitions, 24 changer transitions 42/193 dead transitions. [2023-11-17 16:18:33,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 193 transitions, 1393 flow [2023-11-17 16:18:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:18:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:18:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1903 transitions. [2023-11-17 16:18:33,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45668346532277415 [2023-11-17 16:18:33,117 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1903 transitions. [2023-11-17 16:18:33,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1903 transitions. [2023-11-17 16:18:33,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:33,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1903 transitions. [2023-11-17 16:18:33,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.44444444444446) internal successors, (1903), 9 states have internal predecessors, (1903), 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 16:18:33,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 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 16:18:33,128 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 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 16:18:33,128 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 469 flow. Second operand 9 states and 1903 transitions. [2023-11-17 16:18:33,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 193 transitions, 1393 flow [2023-11-17 16:18:33,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 193 transitions, 1321 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:18:33,400 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 625 flow [2023-11-17 16:18:33,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=625, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2023-11-17 16:18:33,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2023-11-17 16:18:33,402 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 625 flow [2023-11-17 16:18:33,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 199.42857142857142) internal successors, (1396), 7 states have internal predecessors, (1396), 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 16:18:33,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:33,402 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:33,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 16:18:33,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-17 16:18:33,609 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:33,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:33,609 INFO L85 PathProgramCache]: Analyzing trace with hash 582665875, now seen corresponding path program 4 times [2023-11-17 16:18:33,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:33,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548399823] [2023-11-17 16:18:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:33,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:34,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:34,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548399823] [2023-11-17 16:18:34,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548399823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:18:34,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122896767] [2023-11-17 16:18:34,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:18:34,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:18:34,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:18:34,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:18:34,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 16:18:34,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:18:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:18:34,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 16:18:34,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:18:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:34,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:18:34,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122896767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:34,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:18:34,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-17 16:18:34,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454650274] [2023-11-17 16:18:34,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:34,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:18:34,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:34,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:18:34,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:18:34,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 463 [2023-11-17 16:18:34,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 625 flow. Second operand has 7 states, 7 states have (on average 195.42857142857142) internal successors, (1368), 7 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:18:34,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:34,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 463 [2023-11-17 16:18:34,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:37,144 INFO L124 PetriNetUnfolderBase]: 17415/25320 cut-off events. [2023-11-17 16:18:37,145 INFO L125 PetriNetUnfolderBase]: For 64858/64858 co-relation queries the response was YES. [2023-11-17 16:18:37,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95030 conditions, 25320 events. 17415/25320 cut-off events. For 64858/64858 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 155299 event pairs, 5627 based on Foata normal form. 220/25538 useless extension candidates. Maximal degree in co-relation 87258. Up to 17494 conditions per place. [2023-11-17 16:18:37,272 INFO L140 encePairwiseOnDemand]: 454/463 looper letters, 113 selfloop transitions, 55 changer transitions 106/274 dead transitions. [2023-11-17 16:18:37,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 274 transitions, 2450 flow [2023-11-17 16:18:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:18:37,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:18:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2278 transitions. [2023-11-17 16:18:37,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44728058118986846 [2023-11-17 16:18:37,279 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2278 transitions. [2023-11-17 16:18:37,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2278 transitions. [2023-11-17 16:18:37,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:37,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2278 transitions. [2023-11-17 16:18:37,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 207.0909090909091) internal successors, (2278), 11 states have internal predecessors, (2278), 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 16:18:37,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 463.0) internal successors, (5556), 12 states have internal predecessors, (5556), 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 16:18:37,292 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 463.0) internal successors, (5556), 12 states have internal predecessors, (5556), 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 16:18:37,292 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 625 flow. Second operand 11 states and 2278 transitions. [2023-11-17 16:18:37,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 274 transitions, 2450 flow [2023-11-17 16:18:37,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 