/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:04:18,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:04:18,209 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 16:04:18,239 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:04:18,240 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:04:18,246 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:04:18,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:04:18,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:04:18,248 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:04:18,251 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:04:18,251 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:04:18,252 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:04:18,252 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:04:18,252 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:04:18,252 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:04:18,253 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:04:18,253 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:04:18,253 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:04:18,253 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:04:18,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:04:18,253 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:04:18,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:04:18,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:04:18,255 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:04:18,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:04:18,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:04:18,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:04:18,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:04:18,256 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:04:18,256 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:04:18,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:04:18,257 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:04:18,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:04:18,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:04:18,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:04:18,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:04:18,509 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:04:18,511 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:04:18,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-11-17 16:04:19,772 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:04:19,955 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:04:19,956 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-11-17 16:04:19,962 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a57eb57/5e1ae5e98b644f57bca57092cfcd24f9/FLAG638fff1ce [2023-11-17 16:04:19,973 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a57eb57/5e1ae5e98b644f57bca57092cfcd24f9 [2023-11-17 16:04:19,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:04:19,977 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:04:19,978 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:04:19,978 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:04:19,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:04:19,983 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:04:19" (1/1) ... [2023-11-17 16:04:19,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69a5d487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:19, skipping insertion in model container [2023-11-17 16:04:19,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:04:19" (1/1) ... [2023-11-17 16:04:20,006 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:04:20,218 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-17 16:04:20,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:04:20,248 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:04:20,273 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-17 16:04:20,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:04:20,294 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:04:20,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20 WrapperNode [2023-11-17 16:04:20,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:04:20,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:04:20,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:04:20,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:04:20,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (1/1) ... [2023-11-17 16:04:20,330 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (1/1) ... [2023-11-17 16:04:20,357 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 289 [2023-11-17 16:04:20,357 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:04:20,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:04:20,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:04:20,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:04:20,366 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (1/1) ... [2023-11-17 16:04:20,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (1/1) ... [2023-11-17 16:04:20,370 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (1/1) ... [2023-11-17 16:04:20,371 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (1/1) ... [2023-11-17 16:04:20,384 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (1/1) ... [2023-11-17 16:04:20,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (1/1) ... [2023-11-17 16:04:20,393 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (1/1) ... [2023-11-17 16:04:20,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (1/1) ... [2023-11-17 16:04:20,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:04:20,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:04:20,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:04:20,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:04:20,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (1/1) ... [2023-11-17 16:04:20,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:04:20,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:20,442 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 16:04:20,451 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 16:04:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:04:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:04:20,466 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:04:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:04:20,466 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:04:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:04:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:04:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:04:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:04:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:04:20,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:04:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:04:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:04:20,468 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 16:04:20,581 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:04:20,583 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:04:20,951 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:04:20,967 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:04:20,989 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 16:04:20,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:04:20 BoogieIcfgContainer [2023-11-17 16:04:20,991 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:04:20,995 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:04:20,995 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:04:20,999 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:04:20,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:04:19" (1/3) ... [2023-11-17 16:04:21,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62280536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:04:20, skipping insertion in model container [2023-11-17 16:04:21,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:20" (2/3) ... [2023-11-17 16:04:21,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62280536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:04:21, skipping insertion in model container [2023-11-17 16:04:21,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:04:20" (3/3) ... [2023-11-17 16:04:21,002 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-11-17 16:04:21,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:04:21,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:04:21,020 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:04:21,108 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:04:21,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 384 places, 405 transitions, 824 flow [2023-11-17 16:04:21,334 INFO L124 PetriNetUnfolderBase]: 28/403 cut-off events. [2023-11-17 16:04:21,334 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:04:21,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 403 events. 28/403 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 906 event pairs, 0 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 273. Up to 2 conditions per place. [2023-11-17 16:04:21,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 384 places, 405 transitions, 824 flow [2023-11-17 16:04:21,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 373 places, 394 transitions, 800 flow [2023-11-17 16:04:21,363 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:04:21,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 373 places, 394 transitions, 800 flow [2023-11-17 16:04:21,385 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 373 places, 394 transitions, 800 flow [2023-11-17 16:04:21,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 394 transitions, 800 flow [2023-11-17 16:04:21,473 INFO L124 PetriNetUnfolderBase]: 28/394 cut-off events. [2023-11-17 16:04:21,473 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:04:21,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 394 events. 28/394 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 904 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 273. Up to 2 conditions per place. [2023-11-17 16:04:21,496 INFO L119 LiptonReduction]: Number of co-enabled transitions 38252 [2023-11-17 16:04:31,450 INFO L134 LiptonReduction]: Checked pairs total: 32873 [2023-11-17 16:04:31,451 INFO L136 LiptonReduction]: Total number of compositions: 494 [2023-11-17 16:04:31,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:04:31,470 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;@40afe5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:04:31,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:04:31,475 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:04:31,476 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-17 16:04:31,476 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:04:31,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:31,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:31,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:31,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash 244853958, now seen corresponding path program 1 times [2023-11-17 16:04:31,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:31,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862359851] [2023-11-17 16:04:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:32,135 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 16:04:32,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:32,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862359851] [2023-11-17 16:04:32,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862359851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:32,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:32,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:04:32,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625274778] [2023-11-17 16:04:32,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:32,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:04:32,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:32,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:04:32,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:04:32,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 899 [2023-11-17 16:04:32,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 353.4) internal successors, (1767), 5 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:32,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 899 [2023-11-17 16:04:32,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:32,368 INFO L124 PetriNetUnfolderBase]: 140/229 cut-off events. [2023-11-17 16:04:32,368 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 16:04:32,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 229 events. 140/229 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 758 event pairs, 15 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 400. Up to 144 conditions per place. [2023-11-17 16:04:32,371 INFO L140 encePairwiseOnDemand]: 893/899 looper letters, 32 selfloop transitions, 10 changer transitions 1/45 dead transitions. [2023-11-17 16:04:32,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 45 transitions, 203 flow [2023-11-17 16:04:32,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:04:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:04:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1799 transitions. [2023-11-17 16:04:32,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002224694104561 [2023-11-17 16:04:32,392 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1799 transitions. [2023-11-17 16:04:32,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1799 transitions. [2023-11-17 16:04:32,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:32,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1799 transitions. [2023-11-17 16:04:32,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 359.8) internal successors, (1799), 5 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,420 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,422 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 5 states and 1799 transitions. [2023-11-17 16:04:32,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 45 transitions, 203 flow [2023-11-17 16:04:32,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 45 transitions, 185 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:04:32,428 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 103 flow [2023-11-17 16:04:32,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2023-11-17 16:04:32,433 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-17 16:04:32,433 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 103 flow [2023-11-17 16:04:32,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 353.4) internal successors, (1767), 5 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:32,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:32,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:04:32,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:32,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:32,436 INFO L85 PathProgramCache]: Analyzing trace with hash 611760097, now seen corresponding path program 1 times [2023-11-17 16:04:32,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:32,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126769829] [2023-11-17 16:04:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:32,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:32,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:32,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126769829] [2023-11-17 16:04:32,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126769829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:32,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:32,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:04:32,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437557205] [2023-11-17 16:04:32,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:32,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:04:32,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:04:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:04:32,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 899 [2023-11-17 16:04:32,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 352.25) internal successors, (1409), 4 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:32,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 899 [2023-11-17 16:04:32,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:32,673 INFO L124 PetriNetUnfolderBase]: 189/320 cut-off events. [2023-11-17 16:04:32,673 INFO L125 PetriNetUnfolderBase]: For 211/214 co-relation queries the response was YES. [2023-11-17 16:04:32,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 320 events. 189/320 cut-off events. For 211/214 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1180 event pairs, 80 based on Foata normal form. 16/320 useless extension candidates. Maximal degree in co-relation 491. Up to 166 conditions per place. [2023-11-17 16:04:32,675 INFO L140 encePairwiseOnDemand]: 894/899 looper letters, 35 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2023-11-17 16:04:32,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 244 flow [2023-11-17 16:04:32,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:04:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:04:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1425 transitions. [2023-11-17 16:04:32,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39627363737486093 [2023-11-17 16:04:32,680 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1425 transitions. [2023-11-17 16:04:32,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1425 transitions. [2023-11-17 16:04:32,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:32,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1425 transitions. [2023-11-17 16:04:32,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 356.25) internal successors, (1425), 4 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 899.0) internal successors, (4495), 5 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,692 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 899.0) internal successors, (4495), 5 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,692 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 103 flow. Second operand 4 states and 1425 transitions. [2023-11-17 16:04:32,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 43 transitions, 244 flow [2023-11-17 16:04:32,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 242 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 16:04:32,696 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 157 flow [2023-11-17 16:04:32,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2023-11-17 16:04:32,697 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2023-11-17 16:04:32,697 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 157 flow [2023-11-17 16:04:32,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 352.25) internal successors, (1409), 4 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:32,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:32,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:04:32,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:32,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:32,700 INFO L85 PathProgramCache]: Analyzing trace with hash 482903667, now seen corresponding path program 1 times [2023-11-17 16:04:32,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:32,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833624429] [2023-11-17 16:04:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:32,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:32,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:32,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833624429] [2023-11-17 16:04:32,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833624429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:32,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:32,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:04:32,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119380383] [2023-11-17 16:04:32,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:32,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:04:32,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:32,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:04:32,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:04:32,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 899 [2023-11-17 16:04:32,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 157 flow. Second operand has 4 states, 4 states have (on average 352.5) internal successors, (1410), 4 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:32,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 899 [2023-11-17 16:04:32,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:32,894 INFO L124 PetriNetUnfolderBase]: 143/249 cut-off events. [2023-11-17 16:04:32,894 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2023-11-17 16:04:32,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 249 events. 143/249 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 877 event pairs, 55 based on Foata normal form. 6/255 useless extension candidates. Maximal degree in co-relation 747. Up to 141 conditions per place. [2023-11-17 16:04:32,896 INFO L140 encePairwiseOnDemand]: 894/899 looper letters, 30 selfloop transitions, 4 changer transitions 4/40 dead transitions. [2023-11-17 16:04:32,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 276 flow [2023-11-17 16:04:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:04:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:04:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1422 transitions. [2023-11-17 16:04:32,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39543937708565075 [2023-11-17 16:04:32,900 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1422 transitions. [2023-11-17 16:04:32,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1422 transitions. [2023-11-17 16:04:32,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:32,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1422 transitions. [2023-11-17 16:04:32,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 355.5) internal successors, (1422), 4 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 899.0) internal successors, (4495), 5 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,911 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 899.0) internal successors, (4495), 5 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,912 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 157 flow. Second operand 4 states and 1422 transitions. [2023-11-17 16:04:32,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 276 flow [2023-11-17 16:04:32,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 272 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 16:04:32,918 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 143 flow [2023-11-17 16:04:32,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-11-17 16:04:32,920 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-11-17 16:04:32,920 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 143 flow [2023-11-17 16:04:32,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 352.5) internal successors, (1410), 4 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:32,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:32,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:04:32,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:32,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:32,923 INFO L85 PathProgramCache]: Analyzing trace with hash -778406271, now seen corresponding path program 1 times [2023-11-17 16:04:32,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:32,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224804106] [2023-11-17 16:04:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:32,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:33,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:33,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224804106] [2023-11-17 16:04:33,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224804106] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:33,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773983658] [2023-11-17 16:04:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:33,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:33,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:33,025 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 16:04:33,057 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 16:04:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:33,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:04:33,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:33,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:33,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773983658] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:33,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:04:33,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-11-17 16:04:33,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175217531] [2023-11-17 16:04:33,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:33,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:04:33,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:33,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:04:33,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:04:33,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 899 [2023-11-17 16:04:33,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 351.8) internal successors, (1759), 5 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:33,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 899 [2023-11-17 16:04:33,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:33,340 INFO L124 PetriNetUnfolderBase]: 115/189 cut-off events. [2023-11-17 16:04:33,340 INFO L125 PetriNetUnfolderBase]: For 410/414 co-relation queries the response was YES. [2023-11-17 16:04:33,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 189 events. 