/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:11:00,615 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:11:00,678 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 16:11:00,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:11:00,702 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:11:00,702 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:11:00,703 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:11:00,703 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:11:00,703 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:11:00,706 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:11:00,706 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:11:00,706 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:11:00,707 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:11:00,708 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:11:00,708 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:11:00,708 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:11:00,708 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:11:00,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:11:00,708 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:11:00,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:11:00,708 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:11:00,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:11:00,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:11:00,709 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:11:00,709 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:11:00,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:11:00,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:11:00,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:11:00,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:11:00,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:11:00,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:11:00,712 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:11:00,712 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:11:00,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:11:00,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:11:00,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:11:00,941 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:11:00,942 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:11:00,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-11-17 16:11:01,890 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:11:02,040 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:11:02,040 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-11-17 16:11:02,045 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e5717873/07524641aa69474cbe64edf5f4add6ca/FLAG6ddce14f5 [2023-11-17 16:11:02,054 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e5717873/07524641aa69474cbe64edf5f4add6ca [2023-11-17 16:11:02,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:11:02,057 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:11:02,057 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:11:02,057 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:11:02,060 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:11:02,061 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13611845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02, skipping insertion in model container [2023-11-17 16:11:02,061 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,078 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:11:02,175 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2973,2986] [2023-11-17 16:11:02,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:11:02,187 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:11:02,200 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2973,2986] [2023-11-17 16:11:02,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:11:02,212 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:11:02,212 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:11:02,218 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:11:02,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02 WrapperNode [2023-11-17 16:11:02,218 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:11:02,219 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:11:02,219 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:11:02,219 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:11:02,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,238 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,264 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 157 [2023-11-17 16:11:02,264 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:11:02,265 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:11:02,265 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:11:02,265 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:11:02,271 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,282 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,283 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,290 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,294 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,294 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,296 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:11:02,296 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:11:02,297 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:11:02,297 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:11:02,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (1/1) ... [2023-11-17 16:11:02,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:11:02,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:02,325 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 16:11:02,332 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 16:11:02,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:11:02,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:11:02,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:11:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:11:02,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:11:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:11:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:11:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:11:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:11:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:11:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:11:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:11:02,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:11:02,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:11:02,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:11:02,350 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 16:11:02,414 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:11:02,416 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:11:02,637 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:11:02,694 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:11:02,695 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 16:11:02,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:11:02 BoogieIcfgContainer [2023-11-17 16:11:02,696 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:11:02,697 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:11:02,697 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:11:02,699 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:11:02,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:11:02" (1/3) ... [2023-11-17 16:11:02,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e76c122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:11:02, skipping insertion in model container [2023-11-17 16:11:02,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:11:02" (2/3) ... [2023-11-17 16:11:02,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e76c122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:11:02, skipping insertion in model container [2023-11-17 16:11:02,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:11:02" (3/3) ... [2023-11-17 16:11:02,701 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-11-17 16:11:02,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:11:02,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:11:02,713 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:11:02,764 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:11:02,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 145 transitions, 304 flow [2023-11-17 16:11:02,852 INFO L124 PetriNetUnfolderBase]: 11/143 cut-off events. [2023-11-17 16:11:02,852 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:11:02,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 143 events. 11/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-11-17 16:11:02,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 145 transitions, 304 flow [2023-11-17 16:11:02,861 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 134 transitions, 280 flow [2023-11-17 16:11:02,864 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:11:02,878 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 134 transitions, 280 flow [2023-11-17 16:11:02,881 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 134 transitions, 280 flow [2023-11-17 16:11:02,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 134 transitions, 280 flow [2023-11-17 16:11:02,914 INFO L124 PetriNetUnfolderBase]: 11/134 cut-off events. [2023-11-17 16:11:02,915 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:11:02,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 133 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-11-17 16:11:02,916 INFO L119 LiptonReduction]: Number of co-enabled transitions 1458 [2023-11-17 16:11:06,286 INFO L134 LiptonReduction]: Checked pairs total: 1555 [2023-11-17 16:11:06,287 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-11-17 16:11:06,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:11:06,302 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;@1494fe92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:11:06,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:11:06,305 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:11:06,305 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-17 16:11:06,305 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:11:06,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:06,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:06,306 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 16:11:06,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1142347665, now seen corresponding path program 1 times [2023-11-17 16:11:06,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:06,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863067755] [2023-11-17 16:11:06,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:06,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:06,546 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 16:11:06,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:06,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863067755] [2023-11-17 16:11:06,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863067755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:11:06,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:11:06,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:11:06,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978307957] [2023-11-17 16:11:06,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:11:06,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:11:06,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:06,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:11:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:11:06,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 281 [2023-11-17 16:11:06,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:06,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:06,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 281 [2023-11-17 16:11:06,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:06,653 INFO L124 PetriNetUnfolderBase]: 91/164 cut-off events. [2023-11-17 16:11:06,653 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-17 16:11:06,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 164 events. 91/164 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 452 event pairs, 33 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 280. Up to 85 conditions per place. [2023-11-17 16:11:06,656 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 24 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-17 16:11:06,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 141 flow [2023-11-17 16:11:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:11:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:11:06,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-11-17 16:11:06,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816132858837485 [2023-11-17 16:11:06,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-11-17 16:11:06,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-11-17 16:11:06,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:06,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-11-17 16:11:06,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:06,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:06,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:06,692 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 406 transitions. [2023-11-17 16:11:06,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 141 flow [2023-11-17 16:11:06,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 30 transitions, 127 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:11:06,696 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2023-11-17 16:11:06,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-11-17 16:11:06,700 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-17 16:11:06,700 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2023-11-17 16:11:06,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:06,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:06,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:06,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:11:06,702 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 16:11:06,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:06,703 INFO L85 PathProgramCache]: Analyzing trace with hash -209414774, now seen corresponding path program 1 times [2023-11-17 16:11:06,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:06,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173022650] [2023-11-17 16:11:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:06,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:06,836 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 16:11:06,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:06,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173022650] [2023-11-17 16:11:06,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173022650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:11:06,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:11:06,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:11:06,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861195222] [2023-11-17 16:11:06,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:11:06,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:11:06,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:06,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:11:06,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:11:06,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 281 [2023-11-17 16:11:06,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:06,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:06,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 281 [2023-11-17 16:11:06,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:06,896 INFO L124 PetriNetUnfolderBase]: 115/221 cut-off events. [2023-11-17 16:11:06,896 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-17 16:11:06,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 221 events. 115/221 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 695 event pairs, 88 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 291. Up to 165 conditions per place. [2023-11-17 16:11:06,897 INFO L140 encePairwiseOnDemand]: 276/281 looper letters, 18 selfloop transitions, 2 changer transitions 12/32 dead transitions. [2023-11-17 16:11:06,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 32 transitions, 146 flow [2023-11-17 16:11:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:11:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:11:06,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 477 transitions. [2023-11-17 16:11:06,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42437722419928825 [2023-11-17 16:11:06,899 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 477 transitions. [2023-11-17 16:11:06,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 477 transitions. [2023-11-17 16:11:06,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:06,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 477 transitions. [2023-11-17 16:11:06,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:06,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:06,902 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:06,902 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 4 states and 477 transitions. [2023-11-17 16:11:06,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 32 transitions, 146 flow [2023-11-17 16:11:06,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:11:06,904 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 66 flow [2023-11-17 16:11:06,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=66, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-11-17 16:11:06,904 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-17 16:11:06,904 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 66 flow [2023-11-17 16:11:06,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:06,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:06,905 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 16:11:06,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:11:06,905 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 16:11:06,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:06,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1352789047, now seen corresponding path program 1 times [2023-11-17 16:11:06,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:06,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457599780] [2023-11-17 16:11:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:06,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:07,055 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 16:11:07,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:07,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457599780] [2023-11-17 16:11:07,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457599780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:11:07,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:11:07,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:11:07,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602009065] [2023-11-17 16:11:07,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:11:07,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:11:07,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:07,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:11:07,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:11:07,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 281 [2023-11-17 16:11:07,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:07,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:07,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 281 [2023-11-17 16:11:07,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:07,118 INFO L124 PetriNetUnfolderBase]: 83/156 cut-off events. [2023-11-17 16:11:07,118 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 16:11:07,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 156 events. 83/156 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 418 event pairs, 12 based on Foata normal form. 8/163 useless extension candidates. Maximal degree in co-relation 357. Up to 98 conditions per place. [2023-11-17 16:11:07,119 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 24 selfloop transitions, 4 changer transitions 6/34 dead transitions. [2023-11-17 16:11:07,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 169 flow [2023-11-17 16:11:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:11:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:11:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 497 transitions. [2023-11-17 16:11:07,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44217081850533807 [2023-11-17 16:11:07,121 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 497 transitions. [2023-11-17 16:11:07,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 497 transitions. [2023-11-17 16:11:07,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:07,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 497 transitions. [2023-11-17 16:11:07,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:07,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:07,124 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:07,124 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 66 flow. Second operand 4 states and 497 transitions. [2023-11-17 16:11:07,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 169 flow [2023-11-17 16:11:07,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 165 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:11:07,126 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 91 flow [2023-11-17 16:11:07,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-11-17 16:11:07,127 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2023-11-17 16:11:07,127 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 91 flow [2023-11-17 16:11:07,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:07,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:07,128 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 16:11:07,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:11:07,128 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 16:11:07,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:07,129 INFO L85 PathProgramCache]: Analyzing trace with hash 467952154, now seen corresponding path program 1 times [2023-11-17 16:11:07,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:07,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332539231] [2023-11-17 16:11:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:07,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:11:07,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:07,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332539231] [2023-11-17 16:11:07,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332539231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:07,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14769820] [2023-11-17 16:11:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:07,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:07,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:07,330 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 16:11:07,348 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 16:11:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:07,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:11:07,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:07,520 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 66 treesize of output 50 [2023-11-17 16:11:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:11:07,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:07,603 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 12 treesize of output 4 [2023-11-17 16:11:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:11:07,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14769820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:07,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:07,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-17 16:11:07,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138190127] [2023-11-17 16:11:07,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:07,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 16:11:07,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:07,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 16:11:07,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:11:07,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 281 [2023-11-17 16:11:07,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 91 flow. Second operand has 9 states, 9 states have (on average 120.0) internal successors, (1080), 9 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:07,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:07,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 281 [2023-11-17 16:11:07,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:07,773 INFO L124 PetriNetUnfolderBase]: 107/206 cut-off events. [2023-11-17 16:11:07,773 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 16:11:07,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 206 events. 107/206 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 654 event pairs, 6 based on Foata normal form. 8/213 useless extension candidates. Maximal degree in co-relation 537. Up to 47 conditions per place. [2023-11-17 16:11:07,776 INFO L140 encePairwiseOnDemand]: 275/281 looper letters, 22 selfloop transitions, 6 changer transitions 26/54 dead transitions. [2023-11-17 16:11:07,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 284 flow [2023-11-17 16:11:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:11:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:11:07,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 982 transitions. [2023-11-17 16:11:07,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43683274021352314 [2023-11-17 16:11:07,778 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 982 transitions. [2023-11-17 16:11:07,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 982 transitions. [2023-11-17 16:11:07,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:07,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 982 transitions. [2023-11-17 16:11:07,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.75) internal successors, (982), 8 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:07,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:07,784 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:07,784 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 91 flow. Second operand 8 states and 982 transitions. [2023-11-17 16:11:07,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 284 flow [2023-11-17 16:11:07,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 54 transitions, 280 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 16:11:07,787 INFO L231 Difference]: Finished difference. Result has 36 places, 21 transitions, 90 flow [2023-11-17 16:11:07,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=90, PETRI_PLACES=36, PETRI_TRANSITIONS=21} [2023-11-17 16:11:07,789 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-11-17 16:11:07,789 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 21 transitions, 90 flow [2023-11-17 16:11:07,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 120.0) internal successors, (1080), 9 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:07,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:07,790 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 16:11:07,798 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 16:11:07,995 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 16:11:07,996 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 16:11:07,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:07,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2115653976, now seen corresponding path program 2 times [2023-11-17 16:11:07,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:07,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153686429] [2023-11-17 16:11:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:08,745 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 16:11:08,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:08,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153686429] [2023-11-17 16:11:08,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153686429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:08,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104233383] [2023-11-17 16:11:08,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:11:08,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:08,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:08,749 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 16:11:08,772 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 16:11:08,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:11:08,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:08,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 16:11:08,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:08,866 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 23 treesize of output 1 [2023-11-17 16:11:08,897 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 16:11:08,920 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 16:11:09,065 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 16:11:09,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:09,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:09,591 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 63 treesize of output 51 [2023-11-17 16:11:09,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:09,605 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 152 treesize of output 144 [2023-11-17 16:11:09,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:09,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 116 [2023-11-17 16:11:09,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:09,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 79 [2023-11-17 16:11:09,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:09,827 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 62 treesize of output 50 [2023-11-17 16:11:09,836 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 16:11:09,836 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 148 treesize of output 136 [2023-11-17 16:11:09,848 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 16:11:09,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 112 [2023-11-17 16:11:09,859 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 16:11:09,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2023-11-17 16:11:09,915 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-11-17 16:11:09,985 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 16:11:09,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104233383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:09,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:09,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-11-17 16:11:09,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122078521] [2023-11-17 16:11:09,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:09,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 16:11:09,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 16:11:09,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=580, Unknown=1, NotChecked=0, Total=702 [2023-11-17 16:11:09,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 281 [2023-11-17 16:11:09,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 21 transitions, 90 flow. Second operand has 27 states, 27 states have (on average 74.81481481481481) internal successors, (2020), 27 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:09,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:09,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 281 [2023-11-17 16:11:09,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:11,314 INFO L124 PetriNetUnfolderBase]: 157/312 cut-off events. [2023-11-17 16:11:11,315 INFO L125 PetriNetUnfolderBase]: For 314/314 co-relation queries the response was YES. [2023-11-17 16:11:11,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 312 events. 157/312 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1114 event pairs, 6 based on Foata normal form. 22/330 useless extension candidates. Maximal degree in co-relation 717. Up to 71 conditions per place. [2023-11-17 16:11:11,316 INFO L140 encePairwiseOnDemand]: 270/281 looper letters, 46 selfloop transitions, 26 changer transitions 35/107 dead transitions. [2023-11-17 16:11:11,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 107 transitions, 619 flow [2023-11-17 16:11:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:11:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:11:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2011 transitions. [2023-11-17 16:11:11,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2752532165343553 [2023-11-17 16:11:11,321 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2011 transitions. [2023-11-17 16:11:11,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2011 transitions. [2023-11-17 16:11:11,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:11,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2011 transitions. [2023-11-17 16:11:11,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 77.34615384615384) internal successors, (2011), 26 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:11,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 281.0) internal successors, (7587), 27 states have internal predecessors, (7587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:11,332 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 281.0) internal successors, (7587), 27 states have internal predecessors, (7587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:11,332 INFO L175 Difference]: Start difference. First operand has 36 places, 21 transitions, 90 flow. Second operand 26 states and 2011 transitions. [2023-11-17 16:11:11,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 107 transitions, 619 flow [2023-11-17 16:11:11,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 107 transitions, 552 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-11-17 16:11:11,335 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 284 flow [2023-11-17 16:11:11,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=284, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-11-17 16:11:11,336 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2023-11-17 16:11:11,336 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 284 flow [2023-11-17 16:11:11,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 74.81481481481481) internal successors, (2020), 27 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:11,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:11,337 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 16:11:11,344 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 16:11:11,544 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 16:11:11,544 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 16:11:11,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:11,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1084396168, now seen corresponding path program 3 times [2023-11-17 16:11:11,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:11,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663087142] [2023-11-17 16:11:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:11,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:11,776 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 16:11:11,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:11,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663087142] [2023-11-17 16:11:11,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663087142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:11,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266775478] [2023-11-17 16:11:11,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:11:11,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:11,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:11,780 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 16:11:11,793 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 16:11:11,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:11:11,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:11,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:11:11,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:11,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:11,903 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 27 treesize of output 9 [2023-11-17 16:11:11,923 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 16:11:11,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:12,013 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 16:11:12,014 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 125 treesize of output 93 [2023-11-17 16:11:12,066 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 16:11:12,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266775478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:12,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:12,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-11-17 16:11:12,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495224857] [2023-11-17 16:11:12,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:12,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:11:12,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:12,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:11:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:11:12,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 281 [2023-11-17 16:11:12,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 284 flow. Second operand has 17 states, 17 states have (on average 105.82352941176471) internal successors, (1799), 17 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 16:11:12,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:12,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 281 [2023-11-17 16:11:12,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:12,515 INFO L124 PetriNetUnfolderBase]: 377/665 cut-off events. [2023-11-17 16:11:12,516 INFO L125 PetriNetUnfolderBase]: For 3813/3813 co-relation queries the response was YES. [2023-11-17 16:11:12,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3360 conditions, 665 events. 377/665 cut-off events. For 3813/3813 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2717 event pairs, 20 based on Foata normal form. 24/687 useless extension candidates. Maximal degree in co-relation 2474. Up to 217 conditions per place. [2023-11-17 16:11:12,520 INFO L140 encePairwiseOnDemand]: 274/281 looper letters, 87 selfloop transitions, 66 changer transitions 1/154 dead transitions. [2023-11-17 16:11:12,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 154 transitions, 1457 flow [2023-11-17 16:11:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 16:11:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 16:11:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2489 transitions. [2023-11-17 16:11:12,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3851152715457218 [2023-11-17 16:11:12,525 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2489 transitions. [2023-11-17 16:11:12,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2489 transitions. [2023-11-17 16:11:12,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:12,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2489 transitions. [2023-11-17 16:11:12,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 108.21739130434783) internal successors, (2489), 23 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:12,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 281.0) internal successors, (6744), 24 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:12,535 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 281.0) internal successors, (6744), 24 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:12,535 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 284 flow. Second operand 23 states and 2489 transitions. [2023-11-17 16:11:12,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 154 transitions, 1457 flow [2023-11-17 16:11:12,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 154 transitions, 1231 flow, removed 111 selfloop flow, removed 5 redundant places. [2023-11-17 16:11:12,542 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 932 flow [2023-11-17 16:11:12,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=932, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2023-11-17 16:11:12,542 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 55 predicate places. [2023-11-17 16:11:12,543 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 932 flow [2023-11-17 16:11:12,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 105.82352941176471) internal successors, (1799), 17 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 16:11:12,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:12,543 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:12,550 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 16:11:12,748 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 16:11:12,749 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 16:11:12,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:12,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1514059941, now seen corresponding path program 4 times [2023-11-17 16:11:12,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:12,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492825427] [2023-11-17 16:11:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:12,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:13,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:13,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492825427] [2023-11-17 16:11:13,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492825427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:13,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255241007] [2023-11-17 16:11:13,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:11:13,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:13,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:13,637 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 16:11:13,641 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 16:11:13,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:11:13,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:13,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 16:11:13,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:13,966 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 11 treesize of output 3 [2023-11-17 16:11:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:13,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:14,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:14,162 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 104 treesize of output 80 [2023-11-17 16:11:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:14,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255241007] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:14,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:14,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-11-17 16:11:14,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123530402] [2023-11-17 16:11:14,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:14,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:11:14,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:14,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:11:14,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 16:11:14,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 281 [2023-11-17 16:11:14,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 932 flow. Second operand has 34 states, 34 states have (on average 82.70588235294117) internal successors, (2812), 34 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:14,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:14,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 281 [2023-11-17 16:11:14,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:15,684 INFO L124 PetriNetUnfolderBase]: 793/1382 cut-off events. [2023-11-17 16:11:15,684 INFO L125 PetriNetUnfolderBase]: For 8466/8466 co-relation queries the response was YES. [2023-11-17 16:11:15,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7291 conditions, 1382 events. 793/1382 cut-off events. For 8466/8466 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6732 event pairs, 74 based on Foata normal form. 7/1387 useless extension candidates. Maximal degree in co-relation 1847. Up to 437 conditions per place. [2023-11-17 16:11:15,693 INFO L140 encePairwiseOnDemand]: 270/281 looper letters, 141 selfloop transitions, 98 changer transitions 24/263 dead transitions. [2023-11-17 16:11:15,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 263 transitions, 3144 flow [2023-11-17 16:11:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:11:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:11:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2723 transitions. [2023-11-17 16:11:15,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30282473309608543 [2023-11-17 16:11:15,698 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2723 transitions. [2023-11-17 16:11:15,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2723 transitions. [2023-11-17 16:11:15,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:15,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2723 transitions. [2023-11-17 16:11:15,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 85.09375) internal successors, (2723), 32 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:15,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 281.0) internal successors, (9273), 33 states have internal predecessors, (9273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:15,712 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 281.0) internal successors, (9273), 33 states have internal predecessors, (9273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:15,712 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 932 flow. Second operand 32 states and 2723 transitions. [2023-11-17 16:11:15,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 263 transitions, 3144 flow [2023-11-17 16:11:15,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 263 transitions, 2125 flow, removed 495 selfloop flow, removed 6 redundant places. [2023-11-17 16:11:15,728 INFO L231 Difference]: Finished difference. Result has 110 places, 154 transitions, 1406 flow [2023-11-17 16:11:15,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1406, PETRI_PLACES=110, PETRI_TRANSITIONS=154} [2023-11-17 16:11:15,728 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 88 predicate places. [2023-11-17 16:11:15,728 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 154 transitions, 1406 flow [2023-11-17 16:11:15,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.70588235294117) internal successors, (2812), 34 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:15,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:15,729 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 16:11:15,736 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 16:11:15,936 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 16:11:15,937 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 16:11:15,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:15,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1148357033, now seen corresponding path program 5 times [2023-11-17 16:11:15,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:15,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137151964] [2023-11-17 16:11:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:15,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:16,703 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 16:11:16,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:16,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137151964] [2023-11-17 16:11:16,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137151964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:16,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525156178] [2023-11-17 16:11:16,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:11:16,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:16,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:16,705 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 16:11:16,707 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 16:11:16,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:11:16,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:16,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 16:11:16,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:17,169 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 16:11:17,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:17,529 INFO L349 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-11-17 16:11:17,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 118 [2023-11-17 16:11:17,693 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 16:11:17,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525156178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:17,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:17,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 33 [2023-11-17 16:11:17,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774516446] [2023-11-17 16:11:17,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:17,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:11:17,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:17,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:11:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:11:17,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 281 [2023-11-17 16:11:17,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 154 transitions, 1406 flow. Second operand has 35 states, 35 states have (on average 82.77142857142857) internal successors, (2897), 35 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:17,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:17,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 281 [2023-11-17 16:11:17,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:20,507 INFO L124 PetriNetUnfolderBase]: 1649/2852 cut-off events. [2023-11-17 16:11:20,507 INFO L125 PetriNetUnfolderBase]: For 13548/13548 co-relation queries the response was YES. [2023-11-17 16:11:20,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13669 conditions, 2852 events. 1649/2852 cut-off events. For 13548/13548 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16285 event pairs, 58 based on Foata normal form. 37/2888 useless extension candidates. Maximal degree in co-relation 12915. Up to 731 conditions per place. [2023-11-17 16:11:20,524 INFO L140 encePairwiseOnDemand]: 271/281 looper letters, 182 selfloop transitions, 214 changer transitions 70/466 dead transitions. [2023-11-17 16:11:20,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 466 transitions, 4828 flow [2023-11-17 16:11:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 16:11:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 16:11:20,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4034 transitions. [2023-11-17 16:11:20,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30544408268342543 [2023-11-17 16:11:20,530 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4034 transitions. [2023-11-17 16:11:20,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4034 transitions. [2023-11-17 16:11:20,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:20,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4034 transitions. [2023-11-17 16:11:20,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 85.82978723404256) internal successors, (4034), 47 states have internal predecessors, (4034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:20,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 281.0) internal successors, (13488), 48 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:20,547 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 281.0) internal successors, (13488), 48 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:20,547 INFO L175 Difference]: Start difference. First operand has 110 places, 154 transitions, 1406 flow. Second operand 47 states and 4034 transitions. [2023-11-17 16:11:20,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 466 transitions, 4828 flow [2023-11-17 16:11:20,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 466 transitions, 4330 flow, removed 207 selfloop flow, removed 8 redundant places. [2023-11-17 16:11:20,615 INFO L231 Difference]: Finished difference. Result has 178 places, 279 transitions, 3191 flow [2023-11-17 16:11:20,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3191, PETRI_PLACES=178, PETRI_TRANSITIONS=279} [2023-11-17 16:11:20,615 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 156 predicate places. [2023-11-17 16:11:20,616 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 279 transitions, 3191 flow [2023-11-17 16:11:20,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 82.77142857142857) internal successors, (2897), 35 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:20,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:20,617 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 16:11:20,630 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 16:11:20,821 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 16:11:20,821 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 16:11:20,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:20,822 INFO L85 PathProgramCache]: Analyzing trace with hash -800880527, now seen corresponding path program 6 times [2023-11-17 16:11:20,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:20,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772369720] [2023-11-17 16:11:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:20,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:21,400 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 16:11:21,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:21,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772369720] [2023-11-17 16:11:21,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772369720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:21,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532214549] [2023-11-17 16:11:21,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:11:21,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:21,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:21,402 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 16:11:21,424 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 16:11:21,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:11:21,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:21,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-17 16:11:21,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:21,567 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 16:11:21,616 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 16:11:21,650 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 16:11:21,927 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:11:21,927 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:11:21,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:21,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 21 [2023-11-17 16:11:21,974 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 16:11:21,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:22,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:22,757 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 123 treesize of output 87 [2023-11-17 16:11:22,785 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-17 16:11:22,785 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 266 treesize of output 258 [2023-11-17 16:11:22,812 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-17 16:11:22,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 232 treesize of output 206 [2023-11-17 16:11:22,840 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-17 16:11:22,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 153 treesize of output 153 [2023-11-17 16:11:23,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:23,495 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 124 treesize of output 88 [2023-11-17 16:11:23,518 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-11-17 16:11:23,519 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 570 treesize of output 510 [2023-11-17 16:11:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:11:23,530 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:11:23,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:11:23,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 154 [2023-11-17 16:11:23,547 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-11-17 16:11:23,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 179 treesize of output 135 [2023-11-17 16:11:23,705 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 16:11:23,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532214549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:23,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:23,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 36 [2023-11-17 16:11:23,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182828831] [2023-11-17 16:11:23,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:23,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 16:11:23,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:23,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 16:11:23,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1191, Unknown=3, NotChecked=0, Total=1406 [2023-11-17 16:11:23,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 281 [2023-11-17 16:11:23,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 279 transitions, 3191 flow. Second operand has 38 states, 38 states have (on average 74.63157894736842) internal successors, (2836), 38 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:23,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:23,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 281 [2023-11-17 16:11:23,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:27,937 INFO L124 PetriNetUnfolderBase]: 2679/4548 cut-off events. [2023-11-17 16:11:27,937 INFO L125 PetriNetUnfolderBase]: For 35191/35191 co-relation queries the response was YES. [2023-11-17 16:11:27,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25899 conditions, 4548 events. 2679/4548 cut-off events. For 35191/35191 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27707 event pairs, 190 based on Foata normal form. 25/4573 useless extension candidates. Maximal degree in co-relation 25811. Up to 1221 conditions per place. [2023-11-17 16:11:27,975 INFO L140 encePairwiseOnDemand]: 271/281 looper letters, 293 selfloop transitions, 372 changer transitions 48/713 dead transitions. [2023-11-17 16:11:27,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 713 transitions, 9284 flow [2023-11-17 16:11:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-17 16:11:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-11-17 16:11:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4191 transitions. [2023-11-17 16:11:27,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27619612495057333 [2023-11-17 16:11:27,979 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4191 transitions. [2023-11-17 16:11:27,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4191 transitions. [2023-11-17 16:11:27,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:27,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4191 transitions. [2023-11-17 16:11:27,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 77.61111111111111) internal successors, (4191), 54 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:27,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 281.0) internal successors, (15455), 55 states have internal predecessors, (15455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:27,996 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 281.0) internal successors, (15455), 55 states have internal predecessors, (15455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:27,996 INFO L175 Difference]: Start difference. First operand has 178 places, 279 transitions, 3191 flow. Second operand 54 states and 4191 transitions. [2023-11-17 16:11:27,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 713 transitions, 9284 flow [2023-11-17 16:11:28,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 713 transitions, 8031 flow, removed 599 selfloop flow, removed 14 redundant places. [2023-11-17 16:11:28,281 INFO L231 Difference]: Finished difference. Result has 236 places, 490 transitions, 6277 flow [2023-11-17 16:11:28,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=2719, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=6277, PETRI_PLACES=236, PETRI_TRANSITIONS=490} [2023-11-17 16:11:28,282 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 214 predicate places. [2023-11-17 16:11:28,282 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 490 transitions, 6277 flow [2023-11-17 16:11:28,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 74.63157894736842) internal successors, (2836), 38 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:28,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:28,283 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:28,288 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 16:11:28,487 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 16:11:28,488 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 16:11:28,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:28,488 INFO L85 PathProgramCache]: Analyzing trace with hash -578141149, now seen corresponding path program 7 times [2023-11-17 16:11:28,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:28,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192163546] [2023-11-17 16:11:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:28,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:11:28,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:28,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192163546] [2023-11-17 16:11:28,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192163546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:28,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928733038] [2023-11-17 16:11:28,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:11:28,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:28,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:28,633 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 16:11:28,656 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 16:11:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:28,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:11:28,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:11:28,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:11:28,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928733038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:28,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:28,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-17 16:11:28,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348355535] [2023-11-17 16:11:28,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:28,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:11:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:11:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:11:28,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 281 [2023-11-17 16:11:28,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 490 transitions, 6277 flow. Second operand has 21 states, 21 states have (on average 104.95238095238095) internal successors, (2204), 21 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:28,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:28,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 281 [2023-11-17 16:11:28,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:29,508 INFO L124 PetriNetUnfolderBase]: 1631/2921 cut-off events. [2023-11-17 16:11:29,509 INFO L125 PetriNetUnfolderBase]: For 43021/43021 co-relation queries the response was YES. [2023-11-17 16:11:29,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18144 conditions, 2921 events. 1631/2921 cut-off events. For 43021/43021 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 17941 event pairs, 602 based on Foata normal form. 216/3137 useless extension candidates. Maximal degree in co-relation 18046. Up to 1694 conditions per place. [2023-11-17 16:11:29,528 INFO L140 encePairwiseOnDemand]: 276/281 looper letters, 179 selfloop transitions, 4 changer transitions 175/358 dead transitions. [2023-11-17 16:11:29,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 358 transitions, 5512 flow [2023-11-17 16:11:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:11:29,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:11:29,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1077 transitions. [2023-11-17 16:11:29,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38327402135231314 [2023-11-17 16:11:29,537 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1077 transitions. [2023-11-17 16:11:29,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1077 transitions. [2023-11-17 16:11:29,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:29,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1077 transitions. [2023-11-17 16:11:29,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 107.7) internal successors, (1077), 10 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:29,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 281.0) internal successors, (3091), 11 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:29,543 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 281.0) internal successors, (3091), 11 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:29,543 INFO L175 Difference]: Start difference. First operand has 236 places, 490 transitions, 6277 flow. Second operand 10 states and 1077 transitions. [2023-11-17 16:11:29,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 358 transitions, 5512 flow [2023-11-17 16:11:29,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 358 transitions, 4804 flow, removed 256 selfloop flow, removed 21 redundant places. [2023-11-17 16:11:29,716 INFO L231 Difference]: Finished difference. Result has 213 places, 183 transitions, 2082 flow [2023-11-17 16:11:29,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2082, PETRI_PLACES=213, PETRI_TRANSITIONS=183} [2023-11-17 16:11:29,717 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 191 predicate places. [2023-11-17 16:11:29,717 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 183 transitions, 2082 flow [2023-11-17 16:11:29,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 104.95238095238095) internal successors, (2204), 21 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:29,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:29,718 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:29,725 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 16:11:29,918 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 16:11:29,918 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 16:11:29,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:29,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1292296074, now seen corresponding path program 8 times [2023-11-17 16:11:29,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:29,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090645127] [2023-11-17 16:11:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:29,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:30,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:30,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090645127] [2023-11-17 16:11:30,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090645127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:30,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727306500] [2023-11-17 16:11:30,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:11:30,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:30,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:30,973 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 16:11:30,984 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 16:11:31,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:11:31,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:31,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 16:11:31,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:31,270 INFO L349 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2023-11-17 16:11:31,270 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 50 treesize of output 21 [2023-11-17 16:11:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:11:31,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:31,636 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-17 16:11:31,637 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 174 treesize of output 136 [2023-11-17 16:11:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:31,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727306500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:31,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:31,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 30 [2023-11-17 16:11:31,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301164052] [2023-11-17 16:11:31,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:31,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:11:31,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:11:31,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:11:31,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 281 [2023-11-17 16:11:31,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 183 transitions, 2082 flow. Second operand has 32 states, 32 states have (on average 82.96875) internal successors, (2655), 32 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:31,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:31,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 281 [2023-11-17 16:11:31,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:33,633 INFO L124 PetriNetUnfolderBase]: 1873/3188 cut-off events. [2023-11-17 16:11:33,633 INFO L125 PetriNetUnfolderBase]: For 40456/40456 co-relation queries the response was YES. [2023-11-17 16:11:33,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19318 conditions, 3188 events. 1873/3188 cut-off events. For 40456/40456 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 18794 event pairs, 120 based on Foata normal form. 22/3210 useless extension candidates. Maximal degree in co-relation 19240. Up to 796 conditions per place. [2023-11-17 16:11:33,652 INFO L140 encePairwiseOnDemand]: 271/281 looper letters, 163 selfloop transitions, 254 changer transitions 68/485 dead transitions. [2023-11-17 16:11:33,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 485 transitions, 6386 flow [2023-11-17 16:11:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 16:11:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 16:11:33,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3774 transitions. [2023-11-17 16:11:33,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30524102232287287 [2023-11-17 16:11:33,656 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3774 transitions. [2023-11-17 16:11:33,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3774 transitions. [2023-11-17 16:11:33,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:33,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3774 transitions. [2023-11-17 16:11:33,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 85.77272727272727) internal successors, (3774), 44 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:33,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 281.0) internal successors, (12645), 45 states have internal predecessors, (12645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:33,666 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 281.0) internal successors, (12645), 45 states have internal predecessors, (12645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:33,666 INFO L175 Difference]: Start difference. First operand has 213 places, 183 transitions, 2082 flow. Second operand 44 states and 3774 transitions. [2023-11-17 16:11:33,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 485 transitions, 6386 flow [2023-11-17 16:11:33,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 485 transitions, 5406 flow, removed 453 selfloop flow, removed 43 redundant places. [2023-11-17 16:11:33,768 INFO L231 Difference]: Finished difference. Result has 171 places, 302 transitions, 4189 flow [2023-11-17 16:11:33,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4189, PETRI_PLACES=171, PETRI_TRANSITIONS=302} [2023-11-17 16:11:33,769 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 149 predicate places. [2023-11-17 16:11:33,769 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 302 transitions, 4189 flow [2023-11-17 16:11:33,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 82.96875) internal successors, (2655), 32 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:33,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:33,770 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:33,774 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 16:11:33,970 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 16:11:33,970 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 16:11:33,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:33,971 INFO L85 PathProgramCache]: Analyzing trace with hash 774434307, now seen corresponding path program 9 times [2023-11-17 16:11:33,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:33,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145434517] [2023-11-17 16:11:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:33,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:34,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:34,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145434517] [2023-11-17 16:11:34,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145434517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:34,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833385156] [2023-11-17 16:11:34,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:11:34,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:34,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:34,104 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 16:11:34,132 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 16:11:34,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:11:34,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:34,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:11:34,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:34,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:34,300 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 27 treesize of output 9 [2023-11-17 16:11:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:34,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:34,434 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 16:11:34,437 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 127 treesize of output 95 [2023-11-17 16:11:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:34,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833385156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:34,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:34,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 14 [2023-11-17 16:11:34,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889432936] [2023-11-17 16:11:34,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:34,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:11:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:34,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:11:34,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:11:34,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 281 [2023-11-17 16:11:34,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 302 transitions, 4189 flow. Second operand has 15 states, 15 states have (on average 106.0) internal successors, (1590), 15 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:34,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:34,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 281 [2023-11-17 16:11:34,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:35,074 INFO L124 PetriNetUnfolderBase]: 1921/3326 cut-off events. [2023-11-17 16:11:35,074 INFO L125 PetriNetUnfolderBase]: For 24922/24922 co-relation queries the response was YES. [2023-11-17 16:11:35,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20119 conditions, 3326 events. 1921/3326 cut-off events. For 24922/24922 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19799 event pairs, 76 based on Foata normal form. 96/3422 useless extension candidates. Maximal degree in co-relation 20032. Up to 1316 conditions per place. [2023-11-17 16:11:35,094 INFO L140 encePairwiseOnDemand]: 274/281 looper letters, 145 selfloop transitions, 220 changer transitions 19/384 dead transitions. [2023-11-17 16:11:35,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 384 transitions, 5656 flow [2023-11-17 16:11:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:11:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:11:35,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2060 transitions. [2023-11-17 16:11:35,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858400449522382 [2023-11-17 16:11:35,097 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2060 transitions. [2023-11-17 16:11:35,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2060 transitions. [2023-11-17 16:11:35,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:35,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2060 transitions. [2023-11-17 16:11:35,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 108.42105263157895) internal successors, (2060), 19 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:35,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 281.0) internal successors, (5620), 20 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:35,102 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 281.0) internal successors, (5620), 20 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:35,102 INFO L175 Difference]: Start difference. First operand has 171 places, 302 transitions, 4189 flow. Second operand 19 states and 2060 transitions. [2023-11-17 16:11:35,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 384 transitions, 5656 flow [2023-11-17 16:11:35,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 384 transitions, 5105 flow, removed 176 selfloop flow, removed 22 redundant places. [2023-11-17 16:11:35,223 INFO L231 Difference]: Finished difference. Result has 169 places, 301 transitions, 4480 flow [2023-11-17 16:11:35,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4480, PETRI_PLACES=169, PETRI_TRANSITIONS=301} [2023-11-17 16:11:35,223 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 147 predicate places. [2023-11-17 16:11:35,223 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 301 transitions, 4480 flow [2023-11-17 16:11:35,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.0) internal successors, (1590), 15 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:35,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:35,224 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:35,231 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 16:11:35,429 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 16:11:35,429 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:11:35,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:35,429 INFO L85 PathProgramCache]: Analyzing trace with hash -106142256, now seen corresponding path program 10 times [2023-11-17 16:11:35,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:35,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590324461] [2023-11-17 16:11:35,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:35,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:11:35,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:35,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590324461] [2023-11-17 16:11:35,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590324461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:35,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324660813] [2023-11-17 16:11:35,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:11:35,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:35,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:35,623 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 16:11:35,653 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 16:11:35,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:11:35,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:35,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:11:35,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:35,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:35,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 92 [2023-11-17 16:11:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:11:35,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:36,139 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-11-17 16:11:36,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 115 [2023-11-17 16:11:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:11:36,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324660813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:36,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:36,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-11-17 16:11:36,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443010697] [2023-11-17 16:11:36,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:36,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:11:36,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:36,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:11:36,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:11:36,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 281 [2023-11-17 16:11:36,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 301 transitions, 4480 flow. Second operand has 25 states, 25 states have (on average 95.88) internal successors, (2397), 25 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:36,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:36,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 281 [2023-11-17 16:11:36,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:36,761 INFO L124 PetriNetUnfolderBase]: 1775/3124 cut-off events. [2023-11-17 16:11:36,761 INFO L125 PetriNetUnfolderBase]: For 25736/25736 co-relation queries the response was YES. [2023-11-17 16:11:36,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20012 conditions, 3124 events. 1775/3124 cut-off events. For 25736/25736 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18212 event pairs, 990 based on Foata normal form. 76/3200 useless extension candidates. Maximal degree in co-relation 19493. Up to 2674 conditions per place. [2023-11-17 16:11:36,780 INFO L140 encePairwiseOnDemand]: 276/281 looper letters, 312 selfloop transitions, 20 changer transitions 3/335 dead transitions. [2023-11-17 16:11:36,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 335 transitions, 5499 flow [2023-11-17 16:11:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:11:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:11:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1087 transitions. [2023-11-17 16:11:36,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35166612746683923 [2023-11-17 16:11:36,782 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1087 transitions. [2023-11-17 16:11:36,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1087 transitions. [2023-11-17 16:11:36,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:36,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1087 transitions. [2023-11-17 16:11:36,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 98.81818181818181) internal successors, (1087), 11 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:36,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 281.0) internal successors, (3372), 12 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:36,785 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 281.0) internal successors, (3372), 12 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:36,785 INFO L175 Difference]: Start difference. First operand has 169 places, 301 transitions, 4480 flow. Second operand 11 states and 1087 transitions. [2023-11-17 16:11:36,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 335 transitions, 5499 flow [2023-11-17 16:11:36,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 335 transitions, 5189 flow, removed 141 selfloop flow, removed 7 redundant places. [2023-11-17 16:11:36,915 INFO L231 Difference]: Finished difference. Result has 168 places, 287 transitions, 4071 flow [2023-11-17 16:11:36,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4071, PETRI_PLACES=168, PETRI_TRANSITIONS=287} [2023-11-17 16:11:36,916 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 146 predicate places. [2023-11-17 16:11:36,916 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 287 transitions, 4071 flow [2023-11-17 16:11:36,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 95.88) internal successors, (2397), 25 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:36,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:36,916 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:36,927 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 16:11:37,121 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 16:11:37,121 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 16:11:37,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:37,122 INFO L85 PathProgramCache]: Analyzing trace with hash 470924105, now seen corresponding path program 11 times [2023-11-17 16:11:37,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:37,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264907105] [2023-11-17 16:11:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:37,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:11:37,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:37,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264907105] [2023-11-17 16:11:37,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264907105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:37,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091734967] [2023-11-17 16:11:37,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:11:37,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:37,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:37,277 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 16:11:37,280 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 16:11:37,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:11:37,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:37,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 16:11:37,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:37,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:37,495 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 53 treesize of output 17 [2023-11-17 16:11:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:11:37,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:37,807 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-17 16:11:37,808 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 183 treesize of output 115 [2023-11-17 16:11:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:11:37,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091734967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:37,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:37,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 20 [2023-11-17 16:11:37,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774199151] [2023-11-17 16:11:37,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:37,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:11:37,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:37,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:11:37,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:11:37,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 281 [2023-11-17 16:11:37,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 287 transitions, 4071 flow. Second operand has 21 states, 21 states have (on average 105.85714285714286) internal successors, (2223), 21 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:37,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:37,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 281 [2023-11-17 16:11:37,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:39,192 INFO L124 PetriNetUnfolderBase]: 2865/5000 cut-off events. [2023-11-17 16:11:39,193 INFO L125 PetriNetUnfolderBase]: For 38066/38066 co-relation queries the response was YES. [2023-11-17 16:11:39,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30411 conditions, 5000 events. 2865/5000 cut-off events. For 38066/38066 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 30727 event pairs, 122 based on Foata normal form. 76/5076 useless extension candidates. Maximal degree in co-relation 29222. Up to 1109 conditions per place. [2023-11-17 16:11:39,225 INFO L140 encePairwiseOnDemand]: 274/281 looper letters, 354 selfloop transitions, 383 changer transitions 1/738 dead transitions. [2023-11-17 16:11:39,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 738 transitions, 10411 flow [2023-11-17 16:11:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 16:11:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 16:11:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5116 transitions. [2023-11-17 16:11:39,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3873703339138336 [2023-11-17 16:11:39,230 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5116 transitions. [2023-11-17 16:11:39,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5116 transitions. [2023-11-17 16:11:39,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:39,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5116 transitions. [2023-11-17 16:11:39,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 108.85106382978724) internal successors, (5116), 47 states have internal predecessors, (5116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:39,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 281.0) internal successors, (13488), 48 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:39,242 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 281.0) internal successors, (13488), 48 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:39,243 INFO L175 Difference]: Start difference. First operand has 168 places, 287 transitions, 4071 flow. Second operand 47 states and 5116 transitions. [2023-11-17 16:11:39,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 738 transitions, 10411 flow [2023-11-17 16:11:39,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 738 transitions, 10368 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-11-17 16:11:39,398 INFO L231 Difference]: Finished difference. Result has 224 places, 477 transitions, 7876 flow [2023-11-17 16:11:39,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=3964, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=7876, PETRI_PLACES=224, PETRI_TRANSITIONS=477} [2023-11-17 16:11:39,399 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 202 predicate places. [2023-11-17 16:11:39,399 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 477 transitions, 7876 flow [2023-11-17 16:11:39,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 105.85714285714286) internal successors, (2223), 21 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:39,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:39,399 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:39,405 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 16:11:39,599 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 16:11:39,600 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 16:11:39,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:39,600 INFO L85 PathProgramCache]: Analyzing trace with hash 159896678, now seen corresponding path program 12 times [2023-11-17 16:11:39,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:39,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103817422] [2023-11-17 16:11:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:39,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:40,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:40,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103817422] [2023-11-17 16:11:40,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103817422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:40,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093428735] [2023-11-17 16:11:40,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:11:40,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:40,754 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 16:11:40,754 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 16:11:40,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:11:40,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:40,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-17 16:11:40,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:41,465 INFO L349 Elim1Store]: treesize reduction 62, result has 10.1 percent of original size [2023-11-17 16:11:41,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 26 [2023-11-17 16:11:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:41,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:44,022 INFO L349 Elim1Store]: treesize reduction 36, result has 93.3 percent of original size [2023-11-17 16:11:44,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 357 treesize of output 715 [2023-11-17 16:17:21,734 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-17 16:17:21,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-11-17 16:17:21,736 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-17 16:17:21,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-17 16:17:21,936 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 16:17:21,937 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 78 more [2023-11-17 16:17:21,939 INFO L158 Benchmark]: Toolchain (without parser) took 379882.76ms. Allocated memory was 183.5MB in the beginning and 792.7MB in the end (delta: 609.2MB). Free memory was 126.4MB in the beginning and 532.2MB in the end (delta: -405.9MB). Peak memory consumption was 533.6MB. Max. memory is 8.0GB. [2023-11-17 16:17:21,939 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory was 134.9MB in the beginning and 134.7MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:17:21,940 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.13ms. Allocated memory is still 183.5MB. Free memory was 126.4MB in the beginning and 114.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-11-17 16:17:21,940 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.16ms. Allocated memory is still 183.5MB. Free memory was 114.3MB in the beginning and 112.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:17:21,940 INFO L158 Benchmark]: Boogie Preprocessor took 31.32ms. Allocated memory is still 183.5MB. Free memory was 112.2MB in the beginning and 110.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 16:17:21,940 INFO L158 Benchmark]: RCFGBuilder took 399.53ms. Allocated memory is still 183.5MB. Free memory was 110.6MB in the beginning and 88.6MB in the end (delta: 22.0MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. [2023-11-17 16:17:21,940 INFO L158 Benchmark]: TraceAbstraction took 379241.68ms. Allocated memory was 183.5MB in the beginning and 792.7MB in the end (delta: 609.2MB). Free memory was 88.1MB in the beginning and 532.2MB in the end (delta: -444.2MB). Peak memory consumption was 494.9MB. Max. memory is 8.0GB. [2023-11-17 16:17:21,941 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory was 134.9MB in the beginning and 134.7MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 161.13ms. Allocated memory is still 183.5MB. Free memory was 126.4MB in the beginning and 114.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 45.16ms. Allocated memory is still 183.5MB. Free memory was 114.3MB in the beginning and 112.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.32ms. Allocated memory is still 183.5MB. Free memory was 112.2MB in the beginning and 110.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 399.53ms. Allocated memory is still 183.5MB. Free memory was 110.6MB in the beginning and 88.6MB in the end (delta: 22.0MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. * TraceAbstraction took 379241.68ms. Allocated memory was 183.5MB in the beginning and 792.7MB in the end (delta: 609.2MB). Free memory was 88.1MB in the beginning and 532.2MB in the end (delta: -444.2MB). Peak memory consumption was 494.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 130 PlacesBefore, 22 PlacesAfterwards, 134 TransitionsBefore, 18 TransitionsAfterwards, 1458 CoEnabledTransitionPairs, 7 FixpointIterations, 72 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 11 ConcurrentYvCompositions, 8 ChoiceCompositions, 136 TotalNumberOfCompositions, 1555 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1448, independent: 1427, independent conditional: 0, independent unconditional: 1427, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1044, independent: 1033, independent conditional: 0, independent unconditional: 1033, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1044, independent: 1033, independent conditional: 0, independent unconditional: 1033, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 11, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 32, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1448, independent: 394, independent conditional: 0, independent unconditional: 394, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 1044, unknown conditional: 0, unknown unconditional: 1044] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 31, Positive conditional cache size: 0, Positive unconditional cache size: 31, 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 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...