274 transitions, 2260 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-11-17 16:18:37,708 INFO L231 Difference]: Finished difference. Result has 104 places, 121 transitions, 1152 flow [2023-11-17 16:18:37,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1152, PETRI_PLACES=104, PETRI_TRANSITIONS=121} [2023-11-17 16:18:37,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2023-11-17 16:18:37,708 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 121 transitions, 1152 flow [2023-11-17 16:18:37,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.42857142857142) internal successors, (1368), 7 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:18:37,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:37,709 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:37,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:18:37,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:18:37,910 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:37,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash -390750595, now seen corresponding path program 5 times [2023-11-17 16:18:37,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:37,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573942922] [2023-11-17 16:18:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:38,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:38,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573942922] [2023-11-17 16:18:38,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573942922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:38,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:38,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:18:38,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020473616] [2023-11-17 16:18:38,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:38,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:18:38,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:38,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:18:38,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:18:38,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 463 [2023-11-17 16:18:38,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 121 transitions, 1152 flow. Second operand has 7 states, 7 states have (on average 201.42857142857142) internal successors, (1410), 7 states have internal predecessors, (1410), 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 16:18:38,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:38,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 463 [2023-11-17 16:18:38,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:41,141 INFO L124 PetriNetUnfolderBase]: 17406/25246 cut-off events. [2023-11-17 16:18:41,141 INFO L125 PetriNetUnfolderBase]: For 86831/86831 co-relation queries the response was YES. [2023-11-17 16:18:41,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106298 conditions, 25246 events. 17406/25246 cut-off events. For 86831/86831 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 154098 event pairs, 5377 based on Foata normal form. 276/25520 useless extension candidates. Maximal degree in co-relation 101576. Up to 18614 conditions per place. [2023-11-17 16:18:41,266 INFO L140 encePairwiseOnDemand]: 456/463 looper letters, 106 selfloop transitions, 65 changer transitions 39/210 dead transitions. [2023-11-17 16:18:41,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 210 transitions, 2155 flow [2023-11-17 16:18:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:18:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:18:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1288 transitions. [2023-11-17 16:18:41,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636429085673146 [2023-11-17 16:18:41,270 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1288 transitions. [2023-11-17 16:18:41,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1288 transitions. [2023-11-17 16:18:41,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:41,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1288 transitions. [2023-11-17 16:18:41,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.66666666666666) internal successors, (1288), 6 states have internal predecessors, (1288), 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 16:18:41,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 463.0) internal successors, (3241), 7 states have internal predecessors, (3241), 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 16:18:41,277 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 463.0) internal successors, (3241), 7 states have internal predecessors, (3241), 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 16:18:41,278 INFO L175 Difference]: Start difference. First operand has 104 places, 121 transitions, 1152 flow. Second operand 6 states and 1288 transitions. [2023-11-17 16:18:41,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 210 transitions, 2155 flow [2023-11-17 16:18:41,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 210 transitions, 2086 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-17 16:18:41,729 INFO L231 Difference]: Finished difference. Result has 102 places, 137 transitions, 1498 flow [2023-11-17 16:18:41,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1498, PETRI_PLACES=102, PETRI_TRANSITIONS=137} [2023-11-17 16:18:41,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2023-11-17 16:18:41,730 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 137 transitions, 1498 flow [2023-11-17 16:18:41,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.42857142857142) internal successors, (1410), 7 states have internal predecessors, (1410), 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 16:18:41,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:41,731 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:41,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 16:18:41,731 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:41,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:41,731 INFO L85 PathProgramCache]: Analyzing trace with hash -292938023, now seen corresponding path program 6 times [2023-11-17 16:18:41,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:41,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905661582] [2023-11-17 16:18:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:41,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:18:42,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:42,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905661582] [2023-11-17 16:18:42,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905661582] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:18:42,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474636044] [2023-11-17 16:18:42,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:18:42,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:18:42,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:18:42,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:18:42,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 16:18:42,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:18:42,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:18:42,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:18:42,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:18:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:42,421 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:18:42,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474636044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:42,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:18:42,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-11-17 16:18:42,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49183802] [2023-11-17 16:18:42,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:42,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:18:42,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:42,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:18:42,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:18:42,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 463 [2023-11-17 16:18:42,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 137 transitions, 1498 flow. Second operand has 8 states, 8 states have (on average 198.875) internal successors, (1591), 8 states have internal predecessors, (1591), 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 16:18:42,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:42,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 463 [2023-11-17 16:18:42,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:45,148 INFO L124 PetriNetUnfolderBase]: 17207/24960 cut-off events. [2023-11-17 16:18:45,149 INFO L125 PetriNetUnfolderBase]: For 89788/89788 co-relation queries the response was YES. [2023-11-17 16:18:45,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105485 conditions, 24960 events. 17207/24960 cut-off events. For 89788/89788 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 149647 event pairs, 6983 based on Foata normal form. 180/25138 useless extension candidates. Maximal degree in co-relation 96588. Up to 18534 conditions per place. [2023-11-17 16:18:45,272 INFO L140 encePairwiseOnDemand]: 455/463 looper letters, 118 selfloop transitions, 94 changer transitions 42/254 dead transitions. [2023-11-17 16:18:45,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 254 transitions, 2899 flow [2023-11-17 16:18:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:18:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:18:45,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1691 transitions. [2023-11-17 16:18:45,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45653347732181426 [2023-11-17 16:18:45,277 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1691 transitions. [2023-11-17 16:18:45,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1691 transitions. [2023-11-17 16:18:45,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:45,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1691 transitions. [2023-11-17 16:18:45,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 211.375) internal successors, (1691), 8 states have internal predecessors, (1691), 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 16:18:45,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 463.0) internal successors, (4167), 9 states have internal predecessors, (4167), 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 16:18:45,286 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 463.0) internal successors, (4167), 9 states have internal predecessors, (4167), 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 16:18:45,286 INFO L175 Difference]: Start difference. First operand has 102 places, 137 transitions, 1498 flow. Second operand 8 states and 1691 transitions. [2023-11-17 16:18:45,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 254 transitions, 2899 flow [2023-11-17 16:18:45,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 254 transitions, 2791 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 16:18:45,702 INFO L231 Difference]: Finished difference. Result has 111 places, 163 transitions, 2102 flow [2023-11-17 16:18:45,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2102, PETRI_PLACES=111, PETRI_TRANSITIONS=163} [2023-11-17 16:18:45,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2023-11-17 16:18:45,703 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 163 transitions, 2102 flow [2023-11-17 16:18:45,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 198.875) internal successors, (1591), 8 states have internal predecessors, (1591), 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 16:18:45,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:45,704 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:45,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 16:18:45,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:18:45,913 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:45,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:45,914 INFO L85 PathProgramCache]: Analyzing trace with hash 658318999, now seen corresponding path program 7 times [2023-11-17 16:18:45,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:45,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248119329] [2023-11-17 16:18:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:45,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:46,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:46,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248119329] [2023-11-17 16:18:46,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248119329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:46,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:46,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:18:46,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143258789] [2023-11-17 16:18:46,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:46,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:18:46,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:46,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:18:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:18:46,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 463 [2023-11-17 16:18:46,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 163 transitions, 2102 flow. Second operand has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 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 16:18:46,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:46,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 463 [2023-11-17 16:18:46,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:49,188 INFO L124 PetriNetUnfolderBase]: 17947/25689 cut-off events. [2023-11-17 16:18:49,188 INFO L125 PetriNetUnfolderBase]: For 115978/115978 co-relation queries the response was YES. [2023-11-17 16:18:49,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113020 conditions, 25689 events. 