115/189 cut-off events. For 410/414 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 561 event pairs, 29 based on Foata normal form. 16/205 useless extension candidates. Maximal degree in co-relation 696. Up to 97 conditions per place. [2023-11-17 16:04:33,342 INFO L140 encePairwiseOnDemand]: 893/899 looper letters, 26 selfloop transitions, 8 changer transitions 0/36 dead transitions. [2023-11-17 16:04:33,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 254 flow [2023-11-17 16:04:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:04:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:04:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1769 transitions. [2023-11-17 16:04:33,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2023-11-17 16:04:33,347 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1769 transitions. [2023-11-17 16:04:33,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1769 transitions. [2023-11-17 16:04:33,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:33,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1769 transitions. [2023-11-17 16:04:33,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 353.8) internal successors, (1769), 5 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,361 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,361 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 143 flow. Second operand 5 states and 1769 transitions. [2023-11-17 16:04:33,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 254 flow [2023-11-17 16:04:33,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 208 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-17 16:04:33,364 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 144 flow [2023-11-17 16:04:33,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-11-17 16:04:33,365 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2023-11-17 16:04:33,365 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 144 flow [2023-11-17 16:04:33,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 351.8) internal successors, (1759), 5 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:33,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:33,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:33,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:33,573 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:33,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:33,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1029740687, now seen corresponding path program 1 times [2023-11-17 16:04:33,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:33,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609711830] [2023-11-17 16:04:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:33,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:33,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:33,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609711830] [2023-11-17 16:04:33,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609711830] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:33,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747664576] [2023-11-17 16:04:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:33,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:33,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:33,653 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 16:04:33,658 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 16:04:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:33,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:04:33,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:33,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:33,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747664576] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:33,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:04:33,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-11-17 16:04:33,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997327614] [2023-11-17 16:04:33,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:33,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:04:33,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:33,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:04:33,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:04:33,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 899 [2023-11-17 16:04:33,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:33,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 899 [2023-11-17 16:04:33,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:33,951 INFO L124 PetriNetUnfolderBase]: 93/159 cut-off events. [2023-11-17 16:04:33,951 INFO L125 PetriNetUnfolderBase]: For 151/154 co-relation queries the response was YES. [2023-11-17 16:04:33,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 159 events. 93/159 cut-off events. For 151/154 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 411 event pairs, 18 based on Foata normal form. 12/167 useless extension candidates. Maximal degree in co-relation 559. Up to 98 conditions per place. [2023-11-17 16:04:33,952 INFO L140 encePairwiseOnDemand]: 894/899 looper letters, 32 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-11-17 16:04:33,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 276 flow [2023-11-17 16:04:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:04:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:04:33,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1770 transitions. [2023-11-17 16:04:33,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39377085650723026 [2023-11-17 16:04:33,957 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1770 transitions. [2023-11-17 16:04:33,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1770 transitions. [2023-11-17 16:04:33,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:33,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1770 transitions. [2023-11-17 16:04:33,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 354.0) internal successors, (1770), 5 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,970 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 899.0) internal successors, (5394), 6 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,971 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 144 flow. Second operand 5 states and 1770 transitions. [2023-11-17 16:04:33,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 276 flow [2023-11-17 16:04:33,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 264 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 16:04:33,975 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 168 flow [2023-11-17 16:04:33,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-17 16:04:33,977 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-11-17 16:04:33,977 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 168 flow [2023-11-17 16:04:33,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:33,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:33,984 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 16:04:34,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:34,183 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:34,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:34,184 INFO L85 PathProgramCache]: Analyzing trace with hash -710759572, now seen corresponding path program 1 times [2023-11-17 16:04:34,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:34,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449807924] [2023-11-17 16:04:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:34,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:36,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:36,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449807924] [2023-11-17 16:04:36,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449807924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:36,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105644711] [2023-11-17 16:04:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:36,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:36,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:36,097 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 16:04:36,124 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 16:04:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:36,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:04:36,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:36,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 97 treesize of output 61 [2023-11-17 16:04:36,548 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 16:04:36,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:36,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:36,800 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 143 treesize of output 111 [2023-11-17 16:04:37,014 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 16:04:37,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105644711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:37,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:37,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-11-17 16:04:37,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581904537] [2023-11-17 16:04:37,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:37,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:04:37,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:37,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:04:37,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:04:37,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 899 [2023-11-17 16:04:37,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 168 flow. Second operand has 18 states, 18 states have (on average 308.44444444444446) internal successors, (5552), 18 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:37,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:37,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 899 [2023-11-17 16:04:37,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:37,303 INFO L124 PetriNetUnfolderBase]: 125/218 cut-off events. [2023-11-17 16:04:37,304 INFO L125 PetriNetUnfolderBase]: For 230/232 co-relation queries the response was YES. [2023-11-17 16:04:37,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 218 events. 125/218 cut-off events. For 230/232 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 679 event pairs, 3 based on Foata normal form. 3/217 useless extension candidates. Maximal degree in co-relation 838. Up to 135 conditions per place. [2023-11-17 16:04:37,306 INFO L140 encePairwiseOnDemand]: 890/899 looper letters, 40 selfloop transitions, 22 changer transitions 4/68 dead transitions. [2023-11-17 16:04:37,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 68 transitions, 458 flow [2023-11-17 16:04:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:04:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:04:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3117 transitions. [2023-11-17 16:04:37,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34671857619577306 [2023-11-17 16:04:37,314 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3117 transitions. [2023-11-17 16:04:37,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3117 transitions. [2023-11-17 16:04:37,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:37,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3117 transitions. [2023-11-17 16:04:37,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 311.7) internal successors, (3117), 10 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:37,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:37,336 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:37,336 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 168 flow. Second operand 10 states and 3117 transitions. [2023-11-17 16:04:37,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 68 transitions, 458 flow [2023-11-17 16:04:37,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 68 transitions, 455 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:04:37,338 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 333 flow [2023-11-17 16:04:37,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=333, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-11-17 16:04:37,339 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-11-17 16:04:37,339 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 333 flow [2023-11-17 16:04:37,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 308.44444444444446) internal successors, (5552), 18 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:37,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:37,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:37,352 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 16:04:37,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:37,553 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:37,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:37,553 INFO L85 PathProgramCache]: Analyzing trace with hash 125954280, now seen corresponding path program 2 times [2023-11-17 16:04:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:37,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494183993] [2023-11-17 16:04:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:37,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:38,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494183993] [2023-11-17 16:04:38,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494183993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:38,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068324948] [2023-11-17 16:04:38,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:04:38,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:38,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:38,501 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 16:04:38,521 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 16:04:38,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:04:38,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:38,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:04:38,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:38,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 97 treesize of output 61 [2023-11-17 16:04:38,910 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 16:04:38,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:39,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:39,125 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 143 treesize of output 111 [2023-11-17 16:04:39,363 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 16:04:39,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068324948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:39,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:39,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-11-17 16:04:39,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655613606] [2023-11-17 16:04:39,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:39,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:04:39,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:39,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:04:39,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:04:39,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 899 [2023-11-17 16:04:39,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 333 flow. Second operand has 18 states, 18 states have (on average 308.3333333333333) internal successors, (5550), 18 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:39,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 899 [2023-11-17 16:04:39,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:39,574 INFO L124 PetriNetUnfolderBase]: 137/238 cut-off events. [2023-11-17 16:04:39,574 INFO L125 PetriNetUnfolderBase]: For 520/520 co-relation queries the response was YES. [2023-11-17 16:04:39,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 238 events. 137/238 cut-off events. For 520/520 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 771 event pairs, 7 based on Foata normal form. 1/234 useless extension candidates. Maximal degree in co-relation 1119. Up to 162 conditions per place. [2023-11-17 16:04:39,577 INFO L140 encePairwiseOnDemand]: 890/899 looper letters, 39 selfloop transitions, 24 changer transitions 4/69 dead transitions. [2023-11-17 16:04:39,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 589 flow [2023-11-17 16:04:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:04:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:04:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3116 transitions. [2023-11-17 16:04:39,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34660734149054506 [2023-11-17 16:04:39,587 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3116 transitions. [2023-11-17 16:04:39,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3116 transitions. [2023-11-17 16:04:39,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:39,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3116 transitions. [2023-11-17 16:04:39,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 311.6) internal successors, (3116), 10 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,609 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,609 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 333 flow. Second operand 10 states and 3116 transitions. [2023-11-17 16:04:39,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 589 flow [2023-11-17 16:04:39,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 69 transitions, 545 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-11-17 16:04:39,613 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 417 flow [2023-11-17 16:04:39,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=417, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-11-17 16:04:39,615 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 34 predicate places. [2023-11-17 16:04:39,615 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 417 flow [2023-11-17 16:04:39,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 308.3333333333333) internal successors, (5550), 18 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:39,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:39,629 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 16:04:39,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:39,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:39,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash 264482430, now seen corresponding path program 3 times [2023-11-17 16:04:39,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:39,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850019288] [2023-11-17 16:04:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:39,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:40,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:40,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850019288] [2023-11-17 16:04:40,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850019288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:40,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015329541] [2023-11-17 16:04:40,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:04:40,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:40,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:40,536 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 16:04:40,557 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 16:04:40,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:04:40,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:40,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:04:40,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:40,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:04:40,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:04:40,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:04:40,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 97 treesize of output 61 [2023-11-17 16:04:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:41,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:41,597 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 16:04:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015329541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:41,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:41,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-17 16:04:41,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106307799] [2023-11-17 16:04:41,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:41,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:04:41,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:41,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:04:41,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=331, Unknown=3, NotChecked=0, Total=420 [2023-11-17 16:04:41,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 899 [2023-11-17 16:04:41,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 417 flow. Second operand has 21 states, 21 states have (on average 308.0) internal successors, (6468), 21 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:41,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:41,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 899 [2023-11-17 16:04:41,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:41,901 INFO L124 PetriNetUnfolderBase]: 142/248 cut-off events. [2023-11-17 16:04:41,902 INFO L125 PetriNetUnfolderBase]: For 663/663 co-relation queries the response was YES. [2023-11-17 16:04:41,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 248 events. 142/248 cut-off events. For 663/663 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 811 event pairs, 5 based on Foata normal form. 1/244 useless extension candidates. Maximal degree in co-relation 1208. Up to 170 conditions per place. [2023-11-17 16:04:41,904 INFO L140 encePairwiseOnDemand]: 890/899 looper letters, 42 selfloop transitions, 24 changer transitions 4/72 dead transitions. [2023-11-17 16:04:41,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 644 flow [2023-11-17 16:04:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:04:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:04:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3117 transitions. [2023-11-17 16:04:41,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34671857619577306 [2023-11-17 16:04:41,912 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3117 transitions. [2023-11-17 16:04:41,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3117 transitions. [2023-11-17 16:04:41,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:41,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3117 transitions. [2023-11-17 16:04:41,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 311.7) internal successors, (3117), 10 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:41,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:41,931 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:41,931 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 417 flow. Second operand 10 states and 3117 transitions. [2023-11-17 16:04:41,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 644 flow [2023-11-17 16:04:41,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 579 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-17 16:04:41,936 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 425 flow [2023-11-17 16:04:41,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=425, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-11-17 16:04:41,938 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2023-11-17 16:04:41,938 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 425 flow [2023-11-17 16:04:41,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 308.0) internal successors, (6468), 21 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:41,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:41,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:41,948 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 16:04:42,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:42,146 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:42,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1830621128, now seen corresponding path program 4 times [2023-11-17 16:04:42,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:42,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000052813] [2023-11-17 16:04:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:42,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:42,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:42,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000052813] [2023-11-17 16:04:42,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000052813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:42,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166261670] [2023-11-17 16:04:42,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:04:42,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:42,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:42,898 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 16:04:42,918 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 16:04:43,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:04:43,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:43,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 16:04:43,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:43,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 67 treesize of output 47 [2023-11-17 16:04:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:43,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:43,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:43,702 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 258 treesize of output 170 [2023-11-17 16:04:44,336 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 16:04:44,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166261670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:44,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:44,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-11-17 16:04:44,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649463008] [2023-11-17 16:04:44,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:44,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:04:44,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:44,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:04:44,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:04:44,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 899 [2023-11-17 16:04:44,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 425 flow. Second operand has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:44,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:44,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 899 [2023-11-17 16:04:44,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:45,591 INFO L124 PetriNetUnfolderBase]: 258/462 cut-off events. [2023-11-17 16:04:45,591 INFO L125 PetriNetUnfolderBase]: For 1350/1350 co-relation queries the response was YES. [2023-11-17 16:04:45,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2377 conditions, 462 events. 258/462 cut-off events. For 1350/1350 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1850 event pairs, 3 based on Foata normal form. 7/462 useless extension candidates. Maximal degree in co-relation 1999. Up to 149 conditions per place. [2023-11-17 16:04:45,596 INFO L140 encePairwiseOnDemand]: 889/899 looper letters, 73 selfloop transitions, 96 changer transitions 11/182 dead transitions. [2023-11-17 16:04:45,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 182 transitions, 1672 flow [2023-11-17 16:04:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:04:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:04:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 8515 transitions. [2023-11-17 16:04:45,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3382726839345304 [2023-11-17 16:04:45,616 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 8515 transitions. [2023-11-17 16:04:45,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 8515 transitions. [2023-11-17 16:04:45,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:45,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 8515 transitions. [2023-11-17 16:04:45,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 304.10714285714283) internal successors, (8515), 28 states have internal predecessors, (8515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 899.0) internal successors, (26071), 29 states have internal predecessors, (26071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,710 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 899.0) internal successors, (26071), 29 states have internal predecessors, (26071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,711 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 425 flow. Second operand 28 states and 8515 transitions. [2023-11-17 16:04:45,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 182 transitions, 1672 flow [2023-11-17 16:04:45,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 182 transitions, 1499 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-11-17 16:04:45,721 INFO L231 Difference]: Finished difference. Result has 80 places, 122 transitions, 1179 flow [2023-11-17 16:04:45,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1179, PETRI_PLACES=80, PETRI_TRANSITIONS=122} [2023-11-17 16:04:45,722 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 58 predicate places. [2023-11-17 16:04:45,722 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 122 transitions, 1179 flow [2023-11-17 16:04:45,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:45,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:45,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:45,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:45,930 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:45,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:45,930 INFO L85 PathProgramCache]: Analyzing trace with hash 209764836, now seen corresponding path program 5 times [2023-11-17 16:04:45,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:45,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309129190] [2023-11-17 16:04:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:45,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:46,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:46,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309129190] [2023-11-17 16:04:46,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309129190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:46,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608655844] [2023-11-17 16:04:46,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:04:46,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:46,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:46,571 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 16:04:46,593 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 16:04:46,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:04:46,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:46,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:04:46,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:46,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 67 treesize of output 47 [2023-11-17 16:04:46,939 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 16:04:46,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:47,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:47,086 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 248 treesize of output 160 [2023-11-17 16:04:47,321 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 16:04:47,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608655844] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:47,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:47,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-11-17 16:04:47,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049065940] [2023-11-17 16:04:47,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:47,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:04:47,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:47,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:04:47,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:04:47,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 899 [2023-11-17 16:04:47,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 122 transitions, 1179 flow. Second operand has 18 states, 18 states have (on average 308.3333333333333) internal successors, (5550), 18 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:47,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:47,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 899 [2023-11-17 16:04:47,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:47,597 INFO L124 PetriNetUnfolderBase]: 252/459 cut-off events. [2023-11-17 16:04:47,597 INFO L125 PetriNetUnfolderBase]: For 1443/1443 co-relation queries the response was YES. [2023-11-17 16:04:47,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2505 conditions, 459 events. 252/459 cut-off events. For 1443/1443 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1886 event pairs, 17 based on Foata normal form. 1/452 useless extension candidates. Maximal degree in co-relation 2068. Up to 344 conditions per place. [2023-11-17 16:04:47,602 INFO L140 encePairwiseOnDemand]: 891/899 looper letters, 96 selfloop transitions, 36 changer transitions 4/138 dead transitions. [2023-11-17 16:04:47,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 138 transitions, 1535 flow [2023-11-17 16:04:47,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2803 transitions. [2023-11-17 16:04:47,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346434309726857 [2023-11-17 16:04:47,610 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2803 transitions. [2023-11-17 16:04:47,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2803 transitions. [2023-11-17 16:04:47,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:47,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2803 transitions. [2023-11-17 16:04:47,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 311.44444444444446) internal successors, (2803), 9 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:47,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:47,624 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:47,624 INFO L175 Difference]: Start difference. First operand has 80 places, 122 transitions, 1179 flow. Second operand 9 states and 2803 transitions. [2023-11-17 16:04:47,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 138 transitions, 1535 flow [2023-11-17 16:04:47,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 138 transitions, 1237 flow, removed 105 selfloop flow, removed 8 redundant places. [2023-11-17 16:04:47,637 INFO L231 Difference]: Finished difference. Result has 80 places, 124 transitions, 1011 flow [2023-11-17 16:04:47,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1011, PETRI_PLACES=80, PETRI_TRANSITIONS=124} [2023-11-17 16:04:47,638 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 58 predicate places. [2023-11-17 16:04:47,638 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 124 transitions, 1011 flow [2023-11-17 16:04:47,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 308.3333333333333) internal successors, (5550), 18 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:47,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:47,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:47,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:47,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:47,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:47,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:47,849 INFO L85 PathProgramCache]: Analyzing trace with hash -79803684, now seen corresponding path program 6 times [2023-11-17 16:04:47,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:47,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163326667] [2023-11-17 16:04:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:47,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:48,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:48,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163326667] [2023-11-17 16:04:48,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163326667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:48,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400018625] [2023-11-17 16:04:48,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:04:48,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:48,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:48,433 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 16:04:48,452 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 16:04:48,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:04:48,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:48,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:04:48,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:48,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 67 treesize of output 47 [2023-11-17 16:04:48,763 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 16:04:48,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:48,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:48,915 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 248 treesize of output 160 [2023-11-17 16:04:49,153 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 16:04:49,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400018625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:49,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:49,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-11-17 16:04:49,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960321868] [2023-11-17 16:04:49,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:49,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:04:49,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:04:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:04:49,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 899 [2023-11-17 16:04:49,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 124 transitions, 1011 flow. Second operand has 18 states, 18 states have (on average 308.3333333333333) internal successors, (5550), 18 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:49,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:49,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 899 [2023-11-17 16:04:49,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:49,470 INFO L124 PetriNetUnfolderBase]: 257/468 cut-off events. [2023-11-17 16:04:49,470 INFO L125 PetriNetUnfolderBase]: For 911/911 co-relation queries the response was YES. [2023-11-17 16:04:49,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 468 events. 257/468 cut-off events. For 911/911 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1917 event pairs, 16 based on Foata normal form. 1/463 useless extension candidates. Maximal degree in co-relation 2017. Up to 326 conditions per place. [2023-11-17 16:04:49,475 INFO L140 encePairwiseOnDemand]: 891/899 looper letters, 81 selfloop transitions, 54 changer transitions 5/142 dead transitions. [2023-11-17 16:04:49,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 142 transitions, 1361 flow [2023-11-17 16:04:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:04:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:04:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3116 transitions. [2023-11-17 16:04:49,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34660734149054506 [2023-11-17 16:04:49,482 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3116 transitions. [2023-11-17 16:04:49,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3116 transitions. [2023-11-17 16:04:49,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:49,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3116 transitions. [2023-11-17 16:04:49,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 311.6) internal successors, (3116), 10 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:49,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:49,502 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:49,502 INFO L175 Difference]: Start difference. First operand has 80 places, 124 transitions, 1011 flow. Second operand 10 states and 3116 transitions. [2023-11-17 16:04:49,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 142 transitions, 1361 flow [2023-11-17 16:04:49,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 142 transitions, 1251 flow, removed 11 selfloop flow, removed 8 redundant places. [2023-11-17 16:04:49,514 INFO L231 Difference]: Finished difference. Result has 83 places, 124 transitions, 1048 flow [2023-11-17 16:04:49,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1048, PETRI_PLACES=83, PETRI_TRANSITIONS=124} [2023-11-17 16:04:49,515 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 61 predicate places. [2023-11-17 16:04:49,515 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 124 transitions, 1048 flow [2023-11-17 16:04:49,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 308.3333333333333) internal successors, (5550), 18 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:49,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:49,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:49,524 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 16:04:49,722 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,SelfDestructingSolverStorable10 [2023-11-17 16:04:49,722 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:49,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1121404778, now seen corresponding path program 7 times [2023-11-17 16:04:49,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:49,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516183081] [2023-11-17 16:04:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:49,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:50,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:50,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516183081] [2023-11-17 16:04:50,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516183081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:50,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120225271] [2023-11-17 16:04:50,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:04:50,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:50,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:50,610 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 16:04:50,616 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 16:04:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:50,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 16:04:50,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:50,714 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 26 treesize of output 24 [2023-11-17 16:04:50,884 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 16 treesize of output 11 [2023-11-17 16:04:50,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 97 treesize of output 61 [2023-11-17 16:04:51,003 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 16:04:51,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:51,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:51,258 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 207 treesize of output 175 [2023-11-17 16:04:51,270 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 50 treesize of output 32 [2023-11-17 16:04:51,569 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 16:04:51,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120225271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:51,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:51,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-11-17 16:04:51,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986214394] [2023-11-17 16:04:51,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:51,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:04:51,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:04:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=380, Unknown=6, NotChecked=0, Total=462 [2023-11-17 16:04:51,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 899 [2023-11-17 16:04:51,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 124 transitions, 1048 flow. Second operand has 22 states, 22 states have (on average 307.90909090909093) internal successors, (6774), 22 states have internal predecessors, (6774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:51,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 899 [2023-11-17 16:04:51,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:51,861 INFO L124 PetriNetUnfolderBase]: 259/478 cut-off events. [2023-11-17 16:04:51,861 INFO L125 PetriNetUnfolderBase]: For 946/946 co-relation queries the response was YES. [2023-11-17 16:04:51,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2242 conditions, 478 events. 259/478 cut-off events. For 946/946 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2012 event pairs, 13 based on Foata normal form. 1/477 useless extension candidates. Maximal degree in co-relation 2105. Up to 328 conditions per place. [2023-11-17 16:04:51,865 INFO L140 encePairwiseOnDemand]: 891/899 looper letters, 92 selfloop transitions, 47 changer transitions 4/145 dead transitions. [2023-11-17 16:04:51,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 145 transitions, 1418 flow [2023-11-17 16:04:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2805 transitions. [2023-11-17 16:04:51,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3466814979606971 [2023-11-17 16:04:51,870 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2805 transitions. [2023-11-17 16:04:51,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2805 transitions. [2023-11-17 16:04:51,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:51,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2805 transitions. [2023-11-17 16:04:51,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 311.6666666666667) internal successors, (2805), 9 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,887 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,887 INFO L175 Difference]: Start difference. First operand has 83 places, 124 transitions, 1048 flow. Second operand 9 states and 2805 transitions. [2023-11-17 16:04:51,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 145 transitions, 1418 flow [2023-11-17 16:04:51,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 145 transitions, 1302 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-17 16:04:51,899 INFO L231 Difference]: Finished difference. Result has 86 places, 126 transitions, 1090 flow [2023-11-17 16:04:51,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1090, PETRI_PLACES=86, PETRI_TRANSITIONS=126} [2023-11-17 16:04:51,901 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 64 predicate places. [2023-11-17 16:04:51,901 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 126 transitions, 1090 flow [2023-11-17 16:04:51,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 307.90909090909093) internal successors, (6774), 22 states have internal predecessors, (6774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:51,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:51,908 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 16:04:52,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:52,107 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:52,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:52,107 INFO L85 PathProgramCache]: Analyzing trace with hash 496122722, now seen corresponding path program 8 times [2023-11-17 16:04:52,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:52,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497890217] [2023-11-17 16:04:52,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:52,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:52,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:52,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497890217] [2023-11-17 16:04:52,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497890217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:52,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116353139] [2023-11-17 16:04:52,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:04:52,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:52,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:52,674 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 16:04:52,698 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 16:04:52,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:04:52,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:52,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:04:52,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:52,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:04:52,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:04:52,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:04:52,938 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 16 treesize of output 11 [2023-11-17 16:04:52,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 97 treesize of output 61 [2023-11-17 16:04:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:53,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:53,221 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_280 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_280) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (= (+ c_~bag2~0 c_~sum2~0 .cse0) (+ c_~bag1~0 c_~sum1~0)) (< (+ c_~bag2~0 .cse0 2147483648) 0) (< 2147483647 (+ c_~bag2~0 .cse0))))) is different from false [2023-11-17 16:04:53,511 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_280 (Array Int Int)) (v_ArrVal_279 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_279))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_280) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< (+ .cse0 2147483648) 0) (= .cse0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (< 2147483647 .cse0))))) is different from false [2023-11-17 16:04:53,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:53,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 61 [2023-11-17 16:04:53,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 488 treesize of output 440 [2023-11-17 16:04:53,532 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 52 [2023-11-17 16:04:53,536 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 9 treesize of output 7 [2023-11-17 16:04:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-17 16:04:53,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116353139] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:53,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:53,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-17 16:04:53,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535106723] [2023-11-17 16:04:53,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:53,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:04:53,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:53,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:04:53,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=349, Unknown=2, NotChecked=78, Total=506 [2023-11-17 16:04:53,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 899 [2023-11-17 16:04:53,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 126 transitions, 1090 flow. Second operand has 23 states, 23 states have (on average 307.7826086956522) internal successors, (7079), 23 states have internal predecessors, (7079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:53,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 899 [2023-11-17 16:04:53,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:53,881 INFO L124 PetriNetUnfolderBase]: 262/486 cut-off events. [2023-11-17 16:04:53,881 INFO L125 PetriNetUnfolderBase]: For 1180/1180 co-relation queries the response was YES. [2023-11-17 16:04:53,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2317 conditions, 486 events. 262/486 cut-off events. For 1180/1180 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2063 event pairs, 17 based on Foata normal form. 1/485 useless extension candidates. Maximal degree in co-relation 2173. Up to 359 conditions per place. [2023-11-17 16:04:53,886 INFO L140 encePairwiseOnDemand]: 891/899 looper letters, 92 selfloop transitions, 45 changer transitions 4/143 dead transitions. [2023-11-17 16:04:53,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 143 transitions, 1444 flow [2023-11-17 16:04:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2804 transitions. [2023-11-17 16:04:53,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34655790384377705 [2023-11-17 16:04:53,890 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2804 transitions. [2023-11-17 16:04:53,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2804 transitions. [2023-11-17 16:04:53,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:53,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2804 transitions. [2023-11-17 16:04:53,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 311.55555555555554) internal successors, (2804), 9 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,900 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,900 INFO L175 Difference]: Start difference. First operand has 86 places, 126 transitions, 1090 flow. Second operand 9 states and 2804 transitions. [2023-11-17 16:04:53,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 143 transitions, 1444 flow [2023-11-17 16:04:53,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 143 transitions, 1316 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-17 16:04:53,909 INFO L231 Difference]: Finished difference. Result has 88 places, 127 transitions, 1081 flow [2023-11-17 16:04:53,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1081, PETRI_PLACES=88, PETRI_TRANSITIONS=127} [2023-11-17 16:04:53,910 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 66 predicate places. [2023-11-17 16:04:53,910 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 127 transitions, 1081 flow [2023-11-17 16:04:53,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 307.7826086956522) internal successors, (7079), 23 states have internal predecessors, (7079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:53,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:53,919 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 16:04:54,119 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,SelfDestructingSolverStorable12 [2023-11-17 16:04:54,120 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:54,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:54,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2147128712, now seen corresponding path program 9 times [2023-11-17 16:04:54,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:54,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353133003] [2023-11-17 16:04:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:54,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:54,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:54,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353133003] [2023-11-17 16:04:54,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353133003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:54,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259787211] [2023-11-17 16:04:54,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:04:54,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:54,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:54,673 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 16:04:54,677 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 16:04:54,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:04:54,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:54,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 16:04:54,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:54,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:04:54,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:04:55,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:04:55,008 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 16 treesize of output 11 [2023-11-17 16:04:55,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 97 treesize of output 61 [2023-11-17 16:04:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:55,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:55,564 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_308 (Array Int Int)) (v_ArrVal_307 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_307))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_308) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (= .cse0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (< (+ .cse0 2147483648) 0) (< 2147483647 .cse0))))) is different from false [2023-11-17 16:04:55,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:55,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 61 [2023-11-17 16:04:55,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 488 treesize of output 440 [2023-11-17 16:04:55,586 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 52 [2023-11-17 16:04:55,589 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 9 treesize of output 7 [2023-11-17 16:04:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-17 16:04:55,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259787211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:55,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:55,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-17 16:04:55,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232985741] [2023-11-17 16:04:55,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:55,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:04:55,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:04:55,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=377, Unknown=5, NotChecked=40, Total=506 [2023-11-17 16:04:55,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 899 [2023-11-17 16:04:55,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 127 transitions, 1081 flow. Second operand has 23 states, 23 states have (on average 307.82608695652175) internal successors, (7080), 23 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:55,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:55,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 899 [2023-11-17 16:04:55,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:55,882 INFO L124 PetriNetUnfolderBase]: 264/495 cut-off events. [2023-11-17 16:04:55,883 INFO L125 PetriNetUnfolderBase]: For 1109/1109 co-relation queries the response was YES. [2023-11-17 16:04:55,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 495 events. 264/495 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2153 event pairs, 18 based on Foata normal form. 1/494 useless extension candidates. Maximal degree in co-relation 2156. Up to 346 conditions per place. [2023-11-17 16:04:55,887 INFO L140 encePairwiseOnDemand]: 891/899 looper letters, 82 selfloop transitions, 58 changer transitions 4/146 dead transitions. [2023-11-17 16:04:55,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 146 transitions, 1464 flow [2023-11-17 16:04:55,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:04:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:04:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3115 transitions. [2023-11-17 16:04:55,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346496106785317 [2023-11-17 16:04:55,891 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3115 transitions. [2023-11-17 16:04:55,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3115 transitions. [2023-11-17 16:04:55,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:55,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3115 transitions. [2023-11-17 16:04:55,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 311.5) internal successors, (3115), 10 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:55,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:55,902 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 899.0) internal successors, (9889), 11 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:55,903 INFO L175 Difference]: Start difference. First operand has 88 places, 127 transitions, 1081 flow. Second operand 10 states and 3115 transitions. [2023-11-17 16:04:55,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 146 transitions, 1464 flow [2023-11-17 16:04:55,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 146 transitions, 1357 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-11-17 16:04:55,911 INFO L231 Difference]: Finished difference. Result has 91 places, 130 transitions, 1154 flow [2023-11-17 16:04:55,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1154, PETRI_PLACES=91, PETRI_TRANSITIONS=130} [2023-11-17 16:04:55,912 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 69 predicate places. [2023-11-17 16:04:55,912 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 130 transitions, 1154 flow [2023-11-17 16:04:55,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 307.82608695652175) internal successors, (7080), 23 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:55,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:55,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:55,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:56,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 16:04:56,120 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:56,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:56,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1028319555, now seen corresponding path program 10 times [2023-11-17 16:04:56,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:56,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902031354] [2023-11-17 16:04:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:56,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:56,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:56,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902031354] [2023-11-17 16:04:56,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902031354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:56,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399994532] [2023-11-17 16:04:56,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:04:56,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:56,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:56,248 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:56,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:04:56,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:04:56,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:56,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:04:56,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:56,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:56,664 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 16:04:56,664 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 267 treesize of output 163 [2023-11-17 16:04:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399994532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:56,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:56,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-17 16:04:56,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329349775] [2023-11-17 16:04:56,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:56,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:04:56,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:56,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:04:56,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:04:56,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 899 [2023-11-17 16:04:56,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 130 transitions, 1154 flow. Second operand has 13 states, 13 states have (on average 323.7692307692308) internal successors, (4209), 13 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:56,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:56,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 899 [2023-11-17 16:04:56,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:57,013 INFO L124 PetriNetUnfolderBase]: 332/669 cut-off events. [2023-11-17 16:04:57,013 INFO L125 PetriNetUnfolderBase]: For 1825/1825 co-relation queries the response was YES. [2023-11-17 16:04:57,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3250 conditions, 669 events. 332/669 cut-off events. For 1825/1825 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3455 event pairs, 69 based on Foata normal form. 50/718 useless extension candidates. Maximal degree in co-relation 3142. Up to 252 conditions per place. [2023-11-17 16:04:57,020 INFO L140 encePairwiseOnDemand]: 894/899 looper letters, 148 selfloop transitions, 37 changer transitions 8/195 dead transitions. [2023-11-17 16:04:57,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 195 transitions, 2125 flow [2023-11-17 16:04:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:04:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:04:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2619 transitions. [2023-11-17 16:04:57,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36415461624026696 [2023-11-17 16:04:57,024 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2619 transitions. [2023-11-17 16:04:57,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2619 transitions. [2023-11-17 16:04:57,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:57,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2619 transitions. [2023-11-17 16:04:57,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 327.375) internal successors, (2619), 8 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:57,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 899.0) internal successors, (8091), 9 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:57,033 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 899.0) internal successors, (8091), 9 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:57,033 INFO L175 Difference]: Start difference. First operand has 91 places, 130 transitions, 1154 flow. Second operand 8 states and 2619 transitions. [2023-11-17 16:04:57,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 195 transitions, 2125 flow [2023-11-17 16:04:57,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 195 transitions, 1945 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-11-17 16:04:57,046 INFO L231 Difference]: Finished difference. Result has 91 places, 137 transitions, 1263 flow [2023-11-17 16:04:57,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1263, PETRI_PLACES=91, PETRI_TRANSITIONS=137} [2023-11-17 16:04:57,047 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 69 predicate places. [2023-11-17 16:04:57,048 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 137 transitions, 1263 flow [2023-11-17 16:04:57,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 323.7692307692308) internal successors, (4209), 13 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:57,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:57,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:57,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:57,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 16:04:57,255 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:57,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash 567563341, now seen corresponding path program 11 times [2023-11-17 16:04:57,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:57,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420734401] [2023-11-17 16:04:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:57,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:57,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420734401] [2023-11-17 16:04:57,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420734401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:57,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502963084] [2023-11-17 16:04:57,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:04:57,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:57,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:57,349 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:57,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:04:57,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:04:57,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:57,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:04:57,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:57,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:57,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 99 treesize of output 83 [2023-11-17 16:04:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:57,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502963084] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:57,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:57,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 16:04:57,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972225080] [2023-11-17 16:04:57,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:57,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:04:57,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:57,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:04:57,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:04:57,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 899 [2023-11-17 16:04:57,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 137 transitions, 1263 flow. Second operand has 12 states, 12 states have (on average 338.5833333333333) internal successors, (4063), 12 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:57,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:57,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 899 [2023-11-17 16:04:57,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:57,760 INFO L124 PetriNetUnfolderBase]: 229/460 cut-off events. [2023-11-17 16:04:57,760 INFO L125 PetriNetUnfolderBase]: For 1376/1376 co-relation queries the response was YES. [2023-11-17 16:04:57,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2186 conditions, 460 events. 229/460 cut-off events. For 1376/1376 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2139 event pairs, 77 based on Foata normal form. 19/478 useless extension candidates. Maximal degree in co-relation 2073. Up to 270 conditions per place. [2023-11-17 16:04:57,765 INFO L140 encePairwiseOnDemand]: 893/899 looper letters, 101 selfloop transitions, 10 changer transitions 23/136 dead transitions. [2023-11-17 16:04:57,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 136 transitions, 1414 flow [2023-11-17 16:04:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:04:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:04:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2392 transitions. [2023-11-17 16:04:57,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3801048784363579 [2023-11-17 16:04:57,769 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2392 transitions. [2023-11-17 16:04:57,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2392 transitions. [2023-11-17 16:04:57,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:57,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2392 transitions. [2023-11-17 16:04:57,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 341.7142857142857) internal successors, (2392), 7 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:57,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 899.0) internal successors, (7192), 8 states have internal predecessors, (7192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:57,778 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 899.0) internal successors, (7192), 8 states have internal predecessors, (7192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:57,778 INFO L175 Difference]: Start difference. First operand has 91 places, 137 transitions, 1263 flow. Second operand 7 states and 2392 transitions. [2023-11-17 16:04:57,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 136 transitions, 1414 flow [2023-11-17 16:04:57,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 136 transitions, 1383 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-11-17 16:04:57,788 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 912 flow [2023-11-17 16:04:57,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2023-11-17 16:04:57,788 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 72 predicate places. [2023-11-17 16:04:57,789 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 912 flow [2023-11-17 16:04:57,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 338.5833333333333) internal successors, (4063), 12 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:57,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:57,789 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:57,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:57,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:04:57,996 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:57,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1350435165, now seen corresponding path program 12 times [2023-11-17 16:04:57,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:57,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437512703] [2023-11-17 16:04:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:57,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:58,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:58,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437512703] [2023-11-17 16:04:58,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437512703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:58,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084393349] [2023-11-17 16:04:58,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:04:58,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:58,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:58,101 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:58,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:04:58,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:04:58,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:58,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:04:58,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:58,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:58,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 99 treesize of output 83 [2023-11-17 16:04:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:58,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084393349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:58,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:58,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 16:04:58,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796959073] [2023-11-17 16:04:58,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:58,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:04:58,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:58,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:04:58,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:04:58,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 899 [2023-11-17 16:04:58,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 912 flow. Second operand has 13 states, 13 states have (on average 338.38461538461536) internal successors, (4399), 13 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:58,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:58,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 899 [2023-11-17 16:04:58,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:58,545 INFO L124 PetriNetUnfolderBase]: 215/396 cut-off events. [2023-11-17 16:04:58,545 INFO L125 PetriNetUnfolderBase]: For 1168/1168 co-relation queries the response was YES. [2023-11-17 16:04:58,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1966 conditions, 396 events. 215/396 cut-off events. For 1168/1168 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1600 event pairs, 34 based on Foata normal form. 19/414 useless extension candidates. Maximal degree in co-relation 1940. Up to 153 conditions per place. [2023-11-17 16:04:58,549 INFO L140 encePairwiseOnDemand]: 893/899 looper letters, 81 selfloop transitions, 45 changer transitions 0/128 dead transitions. [2023-11-17 16:04:58,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 1314 flow [2023-11-17 16:04:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3062 transitions. [2023-11-17 16:04:58,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37844518600914595 [2023-11-17 16:04:58,553 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3062 transitions. [2023-11-17 16:04:58,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3062 transitions. [2023-11-17 16:04:58,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:58,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3062 transitions. [2023-11-17 16:04:58,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 340.22222222222223) internal successors, (3062), 9 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:58,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:58,563 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:58,563 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 912 flow. Second operand 9 states and 3062 transitions. [2023-11-17 16:04:58,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 1314 flow [2023-11-17 16:04:58,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 128 transitions, 1214 flow, removed 35 selfloop flow, removed 13 redundant places. [2023-11-17 16:04:58,574 INFO L231 Difference]: Finished difference. Result has 75 places, 108 transitions, 1000 flow [2023-11-17 16:04:58,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1000, PETRI_PLACES=75, PETRI_TRANSITIONS=108} [2023-11-17 16:04:58,575 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 53 predicate places. [2023-11-17 16:04:58,575 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 108 transitions, 1000 flow [2023-11-17 16:04:58,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 338.38461538461536) internal successors, (4399), 13 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:58,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:58,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:58,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:58,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:58,782 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:58,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:58,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1729378951, now seen corresponding path program 13 times [2023-11-17 16:04:58,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:58,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257650715] [2023-11-17 16:04:58,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:58,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:04:58,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:58,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257650715] [2023-11-17 16:04:58,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257650715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:58,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727221585] [2023-11-17 16:04:58,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:04:58,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:58,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:58,922 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:58,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:04:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:59,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:04:59,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:04:59,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:59,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 174 treesize of output 110 [2023-11-17 16:04:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:04:59,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727221585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:59,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:59,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-17 16:04:59,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109954738] [2023-11-17 16:04:59,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:59,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:04:59,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:59,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:04:59,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:04:59,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 899 [2023-11-17 16:04:59,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 108 transitions, 1000 flow. Second operand has 15 states, 15 states have (on average 338.8) internal successors, (5082), 15 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:59,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:59,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 899 [2023-11-17 16:04:59,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:59,424 INFO L124 PetriNetUnfolderBase]: 196/359 cut-off events. [2023-11-17 16:04:59,425 INFO L125 PetriNetUnfolderBase]: For 856/858 co-relation queries the response was YES. [2023-11-17 16:04:59,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1744 conditions, 359 events. 196/359 cut-off events. For 856/858 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1305 event pairs, 19 based on Foata normal form. 30/385 useless extension candidates. Maximal degree in co-relation 1726. Up to 134 conditions per place. [2023-11-17 16:04:59,428 INFO L140 encePairwiseOnDemand]: 894/899 looper letters, 80 selfloop transitions, 30 changer transitions 0/112 dead transitions. [2023-11-17 16:04:59,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 112 transitions, 1152 flow [2023-11-17 16:04:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3063 transitions. [2023-11-17 16:04:59,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378568780126066 [2023-11-17 16:04:59,432 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3063 transitions. [2023-11-17 16:04:59,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3063 transitions. [2023-11-17 16:04:59,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:59,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3063 transitions. [2023-11-17 16:04:59,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 340.3333333333333) internal successors, (3063), 9 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:59,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:59,443 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 899.0) internal successors, (8990), 10 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:59,443 INFO L175 Difference]: Start difference. First operand has 75 places, 108 transitions, 1000 flow. Second operand 9 states and 3063 transitions. [2023-11-17 16:04:59,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 112 transitions, 1152 flow [2023-11-17 16:04:59,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 1113 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-11-17 16:04:59,449 INFO L231 Difference]: Finished difference. Result has 72 places, 89 transitions, 807 flow [2023-11-17 16:04:59,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=807, PETRI_PLACES=72, PETRI_TRANSITIONS=89} [2023-11-17 16:04:59,450 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 50 predicate places. [2023-11-17 16:04:59,450 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 89 transitions, 807 flow [2023-11-17 16:04:59,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 338.8) internal successors, (5082), 15 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:59,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:59,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:59,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-17 16:04:59,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 16:04:59,657 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:59,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:59,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1591822760, now seen corresponding path program 14 times [2023-11-17 16:04:59,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:59,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105532230] [2023-11-17 16:04:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:59,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:05:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:02,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:05:02,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105532230] [2023-11-17 16:05:02,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105532230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:05:02,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879737698] [2023-11-17 16:05:02,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:05:02,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:05:02,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:05:02,003 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:05:02,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:05:02,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:05:02,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:05:02,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:05:02,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:05:02,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:05:02,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 90 [2023-11-17 16:05:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:05:02,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:05:04,102 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:05:04,102 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 809 treesize of output 379 [2023-11-17 16:05:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:05:11,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879737698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:05:11,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:05:11,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 28 [2023-11-17 16:05:11,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936472890] [2023-11-17 16:05:11,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:05:11,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 16:05:11,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:05:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 16:05:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2023-11-17 16:05:11,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 899 [2023-11-17 16:05:11,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 89 transitions, 807 flow. Second operand has 29 states, 29 states have (on average 288.9310344827586) internal successors, (8379), 29 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:11,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:05:11,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 899 [2023-11-17 16:05:11,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:05:12,577 INFO L124 PetriNetUnfolderBase]: 265/493 cut-off events. [2023-11-17 16:05:12,577 INFO L125 PetriNetUnfolderBase]: For 1277/1277 co-relation queries the response was YES. [2023-11-17 16:05:12,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2525 conditions, 493 events. 265/493 cut-off events. For 1277/1277 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1961 event pairs, 8 based on Foata normal form. 1/494 useless extension candidates. Maximal degree in co-relation 2508. Up to 260 conditions per place. [2023-11-17 16:05:12,581 INFO L140 encePairwiseOnDemand]: 889/899 looper letters, 95 selfloop transitions, 67 changer transitions 6/170 dead transitions. [2023-11-17 16:05:12,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 170 transitions, 1613 flow [2023-11-17 16:05:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 16:05:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 16:05:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 6713 transitions. [2023-11-17 16:05:12,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32466025051990133 [2023-11-17 16:05:12,591 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 6713 transitions. [2023-11-17 16:05:12,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 6713 transitions. [2023-11-17 16:05:12,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:05:12,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 6713 transitions. [2023-11-17 16:05:12,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 291.8695652173913) internal successors, (6713), 23 states have internal predecessors, (6713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:12,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 899.0) internal successors, (21576), 24 states have internal predecessors, (21576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:12,615 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 899.0) internal successors, (21576), 24 states have internal predecessors, (21576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:12,615 INFO L175 Difference]: Start difference. First operand has 72 places, 89 transitions, 807 flow. Second operand 23 states and 6713 transitions. [2023-11-17 16:05:12,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 170 transitions, 1613 flow [2023-11-17 16:05:12,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 170 transitions, 1553 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-17 16:05:12,623 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 1247 flow [2023-11-17 16:05:12,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1247, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2023-11-17 16:05:12,623 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 76 predicate places. [2023-11-17 16:05:12,623 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 1247 flow [2023-11-17 16:05:12,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 288.9310344827586) internal successors, (8379), 29 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:12,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:05:12,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:05:12,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 16:05:12,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:05:12,831 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:05:12,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:05:12,831 INFO L85 PathProgramCache]: Analyzing trace with hash 654433846, now seen corresponding path program 15 times [2023-11-17 16:05:12,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:05:12,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590268183] [2023-11-17 16:05:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:05:12,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:05:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:05:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:14,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:05:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590268183] [2023-11-17 16:05:14,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590268183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:05:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240020064] [2023-11-17 16:05:14,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:05:14,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:05:14,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:05:14,251 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:05:14,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:05:14,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:05:14,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:05:14,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-17 16:05:14,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:05:14,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:05:14,465 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 10 treesize of output 8 [2023-11-17 16:05:14,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-11-17 16:05:14,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:05:14,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 8 treesize of output 1 [2023-11-17 16:05:15,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:05:15,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 84 [2023-11-17 16:05:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:05:15,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:05:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:05:22,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240020064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:05:22,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:05:22,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 33 [2023-11-17 16:05:22,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594235913] [2023-11-17 16:05:22,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:05:22,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:05:22,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:05:22,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:05:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=916, Unknown=9, NotChecked=0, Total=1122 [2023-11-17 16:05:22,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 899 [2023-11-17 16:05:22,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 1247 flow. Second operand has 34 states, 34 states have (on average 296.6764705882353) internal successors, (10087), 34 states have internal predecessors, (10087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:22,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:05:22,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 899 [2023-11-17 16:05:22,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:05:45,045 INFO L124 PetriNetUnfolderBase]: 537/935 cut-off events. [2023-11-17 16:05:45,045 INFO L125 PetriNetUnfolderBase]: For 3543/3543 co-relation queries the response was YES. [2023-11-17 16:05:45,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5498 conditions, 935 events. 537/935 cut-off events. For 3543/3543 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4289 event pairs, 6 based on Foata normal form. 5/939 useless extension candidates. Maximal degree in co-relation 5473. Up to 367 conditions per place. [2023-11-17 16:05:45,052 INFO L140 encePairwiseOnDemand]: 889/899 looper letters, 123 selfloop transitions, 204 changer transitions 13/342 dead transitions. [2023-11-17 16:05:45,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 342 transitions, 3581 flow [2023-11-17 16:05:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-17 16:05:45,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-17 16:05:45,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 15303 transitions. [2023-11-17 16:05:45,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3337695478636393 [2023-11-17 16:05:45,080 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 15303 transitions. [2023-11-17 16:05:45,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 15303 transitions. [2023-11-17 16:05:45,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:05:45,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 15303 transitions. [2023-11-17 16:05:45,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 300.05882352941177) internal successors, (15303), 51 states have internal predecessors, (15303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:45,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 899.0) internal successors, (46748), 52 states have internal predecessors, (46748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:45,140 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 899.0) internal successors, (46748), 52 states have internal predecessors, (46748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:45,140 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 1247 flow. Second operand 51 states and 15303 transitions. [2023-11-17 16:05:45,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 342 transitions, 3581 flow [2023-11-17 16:05:45,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 342 transitions, 3463 flow, removed 37 selfloop flow, removed 8 redundant places. [2023-11-17 16:05:45,158 INFO L231 Difference]: Finished difference. Result has 141 places, 236 transitions, 2969 flow [2023-11-17 16:05:45,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=2969, PETRI_PLACES=141, PETRI_TRANSITIONS=236} [2023-11-17 16:05:45,158 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 119 predicate places. [2023-11-17 16:05:45,159 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 236 transitions, 2969 flow [2023-11-17 16:05:45,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 296.6764705882353) internal successors, (10087), 34 states have internal predecessors, (10087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:45,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:05:45,160 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:05:45,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 16:05:45,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:05:45,367 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:05:45,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:05:45,367 INFO L85 PathProgramCache]: Analyzing trace with hash -68378756, now seen corresponding path program 16 times [2023-11-17 16:05:45,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:05:45,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43409153] [2023-11-17 16:05:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:05:45,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:05:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:05:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:48,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:05:48,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43409153] [2023-11-17 16:05:48,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43409153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:05:48,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476764810] [2023-11-17 16:05:48,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:05:48,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:05:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:05:48,225 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:05:48,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:05:48,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:05:48,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:05:48,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-17 16:05:48,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:05:48,349 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 14 treesize of output 12 [2023-11-17 16:05:48,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2023-11-17 16:05:48,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 8 treesize of output 1 [2023-11-17 16:05:48,565 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 16 treesize of output 11 [2023-11-17 16:05:49,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:05:49,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 203 treesize of output 115 [2023-11-17 16:05:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:49,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:05:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:05:58,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476764810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:05:58,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:05:58,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 36 [2023-11-17 16:05:58,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666828991] [2023-11-17 16:05:58,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:05:58,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:05:58,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:05:58,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:05:58,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1107, Unknown=4, NotChecked=0, Total=1332 [2023-11-17 16:05:58,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 899 [2023-11-17 16:05:58,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 236 transitions, 2969 flow. Second operand has 37 states, 37 states have (on average 288.4864864864865) internal successors, (10674), 37 states have internal predecessors, (10674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:58,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:05:58,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 899 [2023-11-17 16:05:58,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:06:38,987 INFO L124 PetriNetUnfolderBase]: 1068/1812 cut-off events. [2023-11-17 16:06:38,988 INFO L125 PetriNetUnfolderBase]: For 7074/7074 co-relation queries the response was YES. [2023-11-17 16:06:38,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12173 conditions, 1812 events. 1068/1812 cut-off events. For 7074/7074 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9385 event pairs, 12 based on Foata normal form. 14/1826 useless extension candidates. Maximal degree in co-relation 12146. Up to 711 conditions per place. [2023-11-17 16:06:39,004 INFO L140 encePairwiseOnDemand]: 888/899 looper letters, 179 selfloop transitions, 448 changer transitions 13/642 dead transitions. [2023-11-17 16:06:39,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 642 transitions, 8330 flow [2023-11-17 16:06:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-17 16:06:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-11-17 16:06:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 22457 transitions. [2023-11-17 16:06:39,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3244152954942721 [2023-11-17 16:06:39,027 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 22457 transitions. [2023-11-17 16:06:39,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 22457 transitions. [2023-11-17 16:06:39,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:06:39,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 22457 transitions. [2023-11-17 16:06:39,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 291.64935064935065) internal successors, (22457), 77 states have internal predecessors, (22457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:39,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 899.0) internal successors, (70122), 78 states have internal predecessors, (70122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:39,108 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 899.0) internal successors, (70122), 78 states have internal predecessors, (70122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:39,108 INFO L175 Difference]: Start difference. First operand has 141 places, 236 transitions, 2969 flow. Second operand 77 states and 22457 transitions. [2023-11-17 16:06:39,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 642 transitions, 8330 flow [2023-11-17 16:06:39,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 642 transitions, 7199 flow, removed 459 selfloop flow, removed 18 redundant places. [2023-11-17 16:06:39,168 INFO L231 Difference]: Finished difference. Result has 215 places, 506 transitions, 6885 flow [2023-11-17 16:06:39,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=6885, PETRI_PLACES=215, PETRI_TRANSITIONS=506} [2023-11-17 16:06:39,169 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 193 predicate places. [2023-11-17 16:06:39,169 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 506 transitions, 6885 flow [2023-11-17 16:06:39,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 288.4864864864865) internal successors, (10674), 37 states have internal predecessors, (10674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:39,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:06:39,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:06:39,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 16:06:39,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:06:39,377 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:06:39,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:06:39,378 INFO L85 PathProgramCache]: Analyzing trace with hash -78424128, now seen corresponding path program 17 times [2023-11-17 16:06:39,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:06:39,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631144919] [2023-11-17 16:06:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:06:39,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:06:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:06:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:06:40,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:06:40,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631144919] [2023-11-17 16:06:40,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631144919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:06:40,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091304656] [2023-11-17 16:06:40,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:06:40,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:06:40,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:06:40,896 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:06:40,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:06:41,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:06:41,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:06:41,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 16:06:41,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:06:41,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:06:41,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 203 treesize of output 115 [2023-11-17 16:06:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:06:41,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:06:43,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:06:43,846 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 424 treesize of output 173 [2023-11-17 16:06:45,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:06:45,452 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 394 treesize of output 170 [2023-11-17 16:06:46,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:06:46,145 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 847 treesize of output 320 [2023-11-17 16:06:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:06:49,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091304656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:06:49,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:06:49,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 31 [2023-11-17 16:06:49,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391242644] [2023-11-17 16:06:49,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:06:49,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:06:49,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:06:49,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:06:49,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:06:49,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 899 [2023-11-17 16:06:49,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 506 transitions, 6885 flow. Second operand has 32 states, 32 states have (on average 288.65625) internal successors, (9237), 32 states have internal predecessors, (9237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:49,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:06:49,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 899 [2023-11-17 16:06:49,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:06:51,622 INFO L124 PetriNetUnfolderBase]: 1230/2049 cut-off events. [2023-11-17 16:06:51,622 INFO L125 PetriNetUnfolderBase]: For 8755/8755 co-relation queries the response was YES. [2023-11-17 16:06:51,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14376 conditions, 2049 events. 1230/2049 cut-off events. For 8755/8755 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10580 event pairs, 98 based on Foata normal form. 2/2050 useless extension candidates. Maximal degree in co-relation 14337. Up to 1389 conditions per place. [2023-11-17 16:06:51,641 INFO L140 encePairwiseOnDemand]: 889/899 looper letters, 378 selfloop transitions, 262 changer transitions 8/650 dead transitions. [2023-11-17 16:06:51,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 650 transitions, 9770 flow [2023-11-17 16:06:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:06:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:06:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 8465 transitions. [2023-11-17 16:06:51,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3246902688811323 [2023-11-17 16:06:51,649 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 8465 transitions. [2023-11-17 16:06:51,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 8465 transitions. [2023-11-17 16:06:51,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:06:51,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 8465 transitions. [2023-11-17 16:06:51,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 291.8965517241379) internal successors, (8465), 29 states have internal predecessors, (8465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:51,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 899.0) internal successors, (26970), 30 states have internal predecessors, (26970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:51,677 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 899.0) internal successors, (26970), 30 states have internal predecessors, (26970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:51,677 INFO L175 Difference]: Start difference. First operand has 215 places, 506 transitions, 6885 flow. Second operand 29 states and 8465 transitions. [2023-11-17 16:06:51,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 650 transitions, 9770 flow [2023-11-17 16:06:51,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 650 transitions, 9174 flow, removed 262 selfloop flow, removed 11 redundant places. [2023-11-17 16:06:51,775 INFO L231 Difference]: Finished difference. Result has 237 places, 589 transitions, 8501 flow [2023-11-17 16:06:51,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8501, PETRI_PLACES=237, PETRI_TRANSITIONS=589} [2023-11-17 16:06:51,776 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 215 predicate places. [2023-11-17 16:06:51,776 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 589 transitions, 8501 flow [2023-11-17 16:06:51,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 288.65625) internal successors, (9237), 32 states have internal predecessors, (9237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:51,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:06:51,777 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:06:51,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 16:06:51,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:06:51,983 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:06:51,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:06:51,983 INFO L85 PathProgramCache]: Analyzing trace with hash 450843754, now seen corresponding path program 18 times [2023-11-17 16:06:51,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:06:51,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191663685] [2023-11-17 16:06:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:06:51,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:06:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:06:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:06:53,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:06:53,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191663685] [2023-11-17 16:06:53,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191663685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:06:53,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413418048] [2023-11-17 16:06:53,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:06:53,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:06:53,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:06:53,288 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:06:53,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 16:06:53,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:06:53,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:06:53,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 16:06:53,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:06:53,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:06:53,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 90 [2023-11-17 16:06:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:06:54,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:06:56,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:06:56,220 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 527 treesize of output 200 [2023-11-17 16:06:57,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:06:57,943 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 303 treesize of output 128 [2023-11-17 16:06:58,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:06:58,927 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 870 treesize of output 316 [2023-11-17 16:07:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:07:02,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413418048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:07:02,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:07:02,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-11-17 16:07:02,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419753158] [2023-11-17 16:07:02,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:07:02,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 16:07:02,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:07:02,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 16:07:02,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2023-11-17 16:07:02,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 899 [2023-11-17 16:07:02,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 589 transitions, 8501 flow. Second operand has 31 states, 31 states have (on average 288.741935483871) internal successors, (8951), 31 states have internal predecessors, (8951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:02,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:07:02,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 899 [2023-11-17 16:07:02,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:07:11,260 INFO L124 PetriNetUnfolderBase]: 1612/2722 cut-off events. [2023-11-17 16:07:11,260 INFO L125 PetriNetUnfolderBase]: For 14825/14825 co-relation queries the response was YES. [2023-11-17 16:07:11,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19985 conditions, 2722 events. 1612/2722 cut-off events. For 14825/14825 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15115 event pairs, 54 based on Foata normal form. 5/2726 useless extension candidates. Maximal degree in co-relation 19941. Up to 1233 conditions per place. [2023-11-17 16:07:11,284 INFO L140 encePairwiseOnDemand]: 889/899 looper letters, 443 selfloop transitions, 467 changer transitions 14/926 dead transitions. [2023-11-17 16:07:11,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 926 transitions, 14210 flow [2023-11-17 16:07:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-17 16:07:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-11-17 16:07:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 18688 transitions. [2023-11-17 16:07:11,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3248053392658509 [2023-11-17 16:07:11,301 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 18688 transitions. [2023-11-17 16:07:11,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 18688 transitions. [2023-11-17 16:07:11,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:07:11,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 18688 transitions. [2023-11-17 16:07:11,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 292.0) internal successors, (18688), 64 states have internal predecessors, (18688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:11,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 899.0) internal successors, (58435), 65 states have internal predecessors, (58435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:11,426 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 899.0) internal successors, (58435), 65 states have internal predecessors, (58435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:11,427 INFO L175 Difference]: Start difference. First operand has 237 places, 589 transitions, 8501 flow. Second operand 64 states and 18688 transitions. [2023-11-17 16:07:11,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 926 transitions, 14210 flow [2023-11-17 16:07:11,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 926 transitions, 13983 flow, removed 57 selfloop flow, removed 12 redundant places. [2023-11-17 16:07:11,563 INFO L231 Difference]: Finished difference. Result has 307 places, 789 transitions, 13218 flow [2023-11-17 16:07:11,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=8316, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=13218, PETRI_PLACES=307, PETRI_TRANSITIONS=789} [2023-11-17 16:07:11,564 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 285 predicate places. [2023-11-17 16:07:11,564 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 789 transitions, 13218 flow [2023-11-17 16:07:11,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 288.741935483871) internal successors, (8951), 31 states have internal predecessors, (8951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:11,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:07:11,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:07:11,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 16:07:11,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-17 16:07:11,766 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:07:11,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:07:11,767 INFO L85 PathProgramCache]: Analyzing trace with hash -151920234, now seen corresponding path program 19 times [2023-11-17 16:07:11,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:07:11,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864744975] [2023-11-17 16:07:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:07:11,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:07:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:07:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:07:43,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:07:43,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864744975] [2023-11-17 16:07:43,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864744975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:07:43,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897101110] [2023-11-17 16:07:43,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:07:43,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:07:43,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:07:43,864 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:07:43,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 16:07:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:07:43,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 16:07:43,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:07:44,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:07:44,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 81 [2023-11-17 16:07:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:07:44,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:07:46,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:07:46,531 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 800 treesize of output 297 [2023-11-17 16:07:50,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:07:50,773 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 504 treesize of output 194 [2023-11-17 16:07:51,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:07:51,684 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 256 treesize of output 115 [2023-11-17 16:07:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:07:53,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897101110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:07:53,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:07:53,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-11-17 16:07:53,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359863455] [2023-11-17 16:07:53,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:07:53,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 16:07:53,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:07:53,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 16:07:53,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2023-11-17 16:07:53,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 899 [2023-11-17 16:07:53,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 789 transitions, 13218 flow. Second operand has 31 states, 31 states have (on average 296.7096774193548) internal successors, (9198), 31 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:53,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:07:53,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 899 [2023-11-17 16:07:53,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:07:55,370 INFO L124 PetriNetUnfolderBase]: 1658/2817 cut-off events. [2023-11-17 16:07:55,371 INFO L125 PetriNetUnfolderBase]: For 18249/18249 co-relation queries the response was YES. [2023-11-17 16:07:55,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22726 conditions, 2817 events. 1658/2817 cut-off events. For 18249/18249 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15890 event pairs, 83 based on Foata normal form. 3/2820 useless extension candidates. Maximal degree in co-relation 22663. Up to 2091 conditions per place. [2023-11-17 16:07:55,404 INFO L140 encePairwiseOnDemand]: 889/899 looper letters, 557 selfloop transitions, 308 changer transitions 6/873 dead transitions. [2023-11-17 16:07:55,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 873 transitions, 15911 flow [2023-11-17 16:07:55,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:07:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:07:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 8686 transitions. [2023-11-17 16:07:55,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33316712055540637 [2023-11-17 16:07:55,416 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 8686 transitions. [2023-11-17 16:07:55,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 8686 transitions. [2023-11-17 16:07:55,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:07:55,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 8686 transitions. [2023-11-17 16:07:55,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 299.51724137931035) internal successors, (8686), 29 states have internal predecessors, (8686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:55,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 899.0) internal successors, (26970), 30 states have internal predecessors, (26970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:55,448 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 899.0) internal successors, (26970), 30 states have internal predecessors, (26970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:55,448 INFO L175 Difference]: Start difference. First operand has 307 places, 789 transitions, 13218 flow. Second operand 29 states and 8686 transitions. [2023-11-17 16:07:55,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 873 transitions, 15911 flow [2023-11-17 16:07:55,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 873 transitions, 15318 flow, removed 222 selfloop flow, removed 17 redundant places. [2023-11-17 16:07:55,717 INFO L231 Difference]: Finished difference. Result has 323 places, 826 transitions, 14085 flow [2023-11-17 16:07:55,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=12633, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14085, PETRI_PLACES=323, PETRI_TRANSITIONS=826} [2023-11-17 16:07:55,718 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 301 predicate places. [2023-11-17 16:07:55,719 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 826 transitions, 14085 flow [2023-11-17 16:07:55,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 296.7096774193548) internal successors, (9198), 31 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:55,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:07:55,720 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:07:55,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 16:07:55,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-17 16:07:55,923 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:07:55,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:07:55,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2100879442, now seen corresponding path program 20 times [2023-11-17 16:07:55,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:07:55,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012569930] [2023-11-17 16:07:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:07:55,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:07:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:10,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:10,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012569930] [2023-11-17 16:08:10,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012569930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:10,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691359590] [2023-11-17 16:08:10,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:08:10,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:10,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:10,469 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:10,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 16:08:10,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:08:10,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:10,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 16:08:10,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:11,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:11,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 217 treesize of output 113 [2023-11-17 16:08:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:11,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:13,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:13,578 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 527 treesize of output 200 [2023-11-17 16:08:15,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:15,212 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 303 treesize of output 128 [2023-11-17 16:08:16,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:16,015 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 870 treesize of output 316 [2023-11-17 16:08:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:20,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691359590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:20,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:20,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 33 [2023-11-17 16:08:20,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644364623] [2023-11-17 16:08:20,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:20,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:08:20,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:08:20,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 16:08:20,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 899 [2023-11-17 16:08:20,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 826 transitions, 14085 flow. Second operand has 34 states, 34 states have (on average 288.61764705882354) internal successors, (9813), 34 states have internal predecessors, (9813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:20,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:20,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 899 [2023-11-17 16:08:20,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:28,945 INFO L124 PetriNetUnfolderBase]: 1943/3303 cut-off events. [2023-11-17 16:08:28,945 INFO L125 PetriNetUnfolderBase]: For 23545/23545 co-relation queries the response was YES. [2023-11-17 16:08:28,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27513 conditions, 3303 events. 1943/3303 cut-off events. For 23545/23545 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19255 event pairs, 62 based on Foata normal form. 12/3315 useless extension candidates. Maximal degree in co-relation 27447. Up to 1566 conditions per place. [2023-11-17 16:08:28,979 INFO L140 encePairwiseOnDemand]: 889/899 looper letters, 496 selfloop transitions, 599 changer transitions 14/1111 dead transitions. [2023-11-17 16:08:28,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1111 transitions, 20185 flow [2023-11-17 16:08:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-17 16:08:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-11-17 16:08:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 18669 transitions. [2023-11-17 16:08:28,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32447511123470524 [2023-11-17 16:08:28,995 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 18669 transitions. [2023-11-17 16:08:28,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 18669 transitions. [2023-11-17 16:08:28,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:28,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 18669 transitions. [2023-11-17 16:08:29,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 291.703125) internal successors, (18669), 64 states have internal predecessors, (18669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 899.0) internal successors, (58435), 65 states have internal predecessors, (58435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,060 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 899.0) internal successors, (58435), 65 states have internal predecessors, (58435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,061 INFO L175 Difference]: Start difference. First operand has 323 places, 826 transitions, 14085 flow. Second operand 64 states and 18669 transitions. [2023-11-17 16:08:29,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1111 transitions, 20185 flow [2023-11-17 16:08:29,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1111 transitions, 19876 flow, removed 57 selfloop flow, removed 17 redundant places. [2023-11-17 16:08:29,405 INFO L231 Difference]: Finished difference. Result has 382 places, 987 transitions, 18810 flow [2023-11-17 16:08:29,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=13684, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=18810, PETRI_PLACES=382, PETRI_TRANSITIONS=987} [2023-11-17 16:08:29,406 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 360 predicate places. [2023-11-17 16:08:29,406 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 987 transitions, 18810 flow [2023-11-17 16:08:29,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 288.61764705882354) internal successors, (9813), 34 states have internal predecessors, (9813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:29,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:29,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:29,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:29,608 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:29,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1564639534, now seen corresponding path program 21 times [2023-11-17 16:08:29,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:29,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291444896] [2023-11-17 16:08:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:29,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:31,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:31,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291444896] [2023-11-17 16:08:31,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291444896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:31,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931525781] [2023-11-17 16:08:31,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:08:31,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:31,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:31,325 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:31,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 16:08:31,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:08:31,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:31,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 16:08:31,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:31,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 16:08:31,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:08:31,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:08:31,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:31,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 99 [2023-11-17 16:08:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:32,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:39,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931525781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:39,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:39,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 33 [2023-11-17 16:08:39,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213865514] [2023-11-17 16:08:39,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:39,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:08:39,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:39,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:08:39,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=953, Unknown=1, NotChecked=0, Total=1122 [2023-11-17 16:08:39,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 899 [2023-11-17 16:08:39,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 987 transitions, 18810 flow. Second operand has 34 states, 34 states have (on average 290.61764705882354) internal successors, (9881), 34 states have internal predecessors, (9881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:39,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:39,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 899 [2023-11-17 16:08:39,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:22,557 INFO L124 PetriNetUnfolderBase]: 2962/4965 cut-off events. [2023-11-17 16:09:22,558 INFO L125 PetriNetUnfolderBase]: For 43618/43618 co-relation queries the response was YES. [2023-11-17 16:09:22,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46550 conditions, 4965 events. 2962/4965 cut-off events. For 43618/43618 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 30384 event pairs, 6 based on Foata normal form. 22/4987 useless extension candidates. Maximal degree in co-relation 46472. Up to 1492 conditions per place. [2023-11-17 16:09:22,619 INFO L140 encePairwiseOnDemand]: 889/899 looper letters, 342 selfloop transitions, 1360 changer transitions 35/1739 dead transitions. [2023-11-17 16:09:22,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 1739 transitions, 34971 flow [2023-11-17 16:09:22,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-11-17 16:09:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2023-11-17 16:09:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 33472 transitions. [2023-11-17 16:09:22,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3266007064379525 [2023-11-17 16:09:22,647 INFO L72 ComplementDD]: Start complementDD. Operand 114 states and 33472 transitions. [2023-11-17 16:09:22,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 33472 transitions. [2023-11-17 16:09:22,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:22,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 114 states and 33472 transitions. [2023-11-17 16:09:22,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 115 states, 114 states have (on average 293.6140350877193) internal successors, (33472), 114 states have internal predecessors, (33472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:22,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 115 states, 115 states have (on average 899.0) internal successors, (103385), 115 states have internal predecessors, (103385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:22,860 INFO L81 ComplementDD]: Finished complementDD. Result has 115 states, 115 states have (on average 899.0) internal successors, (103385), 115 states have internal predecessors, (103385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:22,860 INFO L175 Difference]: Start difference. First operand has 382 places, 987 transitions, 18810 flow. Second operand 114 states and 33472 transitions. [2023-11-17 16:09:22,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 1739 transitions, 34971 flow [2023-11-17 16:09:23,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1739 transitions, 34293 flow, removed 91 selfloop flow, removed 35 redundant places. [2023-11-17 16:09:23,514 INFO L231 Difference]: Finished difference. Result has 472 places, 1530 transitions, 33784 flow [2023-11-17 16:09:23,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=18200, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=844, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=114, PETRI_FLOW=33784, PETRI_PLACES=472, PETRI_TRANSITIONS=1530} [2023-11-17 16:09:23,516 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 450 predicate places. [2023-11-17 16:09:23,516 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1530 transitions, 33784 flow [2023-11-17 16:09:23,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 290.61764705882354) internal successors, (9881), 34 states have internal predecessors, (9881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:23,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:23,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:23,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 16:09:23,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:23,718 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:23,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:23,718 INFO L85 PathProgramCache]: Analyzing trace with hash -735248842, now seen corresponding path program 22 times [2023-11-17 16:09:23,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:23,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300647923] [2023-11-17 16:09:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:23,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:25,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:25,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300647923] [2023-11-17 16:09:25,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300647923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:25,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380555162] [2023-11-17 16:09:25,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:09:25,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:25,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:25,743 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:25,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 16:09:25,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:09:25,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:25,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-17 16:09:25,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:26,516 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:26,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 124 [2023-11-17 16:09:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:26,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:30,375 INFO L349 Elim1Store]: treesize reduction 40, result has 18.4 percent of original size [2023-11-17 16:09:30,376 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 1650 treesize of output 643 [2023-11-17 16:09:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:31,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380555162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:31,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:31,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 33 [2023-11-17 16:09:31,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170671800] [2023-11-17 16:09:31,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:31,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:09:31,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:31,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:09:31,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 16:09:31,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 899 [2023-11-17 16:09:31,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1530 transitions, 33784 flow. Second operand has 34 states, 34 states have (on average 288.5882352941176) internal successors, (9812), 34 states have internal predecessors, (9812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:31,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:31,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 899 [2023-11-17 16:09:31,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:48,790 INFO L124 PetriNetUnfolderBase]: 2758/4602 cut-off events. [2023-11-17 16:09:48,790 INFO L125 PetriNetUnfolderBase]: For 50086/50086 co-relation queries the response was YES. [2023-11-17 16:09:48,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47081 conditions, 4602 events. 2758/4602 cut-off events. For 50086/50086 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 27893 event pairs, 85 based on Foata normal form. 19/4621 useless extension candidates. Maximal degree in co-relation 46993. Up to 1957 conditions per place. [2023-11-17 16:09:48,942 INFO L140 encePairwiseOnDemand]: 888/899 looper letters, 413 selfloop transitions, 1090 changer transitions 20/1525 dead transitions. [2023-11-17 16:09:48,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 1525 transitions, 34861 flow [2023-11-17 16:09:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-17 16:09:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-17 16:09:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 16029 transitions. [2023-11-17 16:09:48,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32417838001820204 [2023-11-17 16:09:48,956 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 16029 transitions. [2023-11-17 16:09:48,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 16029 transitions. [2023-11-17 16:09:48,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:48,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 16029 transitions. [2023-11-17 16:09:48,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 291.43636363636364) internal successors, (16029), 55 states have internal predecessors, (16029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:49,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 899.0) internal successors, (50344), 56 states have internal predecessors, (50344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:49,011 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 899.0) internal successors, (50344), 56 states have internal predecessors, (50344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:49,011 INFO L175 Difference]: Start difference. First operand has 472 places, 1530 transitions, 33784 flow. Second operand 55 states and 16029 transitions. [2023-11-17 16:09:49,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 1525 transitions, 34861 flow [2023-11-17 16:09:49,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 1525 transitions, 32261 flow, removed 954 selfloop flow, removed 29 redundant places. [2023-11-17 16:09:49,956 INFO L231 Difference]: Finished difference. Result has 491 places, 1424 transitions, 32258 flow [2023-11-17 16:09:49,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=27109, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=32258, PETRI_PLACES=491, PETRI_TRANSITIONS=1424} [2023-11-17 16:09:49,957 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 469 predicate places. [2023-11-17 16:09:49,957 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 1424 transitions, 32258 flow [2023-11-17 16:09:49,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 288.5882352941176) internal successors, (9812), 34 states have internal predecessors, (9812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:49,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:49,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:49,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 16:09:50,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 16:09:50,159 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:50,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:50,159 INFO L85 PathProgramCache]: Analyzing trace with hash 206659140, now seen corresponding path program 23 times [2023-11-17 16:09:50,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:50,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419282131] [2023-11-17 16:09:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:50,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:53,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:53,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419282131] [2023-11-17 16:09:53,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419282131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:53,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397716561] [2023-11-17 16:09:53,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:09:53,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:53,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:53,600 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:53,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 16:09:53,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:09:53,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:53,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 16:09:53,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:53,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:09:53,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:09:53,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:09:54,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:54,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 81 [2023-11-17 16:09:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:54,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:10:02,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397716561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:02,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:02,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 36 [2023-11-17 16:10:02,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389798213] [2023-11-17 16:10:02,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:02,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:10:02,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:02,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:10:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1136, Unknown=2, NotChecked=0, Total=1332 [2023-11-17 16:10:02,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 899 [2023-11-17 16:10:02,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 1424 transitions, 32258 flow. Second operand has 37 states, 37 states have (on average 288.4864864864865) internal successors, (10674), 37 states have internal predecessors, (10674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:02,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:02,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 899 [2023-11-17 16:10:02,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:34,313 INFO L124 PetriNetUnfolderBase]: 2917/4908 cut-off events. [2023-11-17 16:10:34,313 INFO L125 PetriNetUnfolderBase]: For 50751/50751 co-relation queries the response was YES. [2023-11-17 16:10:34,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51716 conditions, 4908 events. 2917/4908 cut-off events. For 50751/50751 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30520 event pairs, 24 based on Foata normal form. 9/4917 useless extension candidates. Maximal degree in co-relation 51631. Up to 2001 conditions per place. [2023-11-17 16:10:34,373 INFO L140 encePairwiseOnDemand]: 889/899 looper letters, 423 selfloop transitions, 1186 changer transitions 22/1633 dead transitions. [2023-11-17 16:10:34,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 1633 transitions, 38813 flow [2023-11-17 16:10:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-17 16:10:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-17 16:10:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 15145 transitions. [2023-11-17 16:10:34,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32397107897664074 [2023-11-17 16:10:34,386 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 15145 transitions. [2023-11-17 16:10:34,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 15145 transitions. [2023-11-17 16:10:34,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:34,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 15145 transitions. [2023-11-17 16:10:34,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 291.25) internal successors, (15145), 52 states have internal predecessors, (15145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:34,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 899.0) internal successors, (47647), 53 states have internal predecessors, (47647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:34,437 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 899.0) internal successors, (47647), 53 states have internal predecessors, (47647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:34,437 INFO L175 Difference]: Start difference. First operand has 491 places, 1424 transitions, 32258 flow. Second operand 52 states and 15145 transitions. [2023-11-17 16:10:34,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 1633 transitions, 38813 flow [2023-11-17 16:10:35,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1633 transitions, 38508 flow, removed 49 selfloop flow, removed 27 redundant places. [2023-11-17 16:10:35,726 INFO L231 Difference]: Finished difference. Result has 519 places, 1539 transitions, 38488 flow [2023-11-17 16:10:35,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=31987, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=38488, PETRI_PLACES=519, PETRI_TRANSITIONS=1539} [2023-11-17 16:10:35,733 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 497 predicate places. [2023-11-17 16:10:35,734 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1539 transitions, 38488 flow [2023-11-17 16:10:35,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 288.4864864864865) internal successors, (10674), 37 states have internal predecessors, (10674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:35,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:35,735 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:35,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-17 16:10:35,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 16:10:35,938 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:10:35,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -697520846, now seen corresponding path program 24 times [2023-11-17 16:10:35,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:35,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789764982] [2023-11-17 16:10:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:35,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:36,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:36,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789764982] [2023-11-17 16:10:36,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789764982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:36,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007874120] [2023-11-17 16:10:36,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:10:36,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:36,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:36,877 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:10:36,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 16:10:37,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:10:37,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:37,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-17 16:10:37,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:37,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:10:37,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:10:37,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:10:37,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:37,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 116 [2023-11-17 16:10:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:37,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:10:45,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007874120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:45,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:45,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 35 [2023-11-17 16:10:45,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528560512] [2023-11-17 16:10:45,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:45,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 16:10:45,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 16:10:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1044, Unknown=1, NotChecked=0, Total=1260 [2023-11-17 16:10:45,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 899 [2023-11-17 16:10:45,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1539 transitions, 38488 flow. Second operand has 36 states, 36 states have (on average 288.52777777777777) internal successors, (10387), 36 states have internal predecessors, (10387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:45,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:45,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 899 [2023-11-17 16:10:45,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:42,689 INFO L124 PetriNetUnfolderBase]: 3198/5308 cut-off events. [2023-11-17 16:11:42,689 INFO L125 PetriNetUnfolderBase]: For 72172/72172 co-relation queries the response was YES. [2023-11-17 16:11:42,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61846 conditions, 5308 events. 3198/5308 cut-off events. For 72172/72172 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32857 event pairs, 20 based on Foata normal form. 14/5322 useless extension candidates. Maximal degree in co-relation 61758. Up to 1747 conditions per place. [2023-11-17 16:11:42,746 INFO L140 encePairwiseOnDemand]: 888/899 looper letters, 344 selfloop transitions, 1452 changer transitions 7/1805 dead transitions. [2023-11-17 16:11:42,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1805 transitions, 47246 flow [2023-11-17 16:11:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-17 16:11:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-17 16:11:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 19508 transitions. [2023-11-17 16:11:42,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3238756163564823 [2023-11-17 16:11:42,758 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 19508 transitions. [2023-11-17 16:11:42,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 19508 transitions. [2023-11-17 16:11:42,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:42,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 19508 transitions. [2023-11-17 16:11:42,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 291.1641791044776) internal successors, (19508), 67 states have internal predecessors, (19508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:42,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 899.0) internal successors, (61132), 68 states have internal predecessors, (61132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:42,809 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 899.0) internal successors, (61132), 68 states have internal predecessors, (61132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:42,809 INFO L175 Difference]: Start difference. First operand has 519 places, 1539 transitions, 38488 flow. Second operand 67 states and 19508 transitions. [2023-11-17 16:11:42,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1805 transitions, 47246 flow [2023-11-17 16:11:44,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 1805 transitions, 46840 flow, removed 177 selfloop flow, removed 15 redundant places. [2023-11-17 16:11:44,419 INFO L231 Difference]: Finished difference. Result has 572 places, 1711 transitions, 46471 flow [2023-11-17 16:11:44,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=38170, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=46471, PETRI_PLACES=572, PETRI_TRANSITIONS=1711} [2023-11-17 16:11:44,421 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 550 predicate places. [2023-11-17 16:11:44,421 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 1711 transitions, 46471 flow [2023-11-17 16:11:44,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 288.52777777777777) internal successors, (10387), 36 states have internal predecessors, (10387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:44,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:44,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:44,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-17 16:11:44,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 16:11:44,628 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:11:44,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:44,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1880886682, now seen corresponding path program 25 times [2023-11-17 16:11:44,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:44,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008106138] [2023-11-17 16:11:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:44,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:45,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:45,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008106138] [2023-11-17 16:11:45,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008106138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:45,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823588846] [2023-11-17 16:11:45,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:11:45,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:45,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:45,827 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:11:45,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 16:11:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:45,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 16:11:45,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:46,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:46,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 81 [2023-11-17 16:11:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:11:46,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:49,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:49,365 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 1021 treesize of output 365 [2023-11-17 16:11:53,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:53,497 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 525 treesize of output 207 [2023-11-17 16:11:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:11:58,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823588846] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:58,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:58,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 32 [2023-11-17 16:11:58,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580637258] [2023-11-17 16:11:58,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:58,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 16:11:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 16:11:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 16:11:58,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 899 [2023-11-17 16:11:58,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1711 transitions, 46471 flow. Second operand has 33 states, 33 states have (on average 288.6363636363636) internal successors, (9525), 33 states have internal predecessors, (9525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:58,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:58,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 899 [2023-11-17 16:11:58,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:03,738 INFO L124 PetriNetUnfolderBase]: 3303/5478 cut-off events. [2023-11-17 16:12:03,738 INFO L125 PetriNetUnfolderBase]: For 82215/82215 co-relation queries the response was YES. [2023-11-17 16:12:03,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68175 conditions, 5478 events. 3303/5478 cut-off events. For 82215/82215 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34169 event pairs, 115 based on Foata normal form. 2/5480 useless extension candidates. Maximal degree in co-relation 68083. Up to 3839 conditions per place. [2023-11-17 16:12:03,806 INFO L140 encePairwiseOnDemand]: 889/899 looper letters, 1179 selfloop transitions, 632 changer transitions 6/1819 dead transitions. [2023-11-17 16:12:03,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 1819 transitions, 52411 flow [2023-11-17 16:12:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 16:12:03,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 16:12:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 9903 transitions. [2023-11-17 16:12:03,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3239874370215272 [2023-11-17 16:12:03,938 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 9903 transitions. [2023-11-17 16:12:03,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 9903 transitions. [2023-11-17 16:12:03,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:03,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 9903 transitions. [2023-11-17 16:12:03,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 291.2647058823529) internal successors, (9903), 34 states have internal predecessors, (9903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:03,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 899.0) internal successors, (31465), 35 states have internal predecessors, (31465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:03,958 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 899.0) internal successors, (31465), 35 states have internal predecessors, (31465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:03,959 INFO L175 Difference]: Start difference. First operand has 572 places, 1711 transitions, 46471 flow. Second operand 34 states and 9903 transitions. [2023-11-17 16:12:03,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 1819 transitions, 52411 flow [2023-11-17 16:12:05,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 1819 transitions, 51802 flow, removed 255 selfloop flow, removed 22 redundant places. [2023-11-17 16:12:05,711 INFO L231 Difference]: Finished difference. Result has 587 places, 1769 transitions, 49437 flow [2023-11-17 16:12:05,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=45942, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=578, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=49437, PETRI_PLACES=587, PETRI_TRANSITIONS=1769} [2023-11-17 16:12:05,713 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 565 predicate places. [2023-11-17 16:12:05,713 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 1769 transitions, 49437 flow [2023-11-17 16:12:05,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 288.6363636363636) internal successors, (9525), 33 states have internal predecessors, (9525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:05,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:05,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:05,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 16:12:05,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:05,920 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:12:05,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash 924252948, now seen corresponding path program 26 times [2023-11-17 16:12:05,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:05,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499131735] [2023-11-17 16:12:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:05,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:08,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:08,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499131735] [2023-11-17 16:12:08,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499131735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:08,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278706624] [2023-11-17 16:12:08,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:12:08,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:08,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:08,600 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:12:08,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 16:12:08,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:12:08,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:08,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 16:12:08,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:09,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:09,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 104 [2023-11-17 16:12:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:09,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:11,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:11,381 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 478 treesize of output 194 [2023-11-17 16:12:13,887 INFO L349 Elim1Store]: treesize reduction 5, result has 86.5 percent of original size [2023-11-17 16:12:13,887 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 948 treesize of output 347 [2023-11-17 16:12:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:12:16,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278706624] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:16,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:16,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 31 [2023-11-17 16:12:16,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983378955] [2023-11-17 16:12:16,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:16,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:12:16,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:16,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:12:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:12:16,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 899 [2023-11-17 16:12:16,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 1769 transitions, 49437 flow. Second operand has 32 states, 32 states have (on average 288.65625) internal successors, (9237), 32 states have internal predecessors, (9237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:16,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:16,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 899 [2023-11-17 16:12:16,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:20,574 INFO L124 PetriNetUnfolderBase]: 3378/5592 cut-off events. [2023-11-17 16:12:20,575 INFO L125 PetriNetUnfolderBase]: For 92640/92640 co-relation queries the response was YES. [2023-11-17 16:12:20,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71182 conditions, 5592 events. 3378/5592 cut-off events. For 92640/92640 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 34961 event pairs, 113 based on Foata normal form. 1/5593 useless extension candidates. Maximal degree in co-relation 71085. Up to 4295 conditions per place. [2023-11-17 16:12:20,644 INFO L140 encePairwiseOnDemand]: 889/899 looper letters, 1261 selfloop transitions, 589 changer transitions 5/1857 dead transitions. [2023-11-17 16:12:20,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1857 transitions, 54916 flow [2023-11-17 16:12:20,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 16:12:20,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 16:12:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 9031 transitions. [2023-11-17 16:12:20,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3240518138433385 [2023-11-17 16:12:20,650 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 9031 transitions. [2023-11-17 16:12:20,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 9031 transitions. [2023-11-17 16:12:20,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:20,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 9031 transitions. [2023-11-17 16:12:20,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 291.3225806451613) internal successors, (9031), 31 states have internal predecessors, (9031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:20,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 899.0) internal successors, (28768), 32 states have internal predecessors, (28768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:20,670 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 899.0) internal successors, (28768), 32 states have internal predecessors, (28768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:20,670 INFO L175 Difference]: Start difference. First operand has 587 places, 1769 transitions, 49437 flow. Second operand 31 states and 9031 transitions. [2023-11-17 16:12:20,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1857 transitions, 54916 flow [2023-11-17 16:12:22,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1857 transitions, 54568 flow, removed 113 selfloop flow, removed 18 redundant places. [2023-11-17 16:12:23,031 INFO L231 Difference]: Finished difference. Result has 604 places, 1814 transitions, 51887 flow [2023-11-17 16:12:23,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=49093, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=51887, PETRI_PLACES=604, PETRI_TRANSITIONS=1814} [2023-11-17 16:12:23,033 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 582 predicate places. [2023-11-17 16:12:23,033 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1814 transitions, 51887 flow [2023-11-17 16:12:23,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 288.65625) internal successors, (9237), 32 states have internal predecessors, (9237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:23,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:23,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:23,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 16:12:23,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:23,235 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:12:23,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:23,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1138859580, now seen corresponding path program 27 times [2023-11-17 16:12:23,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:23,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391523857] [2023-11-17 16:12:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:23,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:24,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:24,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391523857] [2023-11-17 16:12:24,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391523857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:24,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934158111] [2023-11-17 16:12:24,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:12:24,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:24,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:24,707 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:12:24,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 16:12:24,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:12:24,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:24,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 16:12:24,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:25,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:25,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 84 [2023-11-17 16:12:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:25,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:28,370 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-17 16:12:28,370 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 1822 treesize of output 694 Received shutdown request... [2023-11-17 16:12:31,434 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:12:31,434 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:12:31,445 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:12:31,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-17 16:12:31,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:31,653 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 23 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-15-4-4-5-2-8-2-6-2-8-2-9-1 context. [2023-11-17 16:12:31,655 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:12:31,655 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:12:31,655 INFO L445 BasicCegarLoop]: Path program histogram: [27, 1, 1, 1, 1, 1] [2023-11-17 16:12:31,658 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:12:31,658 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:12:31,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:12:31 BasicIcfg [2023-11-17 16:12:31,660 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:12:31,660 INFO L158 Benchmark]: Toolchain (without parser) took 491683.61ms. Allocated memory was 209.7MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 166.8MB in the beginning and 410.8MB in the end (delta: -244.0MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2023-11-17 16:12:31,661 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 209.7MB. Free memory is still 168.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:12:31,661 INFO L158 Benchmark]: CACSL2BoogieTranslator took 317.38ms. Allocated memory is still 209.7MB. Free memory was 166.8MB in the beginning and 154.6MB in the end (delta: 12.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:12:31,661 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.18ms. Allocated memory is still 209.7MB. Free memory was 154.6MB in the beginning and 151.8MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 16:12:31,661 INFO L158 Benchmark]: Boogie Preprocessor took 39.63ms. Allocated memory is still 209.7MB. Free memory was 151.8MB in the beginning and 149.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:12:31,662 INFO L158 Benchmark]: RCFGBuilder took 594.17ms. Allocated memory is still 209.7MB. Free memory was 149.7MB in the beginning and 184.5MB in the end (delta: -34.8MB). Peak memory consumption was 34.4MB. Max. memory is 8.0GB. [2023-11-17 16:12:31,662 INFO L158 Benchmark]: TraceAbstraction took 490664.95ms. Allocated memory was 209.7MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 184.0MB in the beginning and 410.8MB in the end (delta: -226.8MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2023-11-17 16:12:31,663 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 209.7MB. Free memory is still 168.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 317.38ms. Allocated memory is still 209.7MB. Free memory was 166.8MB in the beginning and 154.6MB in the end (delta: 12.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 61.18ms. Allocated memory is still 209.7MB. Free memory was 154.6MB in the beginning and 151.8MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.63ms. Allocated memory is still 209.7MB. Free memory was 151.8MB in the beginning and 149.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 594.17ms. Allocated memory is still 209.7MB. Free memory was 149.7MB in the beginning and 184.5MB in the end (delta: -34.8MB). Peak memory consumption was 34.4MB. Max. memory is 8.0GB. * TraceAbstraction took 490664.95ms. Allocated memory was 209.7MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 184.0MB in the beginning and 410.8MB in the end (delta: -226.8MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.1s, 373 PlacesBefore, 22 PlacesAfterwards, 394 TransitionsBefore, 18 TransitionsAfterwards, 38252 CoEnabledTransitionPairs, 9 FixpointIterations, 112 TrivialSequentialCompositions, 251 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 87 ConcurrentYvCompositions, 25 ChoiceCompositions, 494 TotalNumberOfCompositions, 32873 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 32147, independent: 32116, independent conditional: 0, independent unconditional: 32116, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 28461, independent: 28441, independent conditional: 0, independent unconditional: 28441, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 28461, independent: 28441, independent conditional: 0, independent unconditional: 28441, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 20, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 60, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 32147, independent: 3675, independent conditional: 0, independent unconditional: 3675, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 28461, unknown conditional: 0, unknown unconditional: 28461] , Statistics on independence cache: Total cache size (in pairs): 32, Positive cache size: 29, Positive conditional cache size: 0, Positive unconditional cache size: 29, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 23 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-15-4-4-5-2-8-2-6-2-8-2-9-1 context. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 23 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-15-4-4-5-2-8-2-6-2-8-2-9-1 context. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 23 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-15-4-4-5-2-8-2-6-2-8-2-9-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 622 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 490.5s, OverallIterations: 32, TraceHistogramMax: 2, PathProgramHistogramMax: 27, EmptinessCheckTime: 0.0s, AutomataDifference: 261.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.3s, HoareTripleCheckerStatistics: 84 mSolverCounterUnknown, 3166 SdHoareTripleChecker+Valid, 23.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3166 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 20.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 147 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1291 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20279 IncrementalHoareTripleChecker+Invalid, 21801 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1291 mSolverCounterUnsat, 0 mSDtfsCounter, 20279 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1862 GetRequests, 699 SyntacticMatches, 18 SemanticMatches, 1145 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 22465 ImplicationChecksByTransitivity, 234.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51887occurred in iteration=31, InterpolantAutomatonStates: 851, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 199.9s InterpolantComputationTime, 1167 NumberOfCodeBlocks, 1167 NumberOfCodeBlocksAsserted, 91 NumberOfCheckSat, 1641 ConstructedInterpolants, 31 QuantifiedInterpolants, 154280 SizeOfPredicates, 862 NumberOfNonLiveVariables, 5469 ConjunctsInSsa, 780 ConjunctsInUnsatCore, 87 InterpolantComputations, 5 PerfectInterpolantSequences, 126/563 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown