/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-queue-add-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:30:31,558 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:30:31,613 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 16:30:31,650 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:30:31,650 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:30:31,651 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:30:31,651 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:30:31,651 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:30:31,652 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:30:31,652 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:30:31,652 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:30:31,653 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:30:31,653 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:30:31,653 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:30:31,654 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:30:31,654 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:30:31,654 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:30:31,655 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:30:31,655 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:30:31,655 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:30:31,656 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:30:31,660 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:30:31,660 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:30:31,660 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:30:31,664 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:30:31,665 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:30:31,665 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:30:31,666 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:30:31,667 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:30:31,667 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:30:31,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:30:31,668 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:30:31,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:30:31,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:30:31,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:30:31,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:30:31,904 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:30:31,905 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:30:31,907 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-11-17 16:30:33,094 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:30:33,273 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:30:33,274 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-11-17 16:30:33,280 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dd684a61/522ded8f44b848398ffc8b073a953b67/FLAGa489bc811 [2023-11-17 16:30:33,300 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dd684a61/522ded8f44b848398ffc8b073a953b67 [2023-11-17 16:30:33,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:30:33,304 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:30:33,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:30:33,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:30:33,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:30:33,314 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,315 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb5d3c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33, skipping insertion in model container [2023-11-17 16:30:33,315 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,348 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:30:33,500 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-queue-add-3.wvr.c[3451,3464] [2023-11-17 16:30:33,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:30:33,516 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:30:33,538 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-queue-add-3.wvr.c[3451,3464] [2023-11-17 16:30:33,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:30:33,548 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:30:33,548 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:30:33,553 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:30:33,553 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33 WrapperNode [2023-11-17 16:30:33,554 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:30:33,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:30:33,555 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:30:33,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:30:33,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,568 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,590 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 257 [2023-11-17 16:30:33,591 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:30:33,591 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:30:33,592 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:30:33,592 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:30:33,604 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,608 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,608 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,616 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,619 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,621 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,622 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,625 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:30:33,626 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:30:33,626 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:30:33,626 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:30:33,627 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (1/1) ... [2023-11-17 16:30:33,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:30:33,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:33,654 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 16:30:33,660 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 16:30:33,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:30:33,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:30:33,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:30:33,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:30:33,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:30:33,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:30:33,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:30:33,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:30:33,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:30:33,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:30:33,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:30:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:30:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:30:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:30:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:30:33,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:30:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:30:33,680 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 16:30:33,774 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:30:33,775 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:30:34,151 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:30:34,253 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:30:34,253 INFO L307 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-17 16:30:34,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:30:34 BoogieIcfgContainer [2023-11-17 16:30:34,254 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:30:34,256 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:30:34,256 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:30:34,259 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:30:34,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:30:33" (1/3) ... [2023-11-17 16:30:34,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4ba3ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:30:34, skipping insertion in model container [2023-11-17 16:30:34,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:33" (2/3) ... [2023-11-17 16:30:34,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4ba3ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:30:34, skipping insertion in model container [2023-11-17 16:30:34,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:30:34" (3/3) ... [2023-11-17 16:30:34,261 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-11-17 16:30:34,276 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:30:34,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:30:34,276 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:30:34,354 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 16:30:34,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 220 transitions, 461 flow [2023-11-17 16:30:34,490 INFO L124 PetriNetUnfolderBase]: 18/217 cut-off events. [2023-11-17 16:30:34,490 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:30:34,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 217 events. 18/217 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 121 event pairs, 0 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 178. Up to 3 conditions per place. [2023-11-17 16:30:34,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 220 transitions, 461 flow [2023-11-17 16:30:34,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 206 transitions, 430 flow [2023-11-17 16:30:34,510 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:30:34,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 206 transitions, 430 flow [2023-11-17 16:30:34,529 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 206 transitions, 430 flow [2023-11-17 16:30:34,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 206 transitions, 430 flow [2023-11-17 16:30:34,585 INFO L124 PetriNetUnfolderBase]: 18/206 cut-off events. [2023-11-17 16:30:34,585 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:30:34,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 206 events. 18/206 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 120 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 178. Up to 3 conditions per place. [2023-11-17 16:30:34,589 INFO L119 LiptonReduction]: Number of co-enabled transitions 1738 [2023-11-17 16:30:40,739 INFO L134 LiptonReduction]: Checked pairs total: 2251 [2023-11-17 16:30:40,740 INFO L136 LiptonReduction]: Total number of compositions: 220 [2023-11-17 16:30:40,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:30:40,758 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;@626aff48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:30:40,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 16:30:40,763 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:30:40,764 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-17 16:30:40,764 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:30:40,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:40,765 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] [2023-11-17 16:30:40,765 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 1 more)] === [2023-11-17 16:30:40,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash -492113771, now seen corresponding path program 1 times [2023-11-17 16:30:40,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:40,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945200374] [2023-11-17 16:30:40,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:40,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:41,018 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 16:30:41,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:41,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945200374] [2023-11-17 16:30:41,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945200374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:41,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:41,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:30:41,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457304007] [2023-11-17 16:30:41,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:41,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 16:30:41,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:41,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 16:30:41,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 16:30:41,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 440 [2023-11-17 16:30:41,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 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 16:30:41,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:41,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 440 [2023-11-17 16:30:41,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:41,181 INFO L124 PetriNetUnfolderBase]: 291/428 cut-off events. [2023-11-17 16:30:41,181 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-17 16:30:41,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 428 events. 291/428 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1104 event pairs, 191 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 702. Up to 429 conditions per place. [2023-11-17 16:30:41,189 INFO L140 encePairwiseOnDemand]: 439/440 looper letters, 27 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-11-17 16:30:41,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 126 flow [2023-11-17 16:30:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 16:30:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 16:30:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 418 transitions. [2023-11-17 16:30:41,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-11-17 16:30:41,211 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 418 transitions. [2023-11-17 16:30:41,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 418 transitions. [2023-11-17 16:30:41,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:41,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 418 transitions. [2023-11-17 16:30:41,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 209.0) internal successors, (418), 2 states have internal predecessors, (418), 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 16:30:41,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 440.0) internal successors, (1320), 3 states have internal predecessors, (1320), 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 16:30:41,229 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 440.0) internal successors, (1320), 3 states have internal predecessors, (1320), 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 16:30:41,231 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 418 transitions. [2023-11-17 16:30:41,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 126 flow [2023-11-17 16:30:41,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 114 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 16:30:41,238 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-11-17 16:30:41,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-17 16:30:41,243 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-11-17 16:30:41,244 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-11-17 16:30:41,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 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 16:30:41,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:41,244 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] [2023-11-17 16:30:41,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:30:41,245 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 1 more)] === [2023-11-17 16:30:41,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:41,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2027316124, now seen corresponding path program 1 times [2023-11-17 16:30:41,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:41,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154325174] [2023-11-17 16:30:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:41,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:41,524 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 16:30:41,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:41,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154325174] [2023-11-17 16:30:41,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154325174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:41,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:41,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:30:41,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261774154] [2023-11-17 16:30:41,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:41,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:41,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:41,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:41,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:30:41,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 440 [2023-11-17 16:30:41,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 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 16:30:41,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:41,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 440 [2023-11-17 16:30:41,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:41,660 INFO L124 PetriNetUnfolderBase]: 339/515 cut-off events. [2023-11-17 16:30:41,660 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 16:30:41,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 515 events. 339/515 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1462 event pairs, 230 based on Foata normal form. 34/439 useless extension candidates. Maximal degree in co-relation 1053. Up to 429 conditions per place. [2023-11-17 16:30:41,663 INFO L140 encePairwiseOnDemand]: 434/440 looper letters, 26 selfloop transitions, 2 changer transitions 14/42 dead transitions. [2023-11-17 16:30:41,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 177 flow [2023-11-17 16:30:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 709 transitions. [2023-11-17 16:30:41,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028409090909091 [2023-11-17 16:30:41,667 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 709 transitions. [2023-11-17 16:30:41,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 709 transitions. [2023-11-17 16:30:41,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:41,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 709 transitions. [2023-11-17 16:30:41,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 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 16:30:41,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 440.0) internal successors, (2200), 5 states have internal predecessors, (2200), 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 16:30:41,675 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 440.0) internal successors, (2200), 5 states have internal predecessors, (2200), 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 16:30:41,675 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 4 states and 709 transitions. [2023-11-17 16:30:41,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 177 flow [2023-11-17 16:30:41,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 42 transitions, 177 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 16:30:41,678 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 78 flow [2023-11-17 16:30:41,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-17 16:30:41,679 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-17 16:30:41,679 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 78 flow [2023-11-17 16:30:41,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 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 16:30:41,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:41,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:41,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:30:41,685 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 1 more)] === [2023-11-17 16:30:41,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1251733642, now seen corresponding path program 1 times [2023-11-17 16:30:41,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:41,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166419825] [2023-11-17 16:30:41,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:41,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:41,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:41,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166419825] [2023-11-17 16:30:41,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166419825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:41,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:41,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:30:41,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086115581] [2023-11-17 16:30:41,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:41,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:41,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:41,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:41,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:30:41,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 440 [2023-11-17 16:30:41,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 171.75) internal successors, (687), 4 states have internal predecessors, (687), 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 16:30:41,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:41,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 440 [2023-11-17 16:30:41,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:42,015 INFO L124 PetriNetUnfolderBase]: 402/614 cut-off events. [2023-11-17 16:30:42,016 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-17 16:30:42,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1428 conditions, 614 events. 402/614 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1891 event pairs, 282 based on Foata normal form. 46/539 useless extension candidates. Maximal degree in co-relation 1422. Up to 430 conditions per place. [2023-11-17 16:30:42,019 INFO L140 encePairwiseOnDemand]: 433/440 looper letters, 27 selfloop transitions, 2 changer transitions 15/44 dead transitions. [2023-11-17 16:30:42,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 208 flow [2023-11-17 16:30:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 711 transitions. [2023-11-17 16:30:42,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40397727272727274 [2023-11-17 16:30:42,022 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 711 transitions. [2023-11-17 16:30:42,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 711 transitions. [2023-11-17 16:30:42,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:42,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 711 transitions. [2023-11-17 16:30:42,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 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 16:30:42,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 440.0) internal successors, (2200), 5 states have internal predecessors, (2200), 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 16:30:42,028 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 440.0) internal successors, (2200), 5 states have internal predecessors, (2200), 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 16:30:42,028 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 78 flow. Second operand 4 states and 711 transitions. [2023-11-17 16:30:42,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 208 flow [2023-11-17 16:30:42,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:30:42,030 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2023-11-17 16:30:42,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-17 16:30:42,031 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-17 16:30:42,031 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2023-11-17 16:30:42,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.75) internal successors, (687), 4 states have internal predecessors, (687), 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 16:30:42,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:42,032 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] [2023-11-17 16:30:42,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:30:42,032 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 1 more)] === [2023-11-17 16:30:42,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:42,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1573690145, now seen corresponding path program 1 times [2023-11-17 16:30:42,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:42,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139510714] [2023-11-17 16:30:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:42,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:30:42,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:42,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139510714] [2023-11-17 16:30:42,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139510714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:42,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:42,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:30:42,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441080469] [2023-11-17 16:30:42,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:42,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:30:42,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:42,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:30:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:30:42,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 440 [2023-11-17 16:30:42,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 186.42857142857142) internal successors, (1305), 7 states have internal predecessors, (1305), 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 16:30:42,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:42,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 440 [2023-11-17 16:30:42,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:42,542 INFO L124 PetriNetUnfolderBase]: 657/965 cut-off events. [2023-11-17 16:30:42,543 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2023-11-17 16:30:42,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2532 conditions, 965 events. 657/965 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3355 event pairs, 191 based on Foata normal form. 1/719 useless extension candidates. Maximal degree in co-relation 2524. Up to 390 conditions per place. [2023-11-17 16:30:42,548 INFO L140 encePairwiseOnDemand]: 433/440 looper letters, 66 selfloop transitions, 8 changer transitions 2/76 dead transitions. [2023-11-17 16:30:42,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 388 flow [2023-11-17 16:30:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:30:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:30:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1173 transitions. [2023-11-17 16:30:42,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44431818181818183 [2023-11-17 16:30:42,552 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1173 transitions. [2023-11-17 16:30:42,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1173 transitions. [2023-11-17 16:30:42,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:42,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1173 transitions. [2023-11-17 16:30:42,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.5) internal successors, (1173), 6 states have internal predecessors, (1173), 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 16:30:42,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 440.0) internal successors, (3080), 7 states have internal predecessors, (3080), 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 16:30:42,561 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 440.0) internal successors, (3080), 7 states have internal predecessors, (3080), 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 16:30:42,562 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 6 states and 1173 transitions. [2023-11-17 16:30:42,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 388 flow [2023-11-17 16:30:42,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 76 transitions, 384 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:30:42,566 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 148 flow [2023-11-17 16:30:42,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-11-17 16:30:42,567 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2023-11-17 16:30:42,567 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 148 flow [2023-11-17 16:30:42,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 186.42857142857142) internal successors, (1305), 7 states have internal predecessors, (1305), 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 16:30:42,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:42,568 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] [2023-11-17 16:30:42,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:30:42,569 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 1 more)] === [2023-11-17 16:30:42,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:42,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1640988719, now seen corresponding path program 1 times [2023-11-17 16:30:42,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:42,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010379798] [2023-11-17 16:30:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:42,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:42,768 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 16:30:42,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:42,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010379798] [2023-11-17 16:30:42,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010379798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:42,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600223399] [2023-11-17 16:30:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:42,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:42,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:42,775 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 16:30:42,807 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 16:30:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:42,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:30:42,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:42,996 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 16:30:42,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:43,129 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 16:30:43,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600223399] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:30:43,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:30:43,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 16:30:43,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869178152] [2023-11-17 16:30:43,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:30:43,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:30:43,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:30:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:30:43,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 440 [2023-11-17 16:30:43,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 148 flow. Second operand has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 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 16:30:43,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:43,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 440 [2023-11-17 16:30:43,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:43,468 INFO L124 PetriNetUnfolderBase]: 1151/1728 cut-off events. [2023-11-17 16:30:43,469 INFO L125 PetriNetUnfolderBase]: For 1847/1847 co-relation queries the response was YES. [2023-11-17 16:30:43,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5301 conditions, 1728 events. 1151/1728 cut-off events. For 1847/1847 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7032 event pairs, 548 based on Foata normal form. 98/1646 useless extension candidates. Maximal degree in co-relation 5290. Up to 965 conditions per place. [2023-11-17 16:30:43,479 INFO L140 encePairwiseOnDemand]: 434/440 looper letters, 69 selfloop transitions, 6 changer transitions 7/82 dead transitions. [2023-11-17 16:30:43,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 82 transitions, 506 flow [2023-11-17 16:30:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:30:43,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:30:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1051 transitions. [2023-11-17 16:30:43,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39810606060606063 [2023-11-17 16:30:43,483 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1051 transitions. [2023-11-17 16:30:43,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1051 transitions. [2023-11-17 16:30:43,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:43,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1051 transitions. [2023-11-17 16:30:43,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.16666666666666) internal successors, (1051), 6 states have internal predecessors, (1051), 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 16:30:43,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 440.0) internal successors, (3080), 7 states have internal predecessors, (3080), 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 16:30:43,489 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 440.0) internal successors, (3080), 7 states have internal predecessors, (3080), 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 16:30:43,489 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 148 flow. Second operand 6 states and 1051 transitions. [2023-11-17 16:30:43,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 82 transitions, 506 flow [2023-11-17 16:30:43,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 82 transitions, 499 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 16:30:43,493 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 210 flow [2023-11-17 16:30:43,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-11-17 16:30:43,494 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-11-17 16:30:43,494 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 210 flow [2023-11-17 16:30:43,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 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 16:30:43,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:43,495 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] [2023-11-17 16:30:43,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 16:30:43,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:43,705 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 1 more)] === [2023-11-17 16:30:43,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:43,706 INFO L85 PathProgramCache]: Analyzing trace with hash 914284063, now seen corresponding path program 1 times [2023-11-17 16:30:43,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:43,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163422107] [2023-11-17 16:30:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:43,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:43,802 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 16:30:43,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:43,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163422107] [2023-11-17 16:30:43,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163422107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:43,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:43,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:30:43,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146034559] [2023-11-17 16:30:43,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:43,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:43,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:43,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:43,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:30:43,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 440 [2023-11-17 16:30:43,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 197.25) internal successors, (789), 4 states have internal predecessors, (789), 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 16:30:43,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:43,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 440 [2023-11-17 16:30:43,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:44,145 INFO L124 PetriNetUnfolderBase]: 1721/2670 cut-off events. [2023-11-17 16:30:44,146 INFO L125 PetriNetUnfolderBase]: For 4051/4051 co-relation queries the response was YES. [2023-11-17 16:30:44,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9081 conditions, 2670 events. 1721/2670 cut-off events. For 4051/4051 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12295 event pairs, 400 based on Foata normal form. 204/2494 useless extension candidates. Maximal degree in co-relation 9066. Up to 1093 conditions per place. [2023-11-17 16:30:44,164 INFO L140 encePairwiseOnDemand]: 435/440 looper letters, 71 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2023-11-17 16:30:44,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 81 transitions, 577 flow [2023-11-17 16:30:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 827 transitions. [2023-11-17 16:30:44,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46988636363636366 [2023-11-17 16:30:44,167 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 827 transitions. [2023-11-17 16:30:44,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 827 transitions. [2023-11-17 16:30:44,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:44,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 827 transitions. [2023-11-17 16:30:44,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 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 16:30:44,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 440.0) internal successors, (2200), 5 states have internal predecessors, (2200), 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 16:30:44,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 440.0) internal successors, (2200), 5 states have internal predecessors, (2200), 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 16:30:44,172 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 210 flow. Second operand 4 states and 827 transitions. [2023-11-17 16:30:44,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 81 transitions, 577 flow [2023-11-17 16:30:44,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 81 transitions, 523 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-11-17 16:30:44,178 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 282 flow [2023-11-17 16:30:44,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-17 16:30:44,178 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2023-11-17 16:30:44,179 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 282 flow [2023-11-17 16:30:44,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.25) internal successors, (789), 4 states have internal predecessors, (789), 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 16:30:44,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:44,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 16:30:44,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 16:30:44,179 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 1 more)] === [2023-11-17 16:30:44,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:44,180 INFO L85 PathProgramCache]: Analyzing trace with hash -879822225, now seen corresponding path program 2 times [2023-11-17 16:30:44,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:44,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662697585] [2023-11-17 16:30:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:44,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:44,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:44,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662697585] [2023-11-17 16:30:44,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662697585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:44,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462399678] [2023-11-17 16:30:44,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:30:44,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:44,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:44,841 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 16:30:44,868 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 16:30:44,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:30:44,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:30:45,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:30:45,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:45,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:45,402 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:30:45,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-17 16:30:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:45,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462399678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:30:45,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:30:45,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-17 16:30:45,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37007924] [2023-11-17 16:30:45,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:30:45,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:30:45,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:45,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:30:45,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:30:45,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 440 [2023-11-17 16:30:45,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 282 flow. Second operand has 22 states, 22 states have (on average 146.95454545454547) internal successors, (3233), 22 states have internal predecessors, (3233), 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 16:30:45,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:45,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 440 [2023-11-17 16:30:45,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:47,882 INFO L124 PetriNetUnfolderBase]: 6209/9271 cut-off events. [2023-11-17 16:30:47,883 INFO L125 PetriNetUnfolderBase]: For 14473/14473 co-relation queries the response was YES. [2023-11-17 16:30:47,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36050 conditions, 9271 events. 6209/9271 cut-off events. For 14473/14473 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 50869 event pairs, 361 based on Foata normal form. 42/7786 useless extension candidates. Maximal degree in co-relation 36034. Up to 3137 conditions per place. [2023-11-17 16:30:47,964 INFO L140 encePairwiseOnDemand]: 430/440 looper letters, 307 selfloop transitions, 80 changer transitions 0/387 dead transitions. [2023-11-17 16:30:47,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 387 transitions, 3022 flow [2023-11-17 16:30:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:30:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:30:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3884 transitions. [2023-11-17 16:30:47,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35309090909090907 [2023-11-17 16:30:47,976 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3884 transitions. [2023-11-17 16:30:47,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3884 transitions. [2023-11-17 16:30:47,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:47,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3884 transitions. [2023-11-17 16:30:47,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 155.36) internal successors, (3884), 25 states have internal predecessors, (3884), 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 16:30:48,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 440.0) internal successors, (11440), 26 states have internal predecessors, (11440), 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 16:30:48,005 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 440.0) internal successors, (11440), 26 states have internal predecessors, (11440), 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 16:30:48,005 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 282 flow. Second operand 25 states and 3884 transitions. [2023-11-17 16:30:48,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 387 transitions, 3022 flow [2023-11-17 16:30:48,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 387 transitions, 2775 flow, removed 123 selfloop flow, removed 1 redundant places. [2023-11-17 16:30:48,023 INFO L231 Difference]: Finished difference. Result has 88 places, 145 transitions, 1127 flow [2023-11-17 16:30:48,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1127, PETRI_PLACES=88, PETRI_TRANSITIONS=145} [2023-11-17 16:30:48,024 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 56 predicate places. [2023-11-17 16:30:48,024 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 145 transitions, 1127 flow [2023-11-17 16:30:48,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 146.95454545454547) internal successors, (3233), 22 states have internal predecessors, (3233), 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 16:30:48,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:48,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 16:30:48,036 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 16:30:48,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-17 16:30:48,233 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 1 more)] === [2023-11-17 16:30:48,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash -993759699, now seen corresponding path program 3 times [2023-11-17 16:30:48,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:48,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445319386] [2023-11-17 16:30:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:48,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:48,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:48,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445319386] [2023-11-17 16:30:48,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445319386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:48,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163092317] [2023-11-17 16:30:48,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:30:48,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:48,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:48,924 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 16:30:48,948 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 16:30:49,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:30:49,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:30:49,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:30:49,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:49,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2023-11-17 16:30:49,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:30:49,558 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:30:49,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-17 16:30:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:49,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:49,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:30:49,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-17 16:30:49,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-17 16:30:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:50,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163092317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:30:50,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:30:50,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 16:30:50,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926488430] [2023-11-17 16:30:50,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:30:50,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:30:50,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:50,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:30:50,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:30:50,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 440 [2023-11-17 16:30:50,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 145 transitions, 1127 flow. Second operand has 25 states, 25 states have (on average 141.68) internal successors, (3542), 25 states have internal predecessors, (3542), 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 16:30:50,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:50,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 440 [2023-11-17 16:30:50,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:55,163 INFO L124 PetriNetUnfolderBase]: 16453/24168 cut-off events. [2023-11-17 16:30:55,164 INFO L125 PetriNetUnfolderBase]: For 154202/154202 co-relation queries the response was YES. [2023-11-17 16:30:55,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117519 conditions, 24168 events. 16453/24168 cut-off events. For 154202/154202 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 150075 event pairs, 1696 based on Foata normal form. 536/22338 useless extension candidates. Maximal degree in co-relation 117489. Up to 8639 conditions per place. [2023-11-17 16:30:55,410 INFO L140 encePairwiseOnDemand]: 428/440 looper letters, 484 selfloop transitions, 205 changer transitions 1/690 dead transitions. [2023-11-17 16:30:55,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 690 transitions, 6689 flow [2023-11-17 16:30:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:30:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:30:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4339 transitions. [2023-11-17 16:30:55,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34004702194357367 [2023-11-17 16:30:55,422 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4339 transitions. [2023-11-17 16:30:55,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4339 transitions. [2023-11-17 16:30:55,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:55,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4339 transitions. [2023-11-17 16:30:55,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 149.6206896551724) internal successors, (4339), 29 states have internal predecessors, (4339), 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 16:30:55,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 440.0) internal successors, (13200), 30 states have internal predecessors, (13200), 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 16:30:55,468 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 440.0) internal successors, (13200), 30 states have internal predecessors, (13200), 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 16:30:55,468 INFO L175 Difference]: Start difference. First operand has 88 places, 145 transitions, 1127 flow. Second operand 29 states and 4339 transitions. [2023-11-17 16:30:55,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 690 transitions, 6689 flow [2023-11-17 16:30:56,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 690 transitions, 5952 flow, removed 366 selfloop flow, removed 2 redundant places. [2023-11-17 16:30:56,585 INFO L231 Difference]: Finished difference. Result has 133 places, 338 transitions, 3189 flow [2023-11-17 16:30:56,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3189, PETRI_PLACES=133, PETRI_TRANSITIONS=338} [2023-11-17 16:30:56,586 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 101 predicate places. [2023-11-17 16:30:56,586 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 338 transitions, 3189 flow [2023-11-17 16:30:56,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 141.68) internal successors, (3542), 25 states have internal predecessors, (3542), 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 16:30:56,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:56,587 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 16:30:56,596 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 16:30:56,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:56,793 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 1 more)] === [2023-11-17 16:30:56,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:56,794 INFO L85 PathProgramCache]: Analyzing trace with hash -935673489, now seen corresponding path program 4 times [2023-11-17 16:30:56,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:56,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210227600] [2023-11-17 16:30:56,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:56,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:57,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:57,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210227600] [2023-11-17 16:30:57,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210227600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:57,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829008170] [2023-11-17 16:30:57,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:30:57,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:57,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:57,573 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 16:30:57,593 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 16:30:57,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:30:57,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:30:57,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 16:30:57,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:57,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 250 [2023-11-17 16:30:57,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:30:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:30:57,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:30:57,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829008170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:57,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:30:57,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2023-11-17 16:30:57,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659197630] [2023-11-17 16:30:57,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:57,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:30:57,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:57,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:30:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:30:57,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 440 [2023-11-17 16:30:57,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 338 transitions, 3189 flow. Second operand has 7 states, 7 states have (on average 165.57142857142858) internal successors, (1159), 7 states have internal predecessors, (1159), 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 16:30:57,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:57,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 440 [2023-11-17 16:30:57,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:31:01,142 INFO L124 PetriNetUnfolderBase]: 14044/20697 cut-off events. [2023-11-17 16:31:01,142 INFO L125 PetriNetUnfolderBase]: For 211692/211692 co-relation queries the response was YES. [2023-11-17 16:31:01,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107134 conditions, 20697 events. 14044/20697 cut-off events. For 211692/211692 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 124873 event pairs, 3811 based on Foata normal form. 630/20497 useless extension candidates. Maximal degree in co-relation 107085. Up to 14667 conditions per place. [2023-11-17 16:31:01,472 INFO L140 encePairwiseOnDemand]: 433/440 looper letters, 316 selfloop transitions, 83 changer transitions 0/399 dead transitions. [2023-11-17 16:31:01,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 399 transitions, 4325 flow [2023-11-17 16:31:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:31:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:31:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1378 transitions. [2023-11-17 16:31:01,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147727272727273 [2023-11-17 16:31:01,476 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1378 transitions. [2023-11-17 16:31:01,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1378 transitions. [2023-11-17 16:31:01,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:01,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1378 transitions. [2023-11-17 16:31:01,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 172.25) internal successors, (1378), 8 states have internal predecessors, (1378), 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 16:31:01,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 440.0) internal successors, (3960), 9 states have internal predecessors, (3960), 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 16:31:01,484 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 440.0) internal successors, (3960), 9 states have internal predecessors, (3960), 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 16:31:01,484 INFO L175 Difference]: Start difference. First operand has 133 places, 338 transitions, 3189 flow. Second operand 8 states and 1378 transitions. [2023-11-17 16:31:01,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 399 transitions, 4325 flow [2023-11-17 16:31:02,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 399 transitions, 4132 flow, removed 76 selfloop flow, removed 12 redundant places. [2023-11-17 16:31:02,666 INFO L231 Difference]: Finished difference. Result has 128 places, 306 transitions, 2952 flow [2023-11-17 16:31:02,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2952, PETRI_PLACES=128, PETRI_TRANSITIONS=306} [2023-11-17 16:31:02,667 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 96 predicate places. [2023-11-17 16:31:02,667 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 306 transitions, 2952 flow [2023-11-17 16:31:02,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.57142857142858) internal successors, (1159), 7 states have internal predecessors, (1159), 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 16:31:02,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:31:02,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 16:31:02,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 16:31:02,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:02,877 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 1 more)] === [2023-11-17 16:31:02,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:31:02,878 INFO L85 PathProgramCache]: Analyzing trace with hash 187686257, now seen corresponding path program 5 times [2023-11-17 16:31:02,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:31:02,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439234677] [2023-11-17 16:31:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:02,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:31:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:31:03,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:31:03,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439234677] [2023-11-17 16:31:03,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439234677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:03,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679148108] [2023-11-17 16:31:03,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:31:03,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:03,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:31:03,696 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 16:31:03,717 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 16:31:03,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:31:03,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:31:03,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 16:31:03,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:31:04,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:31:04,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:31:04,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:31:04,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:31:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:31:04,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:31:04,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:31:04,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 151 [2023-11-17 16:31:04,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-11-17 16:31:04,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-11-17 16:31:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:31:04,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679148108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:31:04,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:31:04,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-11-17 16:31:04,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167398781] [2023-11-17 16:31:04,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:31:04,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 16:31:04,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:31:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 16:31:04,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2023-11-17 16:31:04,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 440 [2023-11-17 16:31:04,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 306 transitions, 2952 flow. Second operand has 27 states, 27 states have (on average 138.33333333333334) internal successors, (3735), 27 states have internal predecessors, (3735), 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 16:31:04,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:31:04,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 440 [2023-11-17 16:31:04,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:31:11,853 INFO L124 PetriNetUnfolderBase]: 20294/30250 cut-off events. [2023-11-17 16:31:11,853 INFO L125 PetriNetUnfolderBase]: For 351009/351009 co-relation queries the response was YES. [2023-11-17 16:31:12,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167210 conditions, 30250 events. 20294/30250 cut-off events. For 351009/351009 co-relation queries the response was YES. Maximal size of possible extension queue 1181. Compared 198834 event pairs, 2870 based on Foata normal form. 159/29758 useless extension candidates. Maximal degree in co-relation 167165. Up to 9324 conditions per place. [2023-11-17 16:31:12,222 INFO L140 encePairwiseOnDemand]: 428/440 looper letters, 663 selfloop transitions, 377 changer transitions 3/1043 dead transitions. [2023-11-17 16:31:12,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 1043 transitions, 11048 flow [2023-11-17 16:31:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 16:31:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 16:31:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6415 transitions. [2023-11-17 16:31:12,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33135330578512395 [2023-11-17 16:31:12,237 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6415 transitions. [2023-11-17 16:31:12,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6415 transitions. [2023-11-17 16:31:12,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:12,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6415 transitions. [2023-11-17 16:31:12,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 145.79545454545453) internal successors, (6415), 44 states have internal predecessors, (6415), 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 16:31:12,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 440.0) internal successors, (19800), 45 states have internal predecessors, (19800), 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 16:31:12,280 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 440.0) internal successors, (19800), 45 states have internal predecessors, (19800), 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 16:31:12,280 INFO L175 Difference]: Start difference. First operand has 128 places, 306 transitions, 2952 flow. Second operand 44 states and 6415 transitions. [2023-11-17 16:31:12,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 1043 transitions, 11048 flow [2023-11-17 16:31:15,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 1043 transitions, 10754 flow, removed 116 selfloop flow, removed 5 redundant places. [2023-11-17 16:31:15,695 INFO L231 Difference]: Finished difference. Result has 187 places, 585 transitions, 7286 flow [2023-11-17 16:31:15,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=7286, PETRI_PLACES=187, PETRI_TRANSITIONS=585} [2023-11-17 16:31:15,696 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 155 predicate places. [2023-11-17 16:31:15,696 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 585 transitions, 7286 flow [2023-11-17 16:31:15,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 138.33333333333334) internal successors, (3735), 27 states have internal predecessors, (3735), 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 16:31:15,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:31:15,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 16:31:15,702 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 16:31:15,898 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,SelfDestructingSolverStorable9 [2023-11-17 16:31:15,898 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 1 more)] === [2023-11-17 16:31:15,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:31:15,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1159750590, now seen corresponding path program 1 times [2023-11-17 16:31:15,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:31:15,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761723525] [2023-11-17 16:31:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:15,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:31:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:31:16,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:31:16,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761723525] [2023-11-17 16:31:16,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761723525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:16,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675916598] [2023-11-17 16:31:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:16,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:16,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:31:16,120 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 16:31:16,141 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 16:31:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:16,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:31:16,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:31:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:31:16,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:31:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675916598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:31:16,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:31:16,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-17 16:31:16,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111115990] [2023-11-17 16:31:16,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:31:16,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:31:16,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:31:16,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:31:16,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:31:16,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 440 [2023-11-17 16:31:16,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 585 transitions, 7286 flow. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 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 16:31:16,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:31:16,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 440 [2023-11-17 16:31:16,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:31:22,143 INFO L124 PetriNetUnfolderBase]: 22311/33392 cut-off events. [2023-11-17 16:31:22,143 INFO L125 PetriNetUnfolderBase]: For 489662/489662 co-relation queries the response was YES. [2023-11-17 16:31:22,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212558 conditions, 33392 events. 22311/33392 cut-off events. For 489662/489662 co-relation queries the response was YES. Maximal size of possible extension queue 1323. Compared 223801 event pairs, 5407 based on Foata normal form. 238/33113 useless extension candidates. Maximal degree in co-relation 212495. Up to 26687 conditions per place. [2023-11-17 16:31:22,681 INFO L140 encePairwiseOnDemand]: 436/440 looper letters, 562 selfloop transitions, 129 changer transitions 14/705 dead transitions. [2023-11-17 16:31:22,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 705 transitions, 10204 flow [2023-11-17 16:31:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:31:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:31:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 831 transitions. [2023-11-17 16:31:22,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721590909090909 [2023-11-17 16:31:22,683 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 831 transitions. [2023-11-17 16:31:22,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 831 transitions. [2023-11-17 16:31:22,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:22,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 831 transitions. [2023-11-17 16:31:22,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.75) internal successors, (831), 4 states have internal predecessors, (831), 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 16:31:22,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 440.0) internal successors, (2200), 5 states have internal predecessors, (2200), 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 16:31:22,687 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 440.0) internal successors, (2200), 5 states have internal predecessors, (2200), 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 16:31:22,687 INFO L175 Difference]: Start difference. First operand has 187 places, 585 transitions, 7286 flow. Second operand 4 states and 831 transitions. [2023-11-17 16:31:22,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 705 transitions, 10204 flow [2023-11-17 16:31:28,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 705 transitions, 9953 flow, removed 107 selfloop flow, removed 10 redundant places. [2023-11-17 16:31:28,097 INFO L231 Difference]: Finished difference. Result has 182 places, 610 transitions, 7971 flow [2023-11-17 16:31:28,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=7040, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=7971, PETRI_PLACES=182, PETRI_TRANSITIONS=610} [2023-11-17 16:31:28,098 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 150 predicate places. [2023-11-17 16:31:28,098 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 610 transitions, 7971 flow [2023-11-17 16:31:28,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 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 16:31:28,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:31:28,098 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 16:31:28,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 16:31:28,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:28,299 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 1 more)] === [2023-11-17 16:31:28,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:31:28,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1069172039, now seen corresponding path program 6 times [2023-11-17 16:31:28,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:31:28,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281565519] [2023-11-17 16:31:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:28,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:31:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:31:29,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:31:29,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281565519] [2023-11-17 16:31:29,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281565519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:29,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884236643] [2023-11-17 16:31:29,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:31:29,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:29,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:31:29,201 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 16:31:29,224 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 16:31:29,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:31:29,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:31:29,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:31:29,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:31:29,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:31:29,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:31:29,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:31:29,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:31:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:31:29,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:31:29,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:31:29,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 151 [2023-11-17 16:31:29,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-11-17 16:31:29,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-11-17 16:31:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 16:31:29,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884236643] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:29,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:31:29,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 8] total 23 [2023-11-17 16:31:29,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509410141] [2023-11-17 16:31:29,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:31:29,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:31:29,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:31:29,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:31:29,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=476, Unknown=4, NotChecked=0, Total=552 [2023-11-17 16:31:29,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 440 [2023-11-17 16:31:29,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 610 transitions, 7971 flow. Second operand has 8 states, 8 states have (on average 162.125) internal successors, (1297), 8 states have internal predecessors, (1297), 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 16:31:29,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:31:29,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 440 [2023-11-17 16:31:29,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:31:35,756 INFO L124 PetriNetUnfolderBase]: 21894/32653 cut-off events. [2023-11-17 16:31:35,757 INFO L125 PetriNetUnfolderBase]: For 488740/488740 co-relation queries the response was YES. [2023-11-17 16:31:36,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212914 conditions, 32653 events. 21894/32653 cut-off events. For 488740/488740 co-relation queries the response was YES. Maximal size of possible extension queue 1307. Compared 217400 event pairs, 3532 based on Foata normal form. 38/32175 useless extension candidates. Maximal degree in co-relation 212848. Up to 16520 conditions per place. [2023-11-17 16:31:36,179 INFO L140 encePairwiseOnDemand]: 433/440 looper letters, 452 selfloop transitions, 268 changer transitions 0/720 dead transitions. [2023-11-17 16:31:36,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 720 transitions, 10442 flow [2023-11-17 16:31:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:31:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:31:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1178 transitions. [2023-11-17 16:31:36,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38246753246753246 [2023-11-17 16:31:36,182 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1178 transitions. [2023-11-17 16:31:36,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1178 transitions. [2023-11-17 16:31:36,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:36,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1178 transitions. [2023-11-17 16:31:36,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.28571428571428) internal successors, (1178), 7 states have internal predecessors, (1178), 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 16:31:36,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 440.0) internal successors, (3520), 8 states have internal predecessors, (3520), 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 16:31:36,186 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 440.0) internal successors, (3520), 8 states have internal predecessors, (3520), 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 16:31:36,186 INFO L175 Difference]: Start difference. First operand has 182 places, 610 transitions, 7971 flow. Second operand 7 states and 1178 transitions. [2023-11-17 16:31:36,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 720 transitions, 10442 flow [2023-11-17 16:31:41,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 720 transitions, 10340 flow, removed 50 selfloop flow, removed 5 redundant places. [2023-11-17 16:31:41,221 INFO L231 Difference]: Finished difference. Result has 180 places, 625 transitions, 9131 flow [2023-11-17 16:31:41,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=7899, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9131, PETRI_PLACES=180, PETRI_TRANSITIONS=625} [2023-11-17 16:31:41,222 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 148 predicate places. [2023-11-17 16:31:41,222 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 625 transitions, 9131 flow [2023-11-17 16:31:41,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 162.125) internal successors, (1297), 8 states have internal predecessors, (1297), 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 16:31:41,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:31:41,223 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 16:31:41,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 16:31:41,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:41,429 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 1 more)] === [2023-11-17 16:31:41,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:31:41,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1415623312, now seen corresponding path program 1 times [2023-11-17 16:31:41,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:31:41,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263081510] [2023-11-17 16:31:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:41,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:31:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:31:41,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:31:41,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263081510] [2023-11-17 16:31:41,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263081510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:41,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063198283] [2023-11-17 16:31:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:41,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:41,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:31:41,545 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:31:41,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:31:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:41,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:31:41,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:31:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:31:41,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:31:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:31:41,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063198283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:31:41,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:31:41,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 16:31:41,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768827135] [2023-11-17 16:31:41,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:31:41,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:31:41,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:31:41,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:31:41,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:31:41,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 440 [2023-11-17 16:31:41,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 625 transitions, 9131 flow. Second operand has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 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 16:31:41,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:31:41,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 440 [2023-11-17 16:31:41,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:31:50,008 INFO L124 PetriNetUnfolderBase]: 28563/43223 cut-off events. [2023-11-17 16:31:50,008 INFO L125 PetriNetUnfolderBase]: For 798463/798463 co-relation queries the response was YES. [2023-11-17 16:31:50,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286950 conditions, 43223 events. 28563/43223 cut-off events. For 798463/798463 co-relation queries the response was YES. Maximal size of possible extension queue 1568. Compared 302923 event pairs, 12130 based on Foata normal form. 1637/44092 useless extension candidates. Maximal degree in co-relation 286885. Up to 32649 conditions per place. [2023-11-17 16:31:50,795 INFO L140 encePairwiseOnDemand]: 435/440 looper letters, 619 selfloop transitions, 7 changer transitions 462/1088 dead transitions. [2023-11-17 16:31:50,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1088 transitions, 17276 flow [2023-11-17 16:31:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:31:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:31:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1042 transitions. [2023-11-17 16:31:50,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946969696969697 [2023-11-17 16:31:50,797 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1042 transitions. [2023-11-17 16:31:50,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1042 transitions. [2023-11-17 16:31:50,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:50,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1042 transitions. [2023-11-17 16:31:50,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.66666666666666) internal successors, (1042), 6 states have internal predecessors, (1042), 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 16:31:50,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 440.0) internal successors, (3080), 7 states have internal predecessors, (3080), 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 16:31:50,801 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 440.0) internal successors, (3080), 7 states have internal predecessors, (3080), 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 16:31:50,801 INFO L175 Difference]: Start difference. First operand has 180 places, 625 transitions, 9131 flow. Second operand 6 states and 1042 transitions. [2023-11-17 16:31:50,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1088 transitions, 17276 flow [2023-11-17 16:31:59,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1088 transitions, 17154 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-17 16:31:59,322 INFO L231 Difference]: Finished difference. Result has 183 places, 626 transitions, 9275 flow [2023-11-17 16:31:59,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=9067, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9275, PETRI_PLACES=183, PETRI_TRANSITIONS=626} [2023-11-17 16:31:59,323 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 151 predicate places. [2023-11-17 16:31:59,323 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 626 transitions, 9275 flow [2023-11-17 16:31:59,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 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 16:31:59,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:31:59,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 16:31:59,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 16:31:59,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 16:31:59,530 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 1 more)] === [2023-11-17 16:31:59,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:31:59,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2037635365, now seen corresponding path program 2 times [2023-11-17 16:31:59,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:31:59,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226868278] [2023-11-17 16:31:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:59,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:31:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:31:59,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:31:59,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226868278] [2023-11-17 16:31:59,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226868278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:59,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524067205] [2023-11-17 16:31:59,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:31:59,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:59,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:31:59,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:31:59,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:32:00,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:32:00,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:00,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 16:32:00,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 16:32:00,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:00,186 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:32:00,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-11-17 16:32:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 16:32:00,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524067205] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:00,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:00,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 3] total 11 [2023-11-17 16:32:00,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910953557] [2023-11-17 16:32:00,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:00,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:32:00,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:00,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:32:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:32:00,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 440 [2023-11-17 16:32:00,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 626 transitions, 9275 flow. Second operand has 12 states, 12 states have (on average 152.41666666666666) internal successors, (1829), 12 states have internal predecessors, (1829), 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 16:32:00,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:00,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 440 [2023-11-17 16:32:00,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:11,402 INFO L124 PetriNetUnfolderBase]: 36184/53334 cut-off events. [2023-11-17 16:32:11,402 INFO L125 PetriNetUnfolderBase]: For 903724/903724 co-relation queries the response was YES. [2023-11-17 16:32:12,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369793 conditions, 53334 events. 36184/53334 cut-off events. For 903724/903724 co-relation queries the response was YES. Maximal size of possible extension queue 2006. Compared 370227 event pairs, 8555 based on Foata normal form. 2052/54536 useless extension candidates. Maximal degree in co-relation 369727. Up to 29513 conditions per place. [2023-11-17 16:32:12,356 INFO L140 encePairwiseOnDemand]: 430/440 looper letters, 1502 selfloop transitions, 190 changer transitions 0/1692 dead transitions. [2023-11-17 16:32:12,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1692 transitions, 27609 flow [2023-11-17 16:32:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 16:32:12,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 16:32:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1875 transitions. [2023-11-17 16:32:12,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35511363636363635 [2023-11-17 16:32:12,359 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1875 transitions. [2023-11-17 16:32:12,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1875 transitions. [2023-11-17 16:32:12,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:12,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1875 transitions. [2023-11-17 16:32:12,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 156.25) internal successors, (1875), 12 states have internal predecessors, (1875), 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 16:32:12,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 440.0) internal successors, (5720), 13 states have internal predecessors, (5720), 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 16:32:12,366 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 440.0) internal successors, (5720), 13 states have internal predecessors, (5720), 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 16:32:12,366 INFO L175 Difference]: Start difference. First operand has 183 places, 626 transitions, 9275 flow. Second operand 12 states and 1875 transitions. [2023-11-17 16:32:12,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1692 transitions, 27609 flow [2023-11-17 16:32:26,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 1692 transitions, 27241 flow, removed 178 selfloop flow, removed 4 redundant places. [2023-11-17 16:32:26,052 INFO L231 Difference]: Finished difference. Result has 192 places, 769 transitions, 11439 flow [2023-11-17 16:32:26,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=9075, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11439, PETRI_PLACES=192, PETRI_TRANSITIONS=769} [2023-11-17 16:32:26,053 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 160 predicate places. [2023-11-17 16:32:26,054 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 769 transitions, 11439 flow [2023-11-17 16:32:26,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.41666666666666) internal successors, (1829), 12 states have internal predecessors, (1829), 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 16:32:26,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:26,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 16:32:26,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:26,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 16:32:26,264 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 1 more)] === [2023-11-17 16:32:26,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:26,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1504395067, now seen corresponding path program 3 times [2023-11-17 16:32:26,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:26,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845595701] [2023-11-17 16:32:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:26,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:32:26,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845595701] [2023-11-17 16:32:26,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845595701] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869243206] [2023-11-17 16:32:26,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:32:26,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:26,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:26,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:26,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:32:26,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:32:26,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:26,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:32:26,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:27,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:32:27,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-17 16:32:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:32:27,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:27,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:32:27,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-11-17 16:32:27,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-17 16:32:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:32:27,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869243206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:27,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:27,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-11-17 16:32:27,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201420607] [2023-11-17 16:32:27,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:27,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:32:27,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:32:27,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:32:27,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 440 [2023-11-17 16:32:27,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 769 transitions, 11439 flow. Second operand has 25 states, 25 states have (on average 143.04) internal successors, (3576), 25 states have internal predecessors, (3576), 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 16:32:27,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:27,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 440 [2023-11-17 16:32:27,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:54,215 INFO L124 PetriNetUnfolderBase]: 77938/114875 cut-off events. [2023-11-17 16:32:54,215 INFO L125 PetriNetUnfolderBase]: For 2080752/2080752 co-relation queries the response was YES. [2023-11-17 16:32:55,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826748 conditions, 114875 events. 77938/114875 cut-off events. For 2080752/2080752 co-relation queries the response was YES. Maximal size of possible extension queue 3930. Compared 874728 event pairs, 11868 based on Foata normal form. 2352/115455 useless extension candidates. Maximal degree in co-relation 826680. Up to 32839 conditions per place. [2023-11-17 16:32:56,516 INFO L140 encePairwiseOnDemand]: 430/440 looper letters, 3605 selfloop transitions, 573 changer transitions 0/4178 dead transitions. [2023-11-17 16:32:56,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 4178 transitions, 71097 flow [2023-11-17 16:32:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:32:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:32:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3589 transitions. [2023-11-17 16:32:56,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3398674242424242 [2023-11-17 16:32:56,521 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3589 transitions. [2023-11-17 16:32:56,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3589 transitions. [2023-11-17 16:32:56,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:56,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3589 transitions. [2023-11-17 16:32:56,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 149.54166666666666) internal successors, (3589), 24 states have internal predecessors, (3589), 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 16:32:56,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 440.0) internal successors, (11000), 25 states have internal predecessors, (11000), 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 16:32:56,535 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 440.0) internal successors, (11000), 25 states have internal predecessors, (11000), 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 16:32:56,535 INFO L175 Difference]: Start difference. First operand has 192 places, 769 transitions, 11439 flow. Second operand 24 states and 3589 transitions. [2023-11-17 16:32:56,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 4178 transitions, 71097 flow [2023-11-17 16:34:11,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 4178 transitions, 69467 flow, removed 50 selfloop flow, removed 5 redundant places. [2023-11-17 16:34:11,854 INFO L231 Difference]: Finished difference. Result has 219 places, 1219 transitions, 22183 flow [2023-11-17 16:34:11,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=11118, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=22183, PETRI_PLACES=219, PETRI_TRANSITIONS=1219} [2023-11-17 16:34:11,855 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 187 predicate places. [2023-11-17 16:34:11,855 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 1219 transitions, 22183 flow [2023-11-17 16:34:11,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 143.04) internal successors, (3576), 25 states have internal predecessors, (3576), 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 16:34:11,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:11,856 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 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 16:34:11,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:12,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 16:34:12,063 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 1 more)] === [2023-11-17 16:34:12,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:12,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1335810970, now seen corresponding path program 4 times [2023-11-17 16:34:12,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:12,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956735910] [2023-11-17 16:34:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:12,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:13,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:13,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956735910] [2023-11-17 16:34:13,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956735910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:13,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159880562] [2023-11-17 16:34:13,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:34:13,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:13,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:13,369 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:13,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:34:13,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:34:13,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:13,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 16:34:13,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:13,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-17 16:34:13,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-17 16:34:13,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 16:34:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 16:34:13,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 16:34:13,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-17 16:34:13,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-17 16:34:13,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-17 16:34:13,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-17 16:34:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 16:34:13,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-17 16:34:13,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:13,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 16:34:13,746 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 16:34:13,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-17 16:34:14,165 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-17 16:34:14,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 29 [2023-11-17 16:34:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:34:14,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:14,248 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_604 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_604) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2023-11-17 16:34:14,497 INFO L349 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2023-11-17 16:34:14,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 109 [2023-11-17 16:34:14,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-17 16:34:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-11-17 16:34:15,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159880562] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:15,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:15,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 36 [2023-11-17 16:34:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025133170] [2023-11-17 16:34:15,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:15,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:34:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:34:15,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1135, Unknown=1, NotChecked=68, Total=1332 [2023-11-17 16:34:15,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 440 [2023-11-17 16:34:15,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 1219 transitions, 22183 flow. Second operand has 37 states, 37 states have (on average 123.24324324324324) internal successors, (4560), 37 states have internal predecessors, (4560), 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 16:34:15,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:15,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 440 [2023-11-17 16:34:15,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:17,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:34:23,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:34:25,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:34:47,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]