17947/25689 cut-off events. For 115978/115978 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 150673 event pairs, 6454 based on Foata normal form. 480/26167 useless extension candidates. Maximal degree in co-relation 107604. Up to 15948 conditions per place. [2023-11-17 16:18:49,327 INFO L140 encePairwiseOnDemand]: 456/463 looper letters, 140 selfloop transitions, 75 changer transitions 49/264 dead transitions. [2023-11-17 16:18:49,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 264 transitions, 2907 flow [2023-11-17 16:18:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:18:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:18:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1922 transitions. [2023-11-17 16:18:49,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124310055195583 [2023-11-17 16:18:49,331 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1922 transitions. [2023-11-17 16:18:49,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1922 transitions. [2023-11-17 16:18:49,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:49,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1922 transitions. [2023-11-17 16:18:49,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 213.55555555555554) internal successors, (1922), 9 states have internal predecessors, (1922), 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 16:18:49,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 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 16:18:49,341 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 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 16:18:49,341 INFO L175 Difference]: Start difference. First operand has 111 places, 163 transitions, 2102 flow. Second operand 9 states and 1922 transitions. [2023-11-17 16:18:49,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 264 transitions, 2907 flow [2023-11-17 16:18:49,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 264 transitions, 2827 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-17 16:18:49,774 INFO L231 Difference]: Finished difference. Result has 114 places, 142 transitions, 1821 flow [2023-11-17 16:18:49,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1821, PETRI_PLACES=114, PETRI_TRANSITIONS=142} [2023-11-17 16:18:49,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2023-11-17 16:18:49,775 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 142 transitions, 1821 flow [2023-11-17 16:18:49,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 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 16:18:49,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:49,776 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:49,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 16:18:49,776 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:49,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:49,776 INFO L85 PathProgramCache]: Analyzing trace with hash 274955889, now seen corresponding path program 8 times [2023-11-17 16:18:49,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:49,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218327454] [2023-11-17 16:18:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:49,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:18:50,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218327454] [2023-11-17 16:18:50,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218327454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:18:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790910604] [2023-11-17 16:18:50,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:18:50,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:18:50,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:18:50,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:18:50,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 16:18:50,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:18:50,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:18:50,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 16:18:50,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:18:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:18:50,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:18:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:18:50,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790910604] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:18:50,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:18:50,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 8] total 20 [2023-11-17 16:18:50,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999622930] [2023-11-17 16:18:50,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:18:50,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:18:50,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:18:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:18:50,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 463 [2023-11-17 16:18:50,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 142 transitions, 1821 flow. Second operand has 21 states, 21 states have (on average 188.66666666666666) internal successors, (3962), 21 states have internal predecessors, (3962), 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 16:18:50,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:50,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 463 [2023-11-17 16:18:50,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:57,887 INFO L124 PetriNetUnfolderBase]: 26728/38325 cut-off events. [2023-11-17 16:18:57,888 INFO L125 PetriNetUnfolderBase]: For 189014/189014 co-relation queries the response was YES. [2023-11-17 16:18:58,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168712 conditions, 38325 events. 26728/38325 cut-off events. For 189014/189014 co-relation queries the response was YES. Maximal size of possible extension queue 1358. Compared 244500 event pairs, 2421 based on Foata normal form. 2548/40871 useless extension candidates. Maximal degree in co-relation 157903. Up to 10569 conditions per place. [2023-11-17 16:18:58,271 INFO L140 encePairwiseOnDemand]: 448/463 looper letters, 423 selfloop transitions, 325 changer transitions 21/769 dead transitions. [2023-11-17 16:18:58,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 769 transitions, 7330 flow [2023-11-17 16:18:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-17 16:18:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-17 16:18:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 8521 transitions. [2023-11-17 16:18:58,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42799738811592747 [2023-11-17 16:18:58,291 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 8521 transitions. [2023-11-17 16:18:58,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 8521 transitions. [2023-11-17 16:18:58,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:58,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 8521 transitions. [2023-11-17 16:18:58,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 198.1627906976744) internal successors, (8521), 43 states have internal predecessors, (8521), 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 16:18:58,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 463.0) internal successors, (20372), 44 states have internal predecessors, (20372), 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 16:18:58,328 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 463.0) internal successors, (20372), 44 states have internal predecessors, (20372), 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 16:18:58,328 INFO L175 Difference]: Start difference. First operand has 114 places, 142 transitions, 1821 flow. Second operand 43 states and 8521 transitions. [2023-11-17 16:18:58,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 769 transitions, 7330 flow [2023-11-17 16:18:59,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 769 transitions, 7051 flow, removed 67 selfloop flow, removed 8 redundant places. [2023-11-17 16:18:59,348 INFO L231 Difference]: Finished difference. Result has 169 places, 404 transitions, 5091 flow [2023-11-17 16:18:59,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=5091, PETRI_PLACES=169, PETRI_TRANSITIONS=404} [2023-11-17 16:18:59,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2023-11-17 16:18:59,349 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 404 transitions, 5091 flow [2023-11-17 16:18:59,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 188.66666666666666) internal successors, (3962), 21 states have internal predecessors, (3962), 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 16:18:59,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:59,350 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:59,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 16:18:59,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 16:18:59,556 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:59,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:59,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1674828853, now seen corresponding path program 9 times [2023-11-17 16:18:59,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:59,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357748463] [2023-11-17 16:18:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:59,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:59,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:59,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357748463] [2023-11-17 16:18:59,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357748463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:59,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:59,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:18:59,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868807075] [2023-11-17 16:18:59,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:59,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:18:59,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:59,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:18:59,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:18:59,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 463 [2023-11-17 16:18:59,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 404 transitions, 5091 flow. Second operand has 7 states, 7 states have (on average 201.42857142857142) internal successors, (1410), 7 states have internal predecessors, (1410), 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 16:18:59,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:59,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 463 [2023-11-17 16:18:59,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:05,246 INFO L124 PetriNetUnfolderBase]: 24456/34813 cut-off events. [2023-11-17 16:19:05,246 INFO L125 PetriNetUnfolderBase]: For 854999/854999 co-relation queries the response was YES. [2023-11-17 16:19:05,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240310 conditions, 34813 events. 24456/34813 cut-off events. For 854999/854999 co-relation queries the response was YES. Maximal size of possible extension queue 1229. Compared 210592 event pairs, 9322 based on Foata normal form. 568/35379 useless extension candidates. Maximal degree in co-relation 226108. Up to 31761 conditions per place. [2023-11-17 16:19:05,570 INFO L140 encePairwiseOnDemand]: 457/463 looper letters, 349 selfloop transitions, 120 changer transitions 1/470 dead transitions. [2023-11-17 16:19:05,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 470 transitions, 6646 flow [2023-11-17 16:19:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:19:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:19:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1270 transitions. [2023-11-17 16:19:05,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45716342692584594 [2023-11-17 16:19:05,572 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1270 transitions. [2023-11-17 16:19:05,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1270 transitions. [2023-11-17 16:19:05,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:05,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1270 transitions. [2023-11-17 16:19:05,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.66666666666666) internal successors, (1270), 6 states have internal predecessors, (1270), 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 16:19:05,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 463.0) internal successors, (3241), 7 states have internal predecessors, (3241), 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 16:19:05,577 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 463.0) internal successors, (3241), 7 states have internal predecessors, (3241), 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 16:19:05,577 INFO L175 Difference]: Start difference. First operand has 169 places, 404 transitions, 5091 flow. Second operand 6 states and 1270 transitions. [2023-11-17 16:19:05,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 470 transitions, 6646 flow [2023-11-17 16:19:12,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 470 transitions, 5887 flow, removed 306 selfloop flow, removed 4 redundant places. [2023-11-17 16:19:12,440 INFO L231 Difference]: Finished difference. Result has 170 places, 402 transitions, 4681 flow [2023-11-17 16:19:12,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=4411, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4681, PETRI_PLACES=170, PETRI_TRANSITIONS=402} [2023-11-17 16:19:12,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2023-11-17 16:19:12,440 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 402 transitions, 4681 flow [2023-11-17 16:19:12,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.42857142857142) internal successors, (1410), 7 states have internal predecessors, (1410), 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 16:19:12,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:12,441 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:12,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 16:19:12,441 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:12,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1637784847, now seen corresponding path program 3 times [2023-11-17 16:19:12,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:12,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434697093] [2023-11-17 16:19:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:19:12,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:12,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434697093] [2023-11-17 16:19:12,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434697093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:12,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:19:12,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:19:12,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432536703] [2023-11-17 16:19:12,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:12,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:19:12,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:19:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:19:12,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 463 [2023-11-17 16:19:12,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 402 transitions, 4681 flow. Second operand has 7 states, 7 states have (on average 197.42857142857142) internal successors, (1382), 7 states have internal predecessors, (1382), 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 16:19:12,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:12,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 463 [2023-11-17 16:19:12,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:17,516 INFO L124 PetriNetUnfolderBase]: 22359/31839 cut-off events. [2023-11-17 16:19:17,516 INFO L125 PetriNetUnfolderBase]: For 784449/784449 co-relation queries the response was YES. [2023-11-17 16:19:17,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210851 conditions, 31839 events. 22359/31839 cut-off events. For 784449/784449 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 190743 event pairs, 9330 based on Foata normal form. 510/32347 useless extension candidates. Maximal degree in co-relation 198207. Up to 28145 conditions per place. [2023-11-17 16:19:17,845 INFO L140 encePairwiseOnDemand]: 457/463 looper letters, 367 selfloop transitions, 100 changer transitions 49/516 dead transitions. [2023-11-17 16:19:17,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 516 transitions, 7020 flow [2023-11-17 16:19:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:19:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:19:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1854 transitions. [2023-11-17 16:19:17,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4449244060475162 [2023-11-17 16:19:17,849 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1854 transitions. [2023-11-17 16:19:17,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1854 transitions. [2023-11-17 16:19:17,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:17,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1854 transitions. [2023-11-17 16:19:17,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 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 16:19:17,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 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 16:19:17,854 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 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 16:19:17,854 INFO L175 Difference]: Start difference. First operand has 170 places, 402 transitions, 4681 flow. Second operand 9 states and 1854 transitions. [2023-11-17 16:19:17,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 516 transitions, 7020 flow [2023-11-17 16:19:21,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 516 transitions, 6530 flow, removed 128 selfloop flow, removed 5 redundant places. [2023-11-17 16:19:21,362 INFO L231 Difference]: Finished difference. Result has 175 places, 402 transitions, 4534 flow [2023-11-17 16:19:21,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=4245, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4534, PETRI_PLACES=175, PETRI_TRANSITIONS=402} [2023-11-17 16:19:21,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2023-11-17 16:19:21,363 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 402 transitions, 4534 flow [2023-11-17 16:19:21,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 197.42857142857142) internal successors, (1382), 7 states have internal predecessors, (1382), 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 16:19:21,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:21,363 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:21,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 16:19:21,364 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:21,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:21,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1325171437, now seen corresponding path program 4 times [2023-11-17 16:19:21,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:21,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587717640] [2023-11-17 16:19:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:21,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:19:21,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:21,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587717640] [2023-11-17 16:19:21,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587717640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:19:21,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243888969] [2023-11-17 16:19:21,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:19:21,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:19:21,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:19:21,660 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:19:21,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 16:19:21,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:19:21,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:19:21,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 16:19:21,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:19:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:19:22,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:19:22,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243888969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:22,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:19:22,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-11-17 16:19:22,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210190652] [2023-11-17 16:19:22,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:22,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:19:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:22,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:19:22,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:19:22,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 463 [2023-11-17 16:19:22,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 402 transitions, 4534 flow. Second operand has 8 states, 8 states have (on average 194.875) internal successors, (1559), 8 states have internal predecessors, (1559), 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 16:19:22,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:22,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 463 [2023-11-17 16:19:22,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:27,207 INFO L124 PetriNetUnfolderBase]: 22759/32499 cut-off events. [2023-11-17 16:19:27,207 INFO L125 PetriNetUnfolderBase]: For 807737/807737 co-relation queries the response was YES. [2023-11-17 16:19:27,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216035 conditions, 32499 events. 22759/32499 cut-off events. For 807737/807737 co-relation queries the response was YES. Maximal size of possible extension queue 1224. Compared 198903 event pairs, 7230 based on Foata normal form. 420/32917 useless extension candidates. Maximal degree in co-relation 199417. Up to 23141 conditions per place. [2023-11-17 16:19:27,503 INFO L140 encePairwiseOnDemand]: 452/463 looper letters, 417 selfloop transitions, 116 changer transitions 13/546 dead transitions. [2023-11-17 16:19:27,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 546 transitions, 6811 flow [2023-11-17 16:19:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:19:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:19:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2064 transitions. [2023-11-17 16:19:27,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44578833693304537 [2023-11-17 16:19:27,506 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2064 transitions. [2023-11-17 16:19:27,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2064 transitions. [2023-11-17 16:19:27,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:27,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2064 transitions. [2023-11-17 16:19:27,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 206.4) internal successors, (2064), 10 states have internal predecessors, (2064), 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 16:19:27,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 463.0) internal successors, (5093), 11 states have internal predecessors, (5093), 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 16:19:27,512 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 463.0) internal successors, (5093), 11 states have internal predecessors, (5093), 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 16:19:27,512 INFO L175 Difference]: Start difference. First operand has 175 places, 402 transitions, 4534 flow. Second operand 10 states and 2064 transitions. [2023-11-17 16:19:27,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 546 transitions, 6811 flow [2023-11-17 16:19:31,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 546 transitions, 6668 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-11-17 16:19:31,615 INFO L231 Difference]: Finished difference. Result has 185 places, 425 transitions, 4961 flow [2023-11-17 16:19:31,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=4391, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4961, PETRI_PLACES=185, PETRI_TRANSITIONS=425} [2023-11-17 16:19:31,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2023-11-17 16:19:31,616 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 425 transitions, 4961 flow [2023-11-17 16:19:31,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.875) internal successors, (1559), 8 states have internal predecessors, (1559), 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 16:19:31,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:31,616 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:31,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:19:31,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 16:19:31,817 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:31,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:31,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1474433459, now seen corresponding path program 5 times [2023-11-17 16:19:31,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:31,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640363987] [2023-11-17 16:19:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:31,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:19:32,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:32,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640363987] [2023-11-17 16:19:32,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640363987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:32,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:19:32,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:19:32,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104792413] [2023-11-17 16:19:32,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:32,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:19:32,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:32,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:19:32,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:19:32,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 463 [2023-11-17 16:19:32,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 425 transitions, 4961 flow. Second operand has 7 states, 7 states have (on average 201.42857142857142) internal successors, (1410), 7 states have internal predecessors, (1410), 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 16:19:32,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:32,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 463 [2023-11-17 16:19:32,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:37,437 INFO L124 PetriNetUnfolderBase]: 23561/33697 cut-off events. [2023-11-17 16:19:37,437 INFO L125 PetriNetUnfolderBase]: For 956176/956176 co-relation queries the response was YES. [2023-11-17 16:19:37,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244744 conditions, 33697 events. 23561/33697 cut-off events. For 956176/956176 co-relation queries the response was YES. Maximal size of possible extension queue 1246. Compared 205680 event pairs, 9484 based on Foata normal form. 396/34091 useless extension candidates. Maximal degree in co-relation 226556. Up to 31767 conditions per place. [2023-11-17 16:19:37,909 INFO L140 encePairwiseOnDemand]: 457/463 looper letters, 375 selfloop transitions, 105 changer transitions 0/480 dead transitions. [2023-11-17 16:19:37,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 480 transitions, 6472 flow [2023-11-17 16:19:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:19:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:19:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1269 transitions. [2023-11-17 16:19:37,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45680345572354214 [2023-11-17 16:19:37,911 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1269 transitions. [2023-11-17 16:19:37,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1269 transitions. [2023-11-17 16:19:37,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:37,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1269 transitions. [2023-11-17 16:19:37,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.5) internal successors, (1269), 6 states have internal predecessors, (1269), 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 16:19:37,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 463.0) internal successors, (3241), 7 states have internal predecessors, (3241), 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 16:19:37,914 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 463.0) internal successors, (3241), 7 states have internal predecessors, (3241), 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 16:19:37,914 INFO L175 Difference]: Start difference. First operand has 185 places, 425 transitions, 4961 flow. Second operand 6 states and 1269 transitions. [2023-11-17 16:19:37,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 480 transitions, 6472 flow [2023-11-17 16:19:42,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 480 transitions, 6242 flow, removed 38 selfloop flow, removed 3 redundant places. [2023-11-17 16:19:42,246 INFO L231 Difference]: Finished difference. Result has 188 places, 435 transitions, 5176 flow [2023-11-17 16:19:42,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=4777, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5176, PETRI_PLACES=188, PETRI_TRANSITIONS=435} [2023-11-17 16:19:42,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2023-11-17 16:19:42,247 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 435 transitions, 5176 flow [2023-11-17 16:19:42,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.42857142857142) internal successors, (1410), 7 states have internal predecessors, (1410), 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 16:19:42,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:42,247 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:42,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-17 16:19:42,247 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:42,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:42,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2077713729, now seen corresponding path program 6 times [2023-11-17 16:19:42,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:42,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305518177] [2023-11-17 16:19:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:42,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:19:42,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:42,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305518177] [2023-11-17 16:19:42,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305518177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:42,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:19:42,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:19:42,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080413021] [2023-11-17 16:19:42,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:42,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:19:42,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:42,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:19:42,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:19:42,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 463 [2023-11-17 16:19:42,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 435 transitions, 5176 flow. Second operand has 7 states, 7 states have (on average 201.42857142857142) internal successors, (1410), 7 states have internal predecessors, (1410), 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 16:19:42,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:42,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 463 [2023-11-17 16:19:42,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:50,283 INFO L124 PetriNetUnfolderBase]: 32677/46389 cut-off events. [2023-11-17 16:19:50,284 INFO L125 PetriNetUnfolderBase]: For 1229863/1229863 co-relation queries the response was YES. [2023-11-17 16:19:50,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325933 conditions, 46389 events. 32677/46389 cut-off events. For 1229863/1229863 co-relation queries the response was YES. Maximal size of possible extension queue 1707. Compared 294105 event pairs, 9688 based on Foata normal form. 994/47381 useless extension candidates. Maximal degree in co-relation 302987. Up to 28931 conditions per place. [2023-11-17 16:19:50,807 INFO L140 encePairwiseOnDemand]: 455/463 looper letters, 588 selfloop transitions, 119 changer transitions 37/744 dead transitions. [2023-11-17 16:19:50,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 744 transitions, 9430 flow [2023-11-17 16:19:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:19:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:19:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2339 transitions. [2023-11-17 16:19:50,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925780483015904 [2023-11-17 16:19:50,810 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2339 transitions. [2023-11-17 16:19:50,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2339 transitions. [2023-11-17 16:19:50,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:50,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2339 transitions. [2023-11-17 16:19:50,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 212.63636363636363) internal successors, (2339), 11 states have internal predecessors, (2339), 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 16:19:50,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 463.0) internal successors, (5556), 12 states have internal predecessors, (5556), 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 16:19:50,816 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 463.0) internal successors, (5556), 12 states have internal predecessors, (5556), 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 16:19:50,816 INFO L175 Difference]: Start difference. First operand has 188 places, 435 transitions, 5176 flow. Second operand 11 states and 2339 transitions. [2023-11-17 16:19:50,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 744 transitions, 9430 flow [2023-11-17 16:19:55,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 744 transitions, 9126 flow, removed 56 selfloop flow, removed 5 redundant places. [2023-11-17 16:19:55,569 INFO L231 Difference]: Finished difference. Result has 199 places, 452 transitions, 5409 flow [2023-11-17 16:19:55,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=4563, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5409, PETRI_PLACES=199, PETRI_TRANSITIONS=452} [2023-11-17 16:19:55,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2023-11-17 16:19:55,569 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 452 transitions, 5409 flow [2023-11-17 16:19:55,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.42857142857142) internal successors, (1410), 7 states have internal predecessors, (1410), 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 16:19:55,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:55,570 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:55,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-17 16:19:55,570 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:55,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:55,570 INFO L85 PathProgramCache]: Analyzing trace with hash 669743139, now seen corresponding path program 7 times [2023-11-17 16:19:55,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:55,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149302502] [2023-11-17 16:19:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:55,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:19:55,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:55,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149302502] [2023-11-17 16:19:55,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149302502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:19:55,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810000189] [2023-11-17 16:19:55,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:19:55,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:19:55,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:19:55,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:19:55,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:19:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:56,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 16:19:56,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:19:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:19:56,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:19:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:19:56,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810000189] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:19:56,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:19:56,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9] total 19 [2023-11-17 16:19:56,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398328380] [2023-11-17 16:19:56,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:19:56,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:19:56,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:56,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:19:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:19:56,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 463 [2023-11-17 16:19:56,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 452 transitions, 5409 flow. Second operand has 20 states, 20 states have (on average 194.65) internal successors, (3893), 20 states have internal predecessors, (3893), 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 16:19:56,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:56,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 463 [2023-11-17 16:19:56,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand