/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 16:20:48,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 16:20:48,635 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-VariableLbe.epf [2023-08-24 16:20:48,638 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 16:20:48,638 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 16:20:48,663 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 16:20:48,663 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 16:20:48,664 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 16:20:48,664 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 16:20:48,668 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 16:20:48,668 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 16:20:48,668 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 16:20:48,668 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 16:20:48,669 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 16:20:48,669 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 16:20:48,670 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 16:20:48,670 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 16:20:48,670 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 16:20:48,670 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 16:20:48,670 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 16:20:48,670 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 16:20:48,671 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 16:20:48,671 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 16:20:48,672 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 16:20:48,672 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 16:20:48,672 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 16:20:48,672 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 16:20:48,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:20:48,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 16:20:48,673 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 16:20:48,673 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 16:20:48,673 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 16:20:48,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 16:20:48,674 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 16:20:48,674 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 16:20:48,674 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 16:20:48,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 16:20:48,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 16:20:48,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 16:20:48,959 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 16:20:48,960 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 16:20:48,961 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-24 16:20:49,964 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 16:20:50,122 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 16:20:50,122 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-24 16:20:50,128 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c103f32f/3f70b36275764419afe5410be58a44b1/FLAG80b223c1c [2023-08-24 16:20:50,510 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c103f32f/3f70b36275764419afe5410be58a44b1 [2023-08-24 16:20:50,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 16:20:50,513 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 16:20:50,513 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 16:20:50,513 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 16:20:50,515 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 16:20:50,516 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,516 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10954420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50, skipping insertion in model container [2023-08-24 16:20:50,516 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,535 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 16:20:50,649 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-send-receive-alt.wvr.c[2650,2663] [2023-08-24 16:20:50,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:20:50,667 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 16:20:50,695 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-send-receive-alt.wvr.c[2650,2663] [2023-08-24 16:20:50,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:20:50,706 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 16:20:50,707 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 16:20:50,711 INFO L206 MainTranslator]: Completed translation [2023-08-24 16:20:50,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50 WrapperNode [2023-08-24 16:20:50,713 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 16:20:50,714 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 16:20:50,714 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 16:20:50,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 16:20:50,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,731 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,756 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 148 [2023-08-24 16:20:50,757 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 16:20:50,758 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 16:20:50,758 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 16:20:50,758 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 16:20:50,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,776 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,777 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,783 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,786 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,787 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,787 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,789 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 16:20:50,789 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 16:20:50,790 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 16:20:50,790 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 16:20:50,790 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (1/1) ... [2023-08-24 16:20:50,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:20:50,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:20:50,838 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) [2023-08-24 16:20:50,844 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 [2023-08-24 16:20:50,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 16:20:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 16:20:50,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 16:20:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 16:20:50,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 16:20:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 16:20:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 16:20:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 16:20:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 16:20:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 16:20:50,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 16:20:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 16:20:50,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 16:20:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 16:20:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 16:20:50,867 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 16:20:50,952 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 16:20:50,953 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 16:20:51,127 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 16:20:51,190 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 16:20:51,190 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 16:20:51,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:20:51 BoogieIcfgContainer [2023-08-24 16:20:51,191 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 16:20:51,193 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 16:20:51,193 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 16:20:51,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 16:20:51,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 04:20:50" (1/3) ... [2023-08-24 16:20:51,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35758405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:20:51, skipping insertion in model container [2023-08-24 16:20:51,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:20:50" (2/3) ... [2023-08-24 16:20:51,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35758405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:20:51, skipping insertion in model container [2023-08-24 16:20:51,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:20:51" (3/3) ... [2023-08-24 16:20:51,196 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-08-24 16:20:51,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 16:20:51,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 16:20:51,209 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 16:20:51,253 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 16:20:51,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 272 flow [2023-08-24 16:20:51,319 INFO L124 PetriNetUnfolderBase]: 11/126 cut-off events. [2023-08-24 16:20:51,319 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:20:51,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 11/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-24 16:20:51,323 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 128 transitions, 272 flow [2023-08-24 16:20:51,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 118 transitions, 248 flow [2023-08-24 16:20:51,328 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 16:20:51,334 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 118 transitions, 248 flow [2023-08-24 16:20:51,335 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 118 transitions, 248 flow [2023-08-24 16:20:51,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 118 transitions, 248 flow [2023-08-24 16:20:51,368 INFO L124 PetriNetUnfolderBase]: 11/118 cut-off events. [2023-08-24 16:20:51,369 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:20:51,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 11/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-24 16:20:51,370 INFO L119 LiptonReduction]: Number of co-enabled transitions 792 [2023-08-24 16:20:54,794 INFO L134 LiptonReduction]: Checked pairs total: 860 [2023-08-24 16:20:54,794 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-24 16:20:54,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 16:20:54,807 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=LoopsAndPotentialCycles, 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;@5d61888d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 16:20:54,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 16:20:54,811 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 16:20:54,811 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-08-24 16:20:54,811 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:20:54,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:20:54,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:20:54,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:20:54,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:20:54,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1271432657, now seen corresponding path program 1 times [2023-08-24 16:20:54,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:20:54,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312579606] [2023-08-24 16:20:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:20:54,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:20:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:20:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:20:55,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:20:55,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312579606] [2023-08-24 16:20:55,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312579606] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:20:55,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:20:55,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 16:20:55,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386626323] [2023-08-24 16:20:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:20:55,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 16:20:55,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:20:55,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 16:20:55,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 16:20:55,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 252 [2023-08-24 16:20:55,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:20:55,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 252 [2023-08-24 16:20:55,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:20:55,228 INFO L124 PetriNetUnfolderBase]: 64/113 cut-off events. [2023-08-24 16:20:55,229 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-24 16:20:55,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 329 event pairs, 13 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2023-08-24 16:20:55,230 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2023-08-24 16:20:55,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2023-08-24 16:20:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 16:20:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 16:20:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-24 16:20:55,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748677248677249 [2023-08-24 16:20:55,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-24 16:20:55,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-24 16:20:55,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:20:55,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-24 16:20:55,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,253 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 359 transitions. [2023-08-24 16:20:55,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2023-08-24 16:20:55,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 16:20:55,256 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2023-08-24 16:20:55,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-08-24 16:20:55,259 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-24 16:20:55,259 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2023-08-24 16:20:55,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:20:55,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:20:55,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 16:20:55,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:20:55,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:20:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1087178636, now seen corresponding path program 1 times [2023-08-24 16:20:55,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:20:55,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505704098] [2023-08-24 16:20:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:20:55,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:20:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:20:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:20:55,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:20:55,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505704098] [2023-08-24 16:20:55,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505704098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:20:55,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:20:55,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 16:20:55,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569282550] [2023-08-24 16:20:55,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:20:55,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 16:20:55,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:20:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 16:20:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 16:20:55,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 252 [2023-08-24 16:20:55,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:20:55,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 252 [2023-08-24 16:20:55,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:20:55,381 INFO L124 PetriNetUnfolderBase]: 48/96 cut-off events. [2023-08-24 16:20:55,381 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-24 16:20:55,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 231 event pairs, 15 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2023-08-24 16:20:55,382 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2023-08-24 16:20:55,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2023-08-24 16:20:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 16:20:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 16:20:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-24 16:20:55,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2023-08-24 16:20:55,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-24 16:20:55,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-24 16:20:55,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:20:55,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-24 16:20:55,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,388 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,388 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 338 transitions. [2023-08-24 16:20:55,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2023-08-24 16:20:55,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 16:20:55,389 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2023-08-24 16:20:55,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-24 16:20:55,389 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-08-24 16:20:55,390 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2023-08-24 16:20:55,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:20:55,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:20:55,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 16:20:55,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:20:55,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:20:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1050120391, now seen corresponding path program 1 times [2023-08-24 16:20:55,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:20:55,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109638353] [2023-08-24 16:20:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:20:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:20:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:20:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:20:55,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:20:55,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109638353] [2023-08-24 16:20:55,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109638353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:20:55,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:20:55,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 16:20:55,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843185771] [2023-08-24 16:20:55,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:20:55,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:20:55,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:20:55,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:20:55,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 16:20:55,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 252 [2023-08-24 16:20:55,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:20:55,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 252 [2023-08-24 16:20:55,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:20:55,504 INFO L124 PetriNetUnfolderBase]: 57/126 cut-off events. [2023-08-24 16:20:55,504 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-24 16:20:55,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 390 event pairs, 40 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2023-08-24 16:20:55,505 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-08-24 16:20:55,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2023-08-24 16:20:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:20:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:20:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-08-24 16:20:55,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117063492063492 [2023-08-24 16:20:55,507 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-08-24 16:20:55,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-08-24 16:20:55,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:20:55,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-08-24 16:20:55,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,510 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,510 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 415 transitions. [2023-08-24 16:20:55,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2023-08-24 16:20:55,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 16:20:55,511 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2023-08-24 16:20:55,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-08-24 16:20:55,512 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-24 16:20:55,512 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2023-08-24 16:20:55,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:55,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:20:55,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:20:55,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 16:20:55,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:20:55,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:20:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash -278733434, now seen corresponding path program 1 times [2023-08-24 16:20:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:20:55,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436850691] [2023-08-24 16:20:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:20:55,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:20:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:20:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:20:55,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:20:55,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436850691] [2023-08-24 16:20:55,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436850691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:20:55,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702983491] [2023-08-24 16:20:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:20:55,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:20:55,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:20:55,922 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) [2023-08-24 16:20:55,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 16:20:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:20:56,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 16:20:56,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:20:56,110 INFO L351 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 11 [2023-08-24 16:20:56,151 INFO L351 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 6 treesize of output 5 [2023-08-24 16:20:56,182 INFO L351 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 6 treesize of output 5 [2023-08-24 16:20:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:20:56,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:20:56,581 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~back~0) (let ((.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ c_~sum~0 (select .cse0 .cse1)) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse3 .cse2) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse1)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-08-24 16:20:56,603 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:20:56,603 INFO L351 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 [2023-08-24 16:20:56,617 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:20:56,618 INFO L351 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 316 treesize of output 292 [2023-08-24 16:20:56,631 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:20:56,631 INFO L351 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 96 treesize of output 92 [2023-08-24 16:20:56,641 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:20:56,641 INFO L351 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 95 treesize of output 79 [2023-08-24 16:20:56,785 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:20:56,786 INFO L351 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 [2023-08-24 16:20:56,793 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 16:20:56,793 INFO L351 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 [2023-08-24 16:20:56,803 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 16:20:56,803 INFO L351 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 [2023-08-24 16:20:56,814 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 16:20:56,815 INFO L351 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 [2023-08-24 16:20:56,850 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 16:20:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 16:20:56,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702983491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:20:56,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:20:56,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 16:20:56,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175525270] [2023-08-24 16:20:56,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:20:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 16:20:56,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:20:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 16:20:56,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=332, Unknown=3, NotChecked=38, Total=462 [2023-08-24 16:20:56,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 16:20:56,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:56,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:20:56,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 16:20:56,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:20:58,343 INFO L124 PetriNetUnfolderBase]: 261/507 cut-off events. [2023-08-24 16:20:58,343 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2023-08-24 16:20:58,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222 conditions, 507 events. 261/507 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2265 event pairs, 30 based on Foata normal form. 5/508 useless extension candidates. Maximal degree in co-relation 1206. Up to 114 conditions per place. [2023-08-24 16:20:58,348 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 58 selfloop transitions, 29 changer transitions 58/145 dead transitions. [2023-08-24 16:20:58,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 145 transitions, 713 flow [2023-08-24 16:20:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 16:20:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 16:20:58,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1758 transitions. [2023-08-24 16:20:58,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3033126293995859 [2023-08-24 16:20:58,354 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1758 transitions. [2023-08-24 16:20:58,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1758 transitions. [2023-08-24 16:20:58,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:20:58,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1758 transitions. [2023-08-24 16:20:58,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 76.43478260869566) internal successors, (1758), 23 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:58,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 252.0) internal successors, (6048), 24 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:58,372 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 252.0) internal successors, (6048), 24 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:58,373 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 23 states and 1758 transitions. [2023-08-24 16:20:58,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 145 transitions, 713 flow [2023-08-24 16:20:58,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 145 transitions, 701 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 16:20:58,382 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 285 flow [2023-08-24 16:20:58,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=285, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-24 16:20:58,383 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-08-24 16:20:58,384 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 285 flow [2023-08-24 16:20:58,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:58,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:20:58,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:20:58,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 16:20:58,590 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 [2023-08-24 16:20:58,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:20:58,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:20:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1005614065, now seen corresponding path program 2 times [2023-08-24 16:20:58,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:20:58,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114395714] [2023-08-24 16:20:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:20:58,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:20:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:20:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:20:58,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:20:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114395714] [2023-08-24 16:20:58,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114395714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:20:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695133533] [2023-08-24 16:20:58,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:20:58,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:20:58,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:20:58,758 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) [2023-08-24 16:20:58,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 16:20:58,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:20:58,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:20:58,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 16:20:58,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:20:58,867 INFO L351 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 118 treesize of output 86 [2023-08-24 16:20:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:20:58,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:20:58,940 INFO L351 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 128 treesize of output 96 [2023-08-24 16:20:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:20:58,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695133533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:20:58,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:20:58,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 11 [2023-08-24 16:20:58,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325559003] [2023-08-24 16:20:58,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:20:58,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 16:20:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:20:58,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 16:20:58,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-08-24 16:20:58,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 252 [2023-08-24 16:20:58,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 285 flow. Second operand has 12 states, 12 states have (on average 96.16666666666667) internal successors, (1154), 12 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:58,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:20:58,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 252 [2023-08-24 16:20:58,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:20:59,108 INFO L124 PetriNetUnfolderBase]: 357/707 cut-off events. [2023-08-24 16:20:59,108 INFO L125 PetriNetUnfolderBase]: For 1305/1307 co-relation queries the response was YES. [2023-08-24 16:20:59,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 707 events. 357/707 cut-off events. For 1305/1307 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3549 event pairs, 80 based on Foata normal form. 24/713 useless extension candidates. Maximal degree in co-relation 1935. Up to 181 conditions per place. [2023-08-24 16:20:59,111 INFO L140 encePairwiseOnDemand]: 247/252 looper letters, 57 selfloop transitions, 23 changer transitions 5/89 dead transitions. [2023-08-24 16:20:59,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 656 flow [2023-08-24 16:20:59,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 16:20:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 16:20:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 901 transitions. [2023-08-24 16:20:59,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972663139329806 [2023-08-24 16:20:59,113 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 901 transitions. [2023-08-24 16:20:59,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 901 transitions. [2023-08-24 16:20:59,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:20:59,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 901 transitions. [2023-08-24 16:20:59,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 100.11111111111111) internal successors, (901), 9 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:59,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:59,117 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:59,117 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 285 flow. Second operand 9 states and 901 transitions. [2023-08-24 16:20:59,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 656 flow [2023-08-24 16:20:59,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 608 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-08-24 16:20:59,122 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 367 flow [2023-08-24 16:20:59,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=367, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-08-24 16:20:59,122 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2023-08-24 16:20:59,122 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 367 flow [2023-08-24 16:20:59,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.16666666666667) internal successors, (1154), 12 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:59,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:20:59,123 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:20:59,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 16:20:59,333 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 [2023-08-24 16:20:59,333 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:20:59,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:20:59,333 INFO L85 PathProgramCache]: Analyzing trace with hash -210133493, now seen corresponding path program 3 times [2023-08-24 16:20:59,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:20:59,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541876501] [2023-08-24 16:20:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:20:59,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:20:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:20:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:20:59,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:20:59,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541876501] [2023-08-24 16:20:59,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541876501] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:20:59,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582899496] [2023-08-24 16:20:59,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:20:59,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:20:59,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:20:59,482 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) [2023-08-24 16:20:59,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 16:20:59,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:20:59,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:20:59,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 16:20:59,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:20:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:20:59,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:20:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:20:59,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582899496] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:20:59,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:20:59,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-24 16:20:59,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888582722] [2023-08-24 16:20:59,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:20:59,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 16:20:59,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:20:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 16:20:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-24 16:20:59,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 252 [2023-08-24 16:20:59,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 367 flow. Second operand has 16 states, 16 states have (on average 95.6875) internal successors, (1531), 16 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:20:59,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:20:59,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 252 [2023-08-24 16:20:59,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:21:00,040 INFO L124 PetriNetUnfolderBase]: 229/473 cut-off events. [2023-08-24 16:21:00,041 INFO L125 PetriNetUnfolderBase]: For 1004/1006 co-relation queries the response was YES. [2023-08-24 16:21:00,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1575 conditions, 473 events. 229/473 cut-off events. For 1004/1006 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2205 event pairs, 148 based on Foata normal form. 12/468 useless extension candidates. Maximal degree in co-relation 1536. Up to 389 conditions per place. [2023-08-24 16:21:00,043 INFO L140 encePairwiseOnDemand]: 247/252 looper letters, 32 selfloop transitions, 3 changer transitions 25/63 dead transitions. [2023-08-24 16:21:00,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 451 flow [2023-08-24 16:21:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 16:21:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 16:21:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 694 transitions. [2023-08-24 16:21:00,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3934240362811791 [2023-08-24 16:21:00,047 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 694 transitions. [2023-08-24 16:21:00,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 694 transitions. [2023-08-24 16:21:00,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:21:00,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 694 transitions. [2023-08-24 16:21:00,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.14285714285714) internal successors, (694), 7 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:00,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:00,052 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:00,052 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 367 flow. Second operand 7 states and 694 transitions. [2023-08-24 16:21:00,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 451 flow [2023-08-24 16:21:00,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 416 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-24 16:21:00,055 INFO L231 Difference]: Finished difference. Result has 52 places, 38 transitions, 228 flow [2023-08-24 16:21:00,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2023-08-24 16:21:00,057 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-08-24 16:21:00,058 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 228 flow [2023-08-24 16:21:00,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 95.6875) internal successors, (1531), 16 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:00,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:21:00,059 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:21:00,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 16:21:00,262 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 [2023-08-24 16:21:00,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:21:00,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:21:00,263 INFO L85 PathProgramCache]: Analyzing trace with hash 794494887, now seen corresponding path program 4 times [2023-08-24 16:21:00,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:21:00,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473947724] [2023-08-24 16:21:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:21:00,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:21:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:21:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:21:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473947724] [2023-08-24 16:21:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473947724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:21:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396601901] [2023-08-24 16:21:00,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:21:00,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:21:00,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:21:00,973 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) [2023-08-24 16:21:01,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 16:21:01,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:21:01,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:21:01,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 16:21:01,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:21:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:01,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:21:01,650 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 16:21:01,651 INFO L351 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 216 treesize of output 170 [2023-08-24 16:21:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:02,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396601901] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:21:02,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:21:02,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 25 [2023-08-24 16:21:02,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278778541] [2023-08-24 16:21:02,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:21:02,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 16:21:02,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:21:02,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 16:21:02,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2023-08-24 16:21:02,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 16:21:02,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 38 transitions, 228 flow. Second operand has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:02,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:21:02,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 16:21:02,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:21:02,815 INFO L124 PetriNetUnfolderBase]: 364/719 cut-off events. [2023-08-24 16:21:02,815 INFO L125 PetriNetUnfolderBase]: For 823/823 co-relation queries the response was YES. [2023-08-24 16:21:02,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 719 events. 364/719 cut-off events. For 823/823 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3539 event pairs, 65 based on Foata normal form. 26/744 useless extension candidates. Maximal degree in co-relation 2134. Up to 186 conditions per place. [2023-08-24 16:21:02,817 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 67 selfloop transitions, 26 changer transitions 55/148 dead transitions. [2023-08-24 16:21:02,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 148 transitions, 903 flow [2023-08-24 16:21:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 16:21:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 16:21:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1681 transitions. [2023-08-24 16:21:02,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.333531746031746 [2023-08-24 16:21:02,821 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1681 transitions. [2023-08-24 16:21:02,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1681 transitions. [2023-08-24 16:21:02,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:21:02,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1681 transitions. [2023-08-24 16:21:02,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 84.05) internal successors, (1681), 20 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:02,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 252.0) internal successors, (5292), 21 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:02,828 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 252.0) internal successors, (5292), 21 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:02,828 INFO L175 Difference]: Start difference. First operand has 52 places, 38 transitions, 228 flow. Second operand 20 states and 1681 transitions. [2023-08-24 16:21:02,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 148 transitions, 903 flow [2023-08-24 16:21:02,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 148 transitions, 869 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-24 16:21:02,832 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 417 flow [2023-08-24 16:21:02,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=417, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2023-08-24 16:21:02,832 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2023-08-24 16:21:02,832 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 417 flow [2023-08-24 16:21:02,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:02,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:21:02,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:21:02,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 16:21:03,037 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 [2023-08-24 16:21:03,040 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:21:03,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:21:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash -840518697, now seen corresponding path program 5 times [2023-08-24 16:21:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:21:03,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615826422] [2023-08-24 16:21:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:21:03,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:21:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:21:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:03,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:21:03,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615826422] [2023-08-24 16:21:03,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615826422] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:21:03,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718536145] [2023-08-24 16:21:03,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:21:03,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:21:03,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:21:03,641 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) [2023-08-24 16:21:03,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 16:21:03,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:21:03,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:21:03,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 16:21:03,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:21:03,851 INFO L351 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 11 treesize of output 7 [2023-08-24 16:21:03,884 INFO L351 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 6 treesize of output 5 [2023-08-24 16:21:03,916 INFO L351 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 6 treesize of output 5 [2023-08-24 16:21:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:04,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:21:04,835 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:21:04,836 INFO L351 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 [2023-08-24 16:21:04,863 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-24 16:21:04,864 INFO L351 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 562 treesize of output 520 [2023-08-24 16:21:04,875 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:21:04,886 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:21:04,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 180 [2023-08-24 16:21:04,917 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-24 16:21:04,918 INFO L351 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 153 [2023-08-24 16:21:05,383 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:21:05,383 INFO L351 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 [2023-08-24 16:21:05,399 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 16:21:05,399 INFO L351 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 562 treesize of output 502 [2023-08-24 16:21:05,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:21:05,411 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:21:05,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:21:05,412 INFO L351 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 [2023-08-24 16:21:05,427 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 16:21:05,428 INFO L351 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 [2023-08-24 16:21:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:05,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718536145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:21:05,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:21:05,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-08-24 16:21:05,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293664804] [2023-08-24 16:21:05,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:21:05,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 16:21:05,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:21:05,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 16:21:05,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=553, Unknown=2, NotChecked=0, Total=756 [2023-08-24 16:21:05,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 16:21:05,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 417 flow. Second operand has 28 states, 28 states have (on average 71.75) internal successors, (2009), 28 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:05,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:21:05,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 16:21:05,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:21:07,838 INFO L124 PetriNetUnfolderBase]: 762/1486 cut-off events. [2023-08-24 16:21:07,839 INFO L125 PetriNetUnfolderBase]: For 3156/3156 co-relation queries the response was YES. [2023-08-24 16:21:07,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5084 conditions, 1486 events. 762/1486 cut-off events. For 3156/3156 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8476 event pairs, 70 based on Foata normal form. 25/1508 useless extension candidates. Maximal degree in co-relation 4610. Up to 300 conditions per place. [2023-08-24 16:21:07,844 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 87 selfloop transitions, 66 changer transitions 78/231 dead transitions. [2023-08-24 16:21:07,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 231 transitions, 1685 flow [2023-08-24 16:21:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 16:21:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 16:21:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2375 transitions. [2023-08-24 16:21:07,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3040194572452637 [2023-08-24 16:21:07,849 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2375 transitions. [2023-08-24 16:21:07,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2375 transitions. [2023-08-24 16:21:07,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:21:07,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2375 transitions. [2023-08-24 16:21:07,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 76.61290322580645) internal successors, (2375), 31 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:07,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 252.0) internal successors, (8064), 32 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:07,861 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 252.0) internal successors, (8064), 32 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:07,861 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 417 flow. Second operand 31 states and 2375 transitions. [2023-08-24 16:21:07,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 231 transitions, 1685 flow [2023-08-24 16:21:07,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 231 transitions, 1594 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-08-24 16:21:07,872 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 1048 flow [2023-08-24 16:21:07,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1048, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2023-08-24 16:21:07,874 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 79 predicate places. [2023-08-24 16:21:07,875 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 1048 flow [2023-08-24 16:21:07,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.75) internal successors, (2009), 28 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:07,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:21:07,875 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:21:07,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 16:21:08,080 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 [2023-08-24 16:21:08,082 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:21:08,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:21:08,082 INFO L85 PathProgramCache]: Analyzing trace with hash -484179071, now seen corresponding path program 6 times [2023-08-24 16:21:08,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:21:08,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445883503] [2023-08-24 16:21:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:21:08,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:21:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:21:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:08,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:21:08,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445883503] [2023-08-24 16:21:08,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445883503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:21:08,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105873422] [2023-08-24 16:21:08,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:21:08,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:21:08,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:21:08,740 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) [2023-08-24 16:21:08,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 16:21:08,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:21:08,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:21:08,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 16:21:08,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:21:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:21:08,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:21:09,032 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:21:09,033 INFO L351 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 68 treesize of output 44 [2023-08-24 16:21:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:21:09,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105873422] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:21:09,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:21:09,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2023-08-24 16:21:09,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073362822] [2023-08-24 16:21:09,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:21:09,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 16:21:09,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:21:09,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 16:21:09,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-08-24 16:21:09,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 16:21:09,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 1048 flow. Second operand has 22 states, 22 states have (on average 79.22727272727273) internal successors, (1743), 22 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:09,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:21:09,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 16:21:09,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:21:09,550 INFO L124 PetriNetUnfolderBase]: 838/1622 cut-off events. [2023-08-24 16:21:09,550 INFO L125 PetriNetUnfolderBase]: For 6230/6230 co-relation queries the response was YES. [2023-08-24 16:21:09,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 1622 events. 838/1622 cut-off events. For 6230/6230 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9425 event pairs, 222 based on Foata normal form. 8/1627 useless extension candidates. Maximal degree in co-relation 5819. Up to 693 conditions per place. [2023-08-24 16:21:09,557 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 78 selfloop transitions, 44 changer transitions 28/150 dead transitions. [2023-08-24 16:21:09,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 150 transitions, 1600 flow [2023-08-24 16:21:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 16:21:09,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 16:21:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1153 transitions. [2023-08-24 16:21:09,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3268140589569161 [2023-08-24 16:21:09,561 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1153 transitions. [2023-08-24 16:21:09,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1153 transitions. [2023-08-24 16:21:09,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:21:09,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1153 transitions. [2023-08-24 16:21:09,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 82.35714285714286) internal successors, (1153), 14 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:09,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 252.0) internal successors, (3780), 15 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:09,568 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 252.0) internal successors, (3780), 15 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:09,568 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 1048 flow. Second operand 14 states and 1153 transitions. [2023-08-24 16:21:09,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 150 transitions, 1600 flow [2023-08-24 16:21:09,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 150 transitions, 1302 flow, removed 140 selfloop flow, removed 8 redundant places. [2023-08-24 16:21:09,596 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 963 flow [2023-08-24 16:21:09,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=963, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2023-08-24 16:21:09,598 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-08-24 16:21:09,598 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 963 flow [2023-08-24 16:21:09,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 79.22727272727273) internal successors, (1743), 22 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:09,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:21:09,599 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:21:09,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 16:21:09,804 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 [2023-08-24 16:21:09,805 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:21:09,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:21:09,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1932319888, now seen corresponding path program 7 times [2023-08-24 16:21:09,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:21:09,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950504891] [2023-08-24 16:21:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:21:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:21:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:21:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:21:09,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:21:09,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950504891] [2023-08-24 16:21:09,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950504891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:21:09,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711694386] [2023-08-24 16:21:09,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:21:09,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:21:09,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:21:10,012 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) [2023-08-24 16:21:10,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 16:21:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:21:10,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 16:21:10,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:21:10,167 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:21:10,167 INFO L351 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 158 treesize of output 108 [2023-08-24 16:21:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:21:10,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:21:10,356 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 16:21:10,357 INFO L351 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 174 treesize of output 126 [2023-08-24 16:21:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:21:10,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711694386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:21:10,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:21:10,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2023-08-24 16:21:10,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55301990] [2023-08-24 16:21:10,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:21:10,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:21:10,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:21:10,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:21:10,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:21:10,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 252 [2023-08-24 16:21:10,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 963 flow. Second operand has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:10,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:21:10,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 252 [2023-08-24 16:21:10,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:21:10,870 INFO L124 PetriNetUnfolderBase]: 1032/1992 cut-off events. [2023-08-24 16:21:10,870 INFO L125 PetriNetUnfolderBase]: For 4813/4817 co-relation queries the response was YES. [2023-08-24 16:21:10,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6699 conditions, 1992 events. 1032/1992 cut-off events. For 4813/4817 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12444 event pairs, 179 based on Foata normal form. 32/2012 useless extension candidates. Maximal degree in co-relation 6669. Up to 544 conditions per place. [2023-08-24 16:21:10,877 INFO L140 encePairwiseOnDemand]: 247/252 looper letters, 78 selfloop transitions, 55 changer transitions 65/202 dead transitions. [2023-08-24 16:21:10,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 202 transitions, 1922 flow [2023-08-24 16:21:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 16:21:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 16:21:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1655 transitions. [2023-08-24 16:21:10,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3648589065255732 [2023-08-24 16:21:10,881 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1655 transitions. [2023-08-24 16:21:10,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1655 transitions. [2023-08-24 16:21:10,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:21:10,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1655 transitions. [2023-08-24 16:21:10,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 91.94444444444444) internal successors, (1655), 18 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:10,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 252.0) internal successors, (4788), 19 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:10,899 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 252.0) internal successors, (4788), 19 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:10,899 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 963 flow. Second operand 18 states and 1655 transitions. [2023-08-24 16:21:10,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 202 transitions, 1922 flow [2023-08-24 16:21:10,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 202 transitions, 1792 flow, removed 35 selfloop flow, removed 17 redundant places. [2023-08-24 16:21:10,915 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 1144 flow [2023-08-24 16:21:10,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1144, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2023-08-24 16:21:10,916 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 84 predicate places. [2023-08-24 16:21:10,916 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 1144 flow [2023-08-24 16:21:10,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:10,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:21:10,917 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:21:10,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 16:21:11,121 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 [2023-08-24 16:21:11,122 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:21:11,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:21:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1926316929, now seen corresponding path program 8 times [2023-08-24 16:21:11,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:21:11,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460308999] [2023-08-24 16:21:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:21:11,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:21:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:21:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:11,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:21:11,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460308999] [2023-08-24 16:21:11,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460308999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:21:11,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302389323] [2023-08-24 16:21:11,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:21:11,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:21:11,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:21:11,870 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) [2023-08-24 16:21:11,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 16:21:11,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:21:11,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:21:11,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 16:21:11,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:21:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:12,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:21:12,622 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 16:21:12,623 INFO L351 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 236 treesize of output 190 [2023-08-24 16:21:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:13,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302389323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:21:13,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:21:13,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 16:21:13,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169492796] [2023-08-24 16:21:13,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:21:13,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 16:21:13,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:21:13,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 16:21:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2023-08-24 16:21:13,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 16:21:13,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 1144 flow. Second operand has 30 states, 30 states have (on average 78.73333333333333) internal successors, (2362), 30 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:13,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:21:13,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 16:21:13,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:21:15,016 INFO L124 PetriNetUnfolderBase]: 1693/3174 cut-off events. [2023-08-24 16:21:15,016 INFO L125 PetriNetUnfolderBase]: For 10128/10128 co-relation queries the response was YES. [2023-08-24 16:21:15,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11994 conditions, 3174 events. 1693/3174 cut-off events. For 10128/10128 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21033 event pairs, 188 based on Foata normal form. 14/3188 useless extension candidates. Maximal degree in co-relation 11968. Up to 857 conditions per place. [2023-08-24 16:21:15,029 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 172 selfloop transitions, 124 changer transitions 107/403 dead transitions. [2023-08-24 16:21:15,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 403 transitions, 3805 flow [2023-08-24 16:21:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 16:21:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 16:21:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3300 transitions. [2023-08-24 16:21:15,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33577533577533575 [2023-08-24 16:21:15,033 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3300 transitions. [2023-08-24 16:21:15,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3300 transitions. [2023-08-24 16:21:15,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:21:15,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3300 transitions. [2023-08-24 16:21:15,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 84.61538461538461) internal successors, (3300), 39 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:15,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 252.0) internal successors, (10080), 40 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:15,044 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 252.0) internal successors, (10080), 40 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:15,044 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 1144 flow. Second operand 39 states and 3300 transitions. [2023-08-24 16:21:15,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 403 transitions, 3805 flow [2023-08-24 16:21:15,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 403 transitions, 3455 flow, removed 166 selfloop flow, removed 10 redundant places. [2023-08-24 16:21:15,077 INFO L231 Difference]: Finished difference. Result has 130 places, 179 transitions, 2453 flow [2023-08-24 16:21:15,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2453, PETRI_PLACES=130, PETRI_TRANSITIONS=179} [2023-08-24 16:21:15,077 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 110 predicate places. [2023-08-24 16:21:15,077 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 179 transitions, 2453 flow [2023-08-24 16:21:15,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 78.73333333333333) internal successors, (2362), 30 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:15,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:21:15,078 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:21:15,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 16:21:15,278 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 [2023-08-24 16:21:15,279 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:21:15,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:21:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash -631472656, now seen corresponding path program 9 times [2023-08-24 16:21:15,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:21:15,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186806025] [2023-08-24 16:21:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:21:15,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:21:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:21:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:16,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:21:16,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186806025] [2023-08-24 16:21:16,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186806025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:21:16,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114036754] [2023-08-24 16:21:16,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:21:16,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:21:16,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:21:16,177 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) [2023-08-24 16:21:16,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 16:21:16,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 16:21:16,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:21:16,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 16:21:16,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:21:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:16,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:21:17,208 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 16:21:17,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-24 16:21:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:18,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114036754] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:21:18,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:21:18,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-08-24 16:21:18,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362909224] [2023-08-24 16:21:18,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:21:18,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 16:21:18,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:21:18,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 16:21:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 16:21:18,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 16:21:18,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 179 transitions, 2453 flow. Second operand has 38 states, 38 states have (on average 78.57894736842105) internal successors, (2986), 38 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:18,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:21:18,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 16:21:18,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:21:22,412 INFO L124 PetriNetUnfolderBase]: 2539/4776 cut-off events. [2023-08-24 16:21:22,412 INFO L125 PetriNetUnfolderBase]: For 27711/27711 co-relation queries the response was YES. [2023-08-24 16:21:22,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20780 conditions, 4776 events. 2539/4776 cut-off events. For 27711/27711 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34015 event pairs, 380 based on Foata normal form. 75/4851 useless extension candidates. Maximal degree in co-relation 20740. Up to 1197 conditions per place. [2023-08-24 16:21:22,435 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 269 selfloop transitions, 164 changer transitions 144/577 dead transitions. [2023-08-24 16:21:22,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 577 transitions, 6506 flow [2023-08-24 16:21:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 16:21:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 16:21:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4408 transitions. [2023-08-24 16:21:22,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3363858363858364 [2023-08-24 16:21:22,440 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4408 transitions. [2023-08-24 16:21:22,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4408 transitions. [2023-08-24 16:21:22,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:21:22,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4408 transitions. [2023-08-24 16:21:22,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 84.76923076923077) internal successors, (4408), 52 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:22,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 252.0) internal successors, (13356), 53 states have internal predecessors, (13356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:22,454 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 252.0) internal successors, (13356), 53 states have internal predecessors, (13356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:22,454 INFO L175 Difference]: Start difference. First operand has 130 places, 179 transitions, 2453 flow. Second operand 52 states and 4408 transitions. [2023-08-24 16:21:22,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 577 transitions, 6506 flow [2023-08-24 16:21:22,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 577 transitions, 6016 flow, removed 229 selfloop flow, removed 7 redundant places. [2023-08-24 16:21:22,540 INFO L231 Difference]: Finished difference. Result has 196 places, 248 transitions, 3845 flow [2023-08-24 16:21:22,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3845, PETRI_PLACES=196, PETRI_TRANSITIONS=248} [2023-08-24 16:21:22,540 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 176 predicate places. [2023-08-24 16:21:22,540 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 248 transitions, 3845 flow [2023-08-24 16:21:22,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 78.57894736842105) internal successors, (2986), 38 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:22,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:21:22,541 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:21:22,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 16:21:22,745 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 [2023-08-24 16:21:22,745 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:21:22,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:21:22,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1380428386, now seen corresponding path program 10 times [2023-08-24 16:21:22,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:21:22,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541570166] [2023-08-24 16:21:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:21:22,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:21:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:21:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:23,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:21:23,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541570166] [2023-08-24 16:21:23,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541570166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:21:23,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017040619] [2023-08-24 16:21:23,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:21:23,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:21:23,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:21:23,932 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) [2023-08-24 16:21:23,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 16:21:24,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:21:24,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:21:24,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 16:21:24,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:21:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:24,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:21:24,810 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 16:21:24,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-24 16:21:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017040619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:21:25,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:21:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2023-08-24 16:21:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609307281] [2023-08-24 16:21:25,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:21:25,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 16:21:25,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:21:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 16:21:25,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 16:21:25,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 16:21:25,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 248 transitions, 3845 flow. Second operand has 36 states, 36 states have (on average 71.61111111111111) internal successors, (2578), 36 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:25,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:21:25,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 16:21:25,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:21:29,030 INFO L124 PetriNetUnfolderBase]: 3459/6454 cut-off events. [2023-08-24 16:21:29,030 INFO L125 PetriNetUnfolderBase]: For 98411/98411 co-relation queries the response was YES. [2023-08-24 16:21:29,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35228 conditions, 6454 events. 3459/6454 cut-off events. For 98411/98411 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 47152 event pairs, 648 based on Foata normal form. 8/6462 useless extension candidates. Maximal degree in co-relation 35165. Up to 1870 conditions per place. [2023-08-24 16:21:29,062 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 227 selfloop transitions, 206 changer transitions 99/532 dead transitions. [2023-08-24 16:21:29,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 532 transitions, 7819 flow [2023-08-24 16:21:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 16:21:29,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 16:21:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2700 transitions. [2023-08-24 16:21:29,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30612244897959184 [2023-08-24 16:21:29,065 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2700 transitions. [2023-08-24 16:21:29,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2700 transitions. [2023-08-24 16:21:29,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:21:29,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2700 transitions. [2023-08-24 16:21:29,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 77.14285714285714) internal successors, (2700), 35 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:29,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 252.0) internal successors, (9072), 36 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:29,073 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 252.0) internal successors, (9072), 36 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:29,074 INFO L175 Difference]: Start difference. First operand has 196 places, 248 transitions, 3845 flow. Second operand 35 states and 2700 transitions. [2023-08-24 16:21:29,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 532 transitions, 7819 flow [2023-08-24 16:21:29,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 532 transitions, 6819 flow, removed 472 selfloop flow, removed 20 redundant places. [2023-08-24 16:21:29,463 INFO L231 Difference]: Finished difference. Result has 217 places, 322 transitions, 5088 flow [2023-08-24 16:21:29,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5088, PETRI_PLACES=217, PETRI_TRANSITIONS=322} [2023-08-24 16:21:29,464 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-08-24 16:21:29,464 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 322 transitions, 5088 flow [2023-08-24 16:21:29,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 71.61111111111111) internal successors, (2578), 36 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:29,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:21:29,465 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:21:29,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 16:21:29,669 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 [2023-08-24 16:21:29,669 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:21:29,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:21:29,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2123255324, now seen corresponding path program 11 times [2023-08-24 16:21:29,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:21:29,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521661771] [2023-08-24 16:21:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:21:29,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:21:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:21:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:30,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:21:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521661771] [2023-08-24 16:21:30,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521661771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:21:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869184282] [2023-08-24 16:21:30,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:21:30,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:21:30,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:21:30,566 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) [2023-08-24 16:21:30,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 16:21:30,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:21:30,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:21:30,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 16:21:30,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:21:30,865 INFO L351 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 11 treesize of output 7 [2023-08-24 16:21:30,906 INFO L351 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 6 treesize of output 5 [2023-08-24 16:21:30,941 INFO L351 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 6 treesize of output 5 [2023-08-24 16:21:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:31,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:21:32,118 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:21:32,118 INFO L351 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 182 treesize of output 122 [2023-08-24 16:21:32,166 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 16:21:32,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 378 [2023-08-24 16:21:32,251 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 16:21:32,252 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 298 [2023-08-24 16:21:32,304 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 16:21:32,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 229 [2023-08-24 16:21:34,721 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:21:34,722 INFO L351 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 182 treesize of output 122 [2023-08-24 16:21:34,743 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 16:21:34,744 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 336 [2023-08-24 16:21:34,767 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 16:21:34,767 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 256 [2023-08-24 16:21:34,793 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 16:21:34,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 187 [2023-08-24 16:21:34,886 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 16:21:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:35,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869184282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:21:35,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:21:35,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-24 16:21:35,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237141055] [2023-08-24 16:21:35,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:21:35,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 16:21:35,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:21:35,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 16:21:35,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1126, Unknown=6, NotChecked=0, Total=1482 [2023-08-24 16:21:35,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 16:21:35,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 322 transitions, 5088 flow. Second operand has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:35,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:21:35,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 16:21:35,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:21:39,125 INFO L124 PetriNetUnfolderBase]: 3885/7241 cut-off events. [2023-08-24 16:21:39,126 INFO L125 PetriNetUnfolderBase]: For 140681/140681 co-relation queries the response was YES. [2023-08-24 16:21:39,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40289 conditions, 7241 events. 3885/7241 cut-off events. For 140681/140681 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 54240 event pairs, 1350 based on Foata normal form. 12/7253 useless extension candidates. Maximal degree in co-relation 40220. Up to 5546 conditions per place. [2023-08-24 16:21:39,221 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 326 selfloop transitions, 108 changer transitions 102/536 dead transitions. [2023-08-24 16:21:39,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 536 transitions, 7635 flow [2023-08-24 16:21:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 16:21:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 16:21:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2900 transitions. [2023-08-24 16:21:39,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3028404344193818 [2023-08-24 16:21:39,224 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2900 transitions. [2023-08-24 16:21:39,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2900 transitions. [2023-08-24 16:21:39,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:21:39,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2900 transitions. [2023-08-24 16:21:39,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 76.3157894736842) internal successors, (2900), 38 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:39,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 252.0) internal successors, (9828), 39 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:39,232 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 252.0) internal successors, (9828), 39 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:39,232 INFO L175 Difference]: Start difference. First operand has 217 places, 322 transitions, 5088 flow. Second operand 38 states and 2900 transitions. [2023-08-24 16:21:39,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 536 transitions, 7635 flow [2023-08-24 16:21:40,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 536 transitions, 7264 flow, removed 123 selfloop flow, removed 20 redundant places. [2023-08-24 16:21:40,018 INFO L231 Difference]: Finished difference. Result has 247 places, 370 transitions, 5944 flow [2023-08-24 16:21:40,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=4761, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5944, PETRI_PLACES=247, PETRI_TRANSITIONS=370} [2023-08-24 16:21:40,018 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-08-24 16:21:40,019 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 370 transitions, 5944 flow [2023-08-24 16:21:40,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:40,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:21:40,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:21:40,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-24 16:21:40,223 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 [2023-08-24 16:21:40,224 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:21:40,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:21:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash -120658482, now seen corresponding path program 12 times [2023-08-24 16:21:40,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:21:40,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636235895] [2023-08-24 16:21:40,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:21:40,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:21:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:21:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:41,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:21:41,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636235895] [2023-08-24 16:21:41,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636235895] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:21:41,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203715615] [2023-08-24 16:21:41,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:21:41,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:21:41,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:21:41,492 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) [2023-08-24 16:21:41,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 16:21:41,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:21:41,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:21:41,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 16:21:41,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:21:41,765 INFO L351 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 13 treesize of output 9 [2023-08-24 16:21:41,806 INFO L351 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 6 treesize of output 5 [2023-08-24 16:21:41,841 INFO L351 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 6 treesize of output 5 [2023-08-24 16:21:42,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:21:42,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:21:42,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:21:42,162 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:21:42,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:21:42,163 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:21:42,166 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:21:42,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 24 [2023-08-24 16:21:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:42,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:21:44,096 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:21:44,096 INFO L351 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 180 treesize of output 120 [2023-08-24 16:21:44,146 INFO L322 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2023-08-24 16:21:44,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 368 treesize of output 372 [2023-08-24 16:21:44,196 INFO L322 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2023-08-24 16:21:44,196 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 318 treesize of output 296 [2023-08-24 16:21:44,249 INFO L322 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2023-08-24 16:21:44,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 213 treesize of output 229 [2023-08-24 16:21:46,524 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:21:46,524 INFO L351 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 180 treesize of output 120 [2023-08-24 16:21:46,556 INFO L322 Elim1Store]: treesize reduction 96, result has 11.9 percent of original size [2023-08-24 16:21:46,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 776 treesize of output 688 [2023-08-24 16:21:46,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:21:46,629 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:21:46,630 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:21:46,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:21:46,631 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:21:46,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:21:46,633 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 216 [2023-08-24 16:21:46,662 INFO L322 Elim1Store]: treesize reduction 96, result has 11.9 percent of original size [2023-08-24 16:21:46,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 251 treesize of output 187 [2023-08-24 16:21:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:21:46,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203715615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:21:46,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:21:46,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-24 16:21:46,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827008479] [2023-08-24 16:21:46,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:21:46,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 16:21:46,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:21:46,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 16:21:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1216, Unknown=4, NotChecked=0, Total=1560 [2023-08-24 16:21:46,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 16:21:46,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 370 transitions, 5944 flow. Second operand has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:21:46,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:21:46,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 16:21:46,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:22:00,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:22:03,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:22:05,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:22:08,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:22:09,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:22:09,991 INFO L124 PetriNetUnfolderBase]: 4745/8862 cut-off events. [2023-08-24 16:22:09,992 INFO L125 PetriNetUnfolderBase]: For 211353/211353 co-relation queries the response was YES. [2023-08-24 16:22:10,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52411 conditions, 8862 events. 4745/8862 cut-off events. For 211353/211353 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 67707 event pairs, 876 based on Foata normal form. 93/8955 useless extension candidates. Maximal degree in co-relation 52329. Up to 3769 conditions per place. [2023-08-24 16:22:10,042 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 286 selfloop transitions, 242 changer transitions 146/674 dead transitions. [2023-08-24 16:22:10,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 674 transitions, 10211 flow [2023-08-24 16:22:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-24 16:22:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-24 16:22:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3540 transitions. [2023-08-24 16:22:10,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3053830227743271 [2023-08-24 16:22:10,048 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3540 transitions. [2023-08-24 16:22:10,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3540 transitions. [2023-08-24 16:22:10,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:22:10,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3540 transitions. [2023-08-24 16:22:10,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 76.95652173913044) internal successors, (3540), 46 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:10,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 252.0) internal successors, (11844), 47 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:10,057 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 252.0) internal successors, (11844), 47 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:10,057 INFO L175 Difference]: Start difference. First operand has 247 places, 370 transitions, 5944 flow. Second operand 46 states and 3540 transitions. [2023-08-24 16:22:10,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 674 transitions, 10211 flow [2023-08-24 16:22:10,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 674 transitions, 9281 flow, removed 405 selfloop flow, removed 29 redundant places. [2023-08-24 16:22:10,889 INFO L231 Difference]: Finished difference. Result has 280 places, 443 transitions, 7962 flow [2023-08-24 16:22:10,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=7962, PETRI_PLACES=280, PETRI_TRANSITIONS=443} [2023-08-24 16:22:10,889 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 260 predicate places. [2023-08-24 16:22:10,889 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 443 transitions, 7962 flow [2023-08-24 16:22:10,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:10,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:22:10,890 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:22:10,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 16:22:11,094 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 [2023-08-24 16:22:11,094 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:22:11,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:22:11,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1137524077, now seen corresponding path program 13 times [2023-08-24 16:22:11,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:22:11,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451993770] [2023-08-24 16:22:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:22:11,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:22:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:22:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:22:12,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:22:12,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451993770] [2023-08-24 16:22:12,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451993770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:22:12,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944533670] [2023-08-24 16:22:12,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:22:12,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:22:12,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:22:12,289 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:22:12,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 16:22:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:22:12,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 16:22:12,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:22:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:22:12,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:22:13,089 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 16:22:13,089 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 264 treesize of output 230 [2023-08-24 16:22:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:22:13,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944533670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:22:13,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:22:13,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 31 [2023-08-24 16:22:13,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241581561] [2023-08-24 16:22:13,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:22:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 16:22:13,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:22:13,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 16:22:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 16:22:13,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 16:22:13,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 443 transitions, 7962 flow. Second operand has 33 states, 33 states have (on average 78.84848484848484) internal successors, (2602), 33 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:13,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:22:13,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 16:22:13,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:22:16,905 INFO L124 PetriNetUnfolderBase]: 5579/10352 cut-off events. [2023-08-24 16:22:16,905 INFO L125 PetriNetUnfolderBase]: For 223408/223408 co-relation queries the response was YES. [2023-08-24 16:22:16,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59042 conditions, 10352 events. 5579/10352 cut-off events. For 223408/223408 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 79781 event pairs, 1250 based on Foata normal form. 48/10400 useless extension candidates. Maximal degree in co-relation 58943. Up to 5186 conditions per place. [2023-08-24 16:22:16,971 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 347 selfloop transitions, 248 changer transitions 114/709 dead transitions. [2023-08-24 16:22:16,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 709 transitions, 12303 flow [2023-08-24 16:22:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 16:22:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 16:22:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2780 transitions. [2023-08-24 16:22:16,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342953342953343 [2023-08-24 16:22:16,980 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2780 transitions. [2023-08-24 16:22:16,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2780 transitions. [2023-08-24 16:22:16,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:22:16,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2780 transitions. [2023-08-24 16:22:16,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 84.24242424242425) internal successors, (2780), 33 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:16,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 252.0) internal successors, (8568), 34 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:16,987 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 252.0) internal successors, (8568), 34 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:16,987 INFO L175 Difference]: Start difference. First operand has 280 places, 443 transitions, 7962 flow. Second operand 33 states and 2780 transitions. [2023-08-24 16:22:16,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 709 transitions, 12303 flow [2023-08-24 16:22:18,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 709 transitions, 10850 flow, removed 665 selfloop flow, removed 24 redundant places. [2023-08-24 16:22:18,356 INFO L231 Difference]: Finished difference. Result has 299 places, 521 transitions, 9350 flow [2023-08-24 16:22:18,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=6856, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9350, PETRI_PLACES=299, PETRI_TRANSITIONS=521} [2023-08-24 16:22:18,356 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 279 predicate places. [2023-08-24 16:22:18,356 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 521 transitions, 9350 flow [2023-08-24 16:22:18,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.84848484848484) internal successors, (2602), 33 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:18,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:22:18,357 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:22:18,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 16:22:18,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 16:22:18,561 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:22:18,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:22:18,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1786684284, now seen corresponding path program 14 times [2023-08-24 16:22:18,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:22:18,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360428945] [2023-08-24 16:22:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:22:18,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:22:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:22:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:22:19,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:22:19,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360428945] [2023-08-24 16:22:19,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360428945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:22:19,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320811279] [2023-08-24 16:22:19,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:22:19,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:22:19,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:22:19,676 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:22:19,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 16:22:19,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:22:19,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:22:19,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 16:22:19,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:22:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:22:20,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:22:20,949 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 16:22:20,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-24 16:22:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:22:22,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320811279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:22:22,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:22:22,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 42 [2023-08-24 16:22:22,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904323202] [2023-08-24 16:22:22,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:22:22,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-24 16:22:22,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:22:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-24 16:22:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2023-08-24 16:22:22,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 16:22:22,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 521 transitions, 9350 flow. Second operand has 44 states, 44 states have (on average 71.52272727272727) internal successors, (3147), 44 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:22,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:22:22,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 16:22:22,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:22:47,065 INFO L124 PetriNetUnfolderBase]: 26306/48216 cut-off events. [2023-08-24 16:22:47,065 INFO L125 PetriNetUnfolderBase]: For 1352975/1352975 co-relation queries the response was YES. [2023-08-24 16:22:47,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333357 conditions, 48216 events. 26306/48216 cut-off events. For 1352975/1352975 co-relation queries the response was YES. Maximal size of possible extension queue 1920. Compared 456134 event pairs, 1436 based on Foata normal form. 282/48498 useless extension candidates. Maximal degree in co-relation 333246. Up to 13989 conditions per place. [2023-08-24 16:22:47,928 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 581 selfloop transitions, 1979 changer transitions 386/2946 dead transitions. [2023-08-24 16:22:47,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 2946 transitions, 57450 flow [2023-08-24 16:22:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-08-24 16:22:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2023-08-24 16:22:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 11185 transitions. [2023-08-24 16:22:47,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3103840603840604 [2023-08-24 16:22:47,939 INFO L72 ComplementDD]: Start complementDD. Operand 143 states and 11185 transitions. [2023-08-24 16:22:47,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 11185 transitions. [2023-08-24 16:22:47,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:22:47,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 143 states and 11185 transitions. [2023-08-24 16:22:47,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 144 states, 143 states have (on average 78.21678321678321) internal successors, (11185), 143 states have internal predecessors, (11185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:47,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 144 states, 144 states have (on average 252.0) internal successors, (36288), 144 states have internal predecessors, (36288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:47,973 INFO L81 ComplementDD]: Finished complementDD. Result has 144 states, 144 states have (on average 252.0) internal successors, (36288), 144 states have internal predecessors, (36288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:47,974 INFO L175 Difference]: Start difference. First operand has 299 places, 521 transitions, 9350 flow. Second operand 143 states and 11185 transitions. [2023-08-24 16:22:47,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 2946 transitions, 57450 flow [2023-08-24 16:22:53,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 2946 transitions, 54337 flow, removed 1439 selfloop flow, removed 21 redundant places. [2023-08-24 16:22:53,362 INFO L231 Difference]: Finished difference. Result has 505 places, 2126 transitions, 50014 flow [2023-08-24 16:22:53,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=8681, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=143, PETRI_FLOW=50014, PETRI_PLACES=505, PETRI_TRANSITIONS=2126} [2023-08-24 16:22:53,368 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 485 predicate places. [2023-08-24 16:22:53,368 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 2126 transitions, 50014 flow [2023-08-24 16:22:53,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 71.52272727272727) internal successors, (3147), 44 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:53,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:22:53,369 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:22:53,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 16:22:53,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:22:53,573 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:22:53,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:22:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash 383970864, now seen corresponding path program 15 times [2023-08-24 16:22:53,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:22:53,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654304772] [2023-08-24 16:22:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:22:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:22:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:22:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:22:54,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:22:54,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654304772] [2023-08-24 16:22:54,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654304772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:22:54,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324901111] [2023-08-24 16:22:54,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:22:54,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:22:54,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:22:54,714 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:22:54,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 16:22:55,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:22:55,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:22:55,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 16:22:55,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:22:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:22:55,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:22:56,103 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 16:22:56,103 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-24 16:22:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:22:57,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324901111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:22:57,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:22:57,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 16:22:57,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875726025] [2023-08-24 16:22:57,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:22:57,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 16:22:57,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:22:57,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 16:22:57,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1518, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 16:22:57,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 16:22:57,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 2126 transitions, 50014 flow. Second operand has 43 states, 43 states have (on average 78.53488372093024) internal successors, (3377), 43 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:22:57,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:22:57,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 16:22:57,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:24:07,009 INFO L124 PetriNetUnfolderBase]: 48387/88745 cut-off events. [2023-08-24 16:24:07,010 INFO L125 PetriNetUnfolderBase]: For 6263825/6263825 co-relation queries the response was YES. [2023-08-24 16:24:09,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717239 conditions, 88745 events. 48387/88745 cut-off events. For 6263825/6263825 co-relation queries the response was YES. Maximal size of possible extension queue 3753. Compared 918662 event pairs, 16408 based on Foata normal form. 604/89349 useless extension candidates. Maximal degree in co-relation 717049. Up to 42929 conditions per place. [2023-08-24 16:24:09,570 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 2865 selfloop transitions, 2116 changer transitions 469/5450 dead transitions. [2023-08-24 16:24:09,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 5450 transitions, 154237 flow [2023-08-24 16:24:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-08-24 16:24:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2023-08-24 16:24:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 14855 transitions. [2023-08-24 16:24:09,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33878398102536034 [2023-08-24 16:24:09,581 INFO L72 ComplementDD]: Start complementDD. Operand 174 states and 14855 transitions. [2023-08-24 16:24:09,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 174 states and 14855 transitions. [2023-08-24 16:24:09,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:24:09,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 174 states and 14855 transitions. [2023-08-24 16:24:09,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 175 states, 174 states have (on average 85.3735632183908) internal successors, (14855), 174 states have internal predecessors, (14855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:24:09,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 175 states, 175 states have (on average 252.0) internal successors, (44100), 175 states have internal predecessors, (44100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:24:09,792 INFO L81 ComplementDD]: Finished complementDD. Result has 175 states, 175 states have (on average 252.0) internal successors, (44100), 175 states have internal predecessors, (44100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:24:09,792 INFO L175 Difference]: Start difference. First operand has 505 places, 2126 transitions, 50014 flow. Second operand 174 states and 14855 transitions. [2023-08-24 16:24:09,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 5450 transitions, 154237 flow [2023-08-24 16:25:06,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 5450 transitions, 97613 flow, removed 28286 selfloop flow, removed 14 redundant places. [2023-08-24 16:25:06,592 INFO L231 Difference]: Finished difference. Result has 766 places, 4023 transitions, 75801 flow [2023-08-24 16:25:06,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=33839, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=174, PETRI_FLOW=75801, PETRI_PLACES=766, PETRI_TRANSITIONS=4023} [2023-08-24 16:25:06,594 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 746 predicate places. [2023-08-24 16:25:06,594 INFO L495 AbstractCegarLoop]: Abstraction has has 766 places, 4023 transitions, 75801 flow [2023-08-24 16:25:06,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 78.53488372093024) internal successors, (3377), 43 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:25:06,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:25:06,594 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:25:06,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-24 16:25:06,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 16:25:06,799 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:25:06,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:25:06,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1902098650, now seen corresponding path program 16 times [2023-08-24 16:25:06,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:25:06,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856387015] [2023-08-24 16:25:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:25:06,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:25:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:25:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:25:07,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:25:07,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856387015] [2023-08-24 16:25:07,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856387015] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:25:07,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751400914] [2023-08-24 16:25:07,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:25:07,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:25:07,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:25:07,060 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:25:07,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 16:25:07,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:25:07,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:25:07,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:25:07,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:25:07,346 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:25:07,347 INFO L351 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 226 treesize of output 140 [2023-08-24 16:25:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-24 16:25:07,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:25:07,601 INFO L322 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-24 16:25:07,601 INFO L351 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 260 treesize of output 176 [2023-08-24 16:25:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:25:07,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751400914] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:25:07,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:25:07,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 18 [2023-08-24 16:25:07,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421886644] [2023-08-24 16:25:07,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:25:07,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 16:25:07,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:25:07,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 16:25:07,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2023-08-24 16:25:07,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 252 [2023-08-24 16:25:07,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 4023 transitions, 75801 flow. Second operand has 19 states, 19 states have (on average 97.52631578947368) internal successors, (1853), 19 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:25:07,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:25:07,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 252 [2023-08-24 16:25:07,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:26:40,019 INFO L124 PetriNetUnfolderBase]: 50979/93696 cut-off events. [2023-08-24 16:26:40,019 INFO L125 PetriNetUnfolderBase]: For 7817428/7817428 co-relation queries the response was YES. [2023-08-24 16:26:44,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535146 conditions, 93696 events. 50979/93696 cut-off events. For 7817428/7817428 co-relation queries the response was YES. Maximal size of possible extension queue 4132. Compared 981744 event pairs, 17730 based on Foata normal form. 156/93852 useless extension candidates. Maximal degree in co-relation 534853. Up to 73331 conditions per place. [2023-08-24 16:26:44,437 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 3365 selfloop transitions, 1095 changer transitions 15/4475 dead transitions. [2023-08-24 16:26:44,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 4475 transitions, 97677 flow [2023-08-24 16:26:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 16:26:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 16:26:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1967 transitions. [2023-08-24 16:26:44,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108187134502924 [2023-08-24 16:26:44,439 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1967 transitions. [2023-08-24 16:26:44,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1967 transitions. [2023-08-24 16:26:44,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:26:44,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1967 transitions. [2023-08-24 16:26:44,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 103.52631578947368) internal successors, (1967), 19 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:26:44,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 252.0) internal successors, (5040), 20 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:26:44,443 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 252.0) internal successors, (5040), 20 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:26:44,443 INFO L175 Difference]: Start difference. First operand has 766 places, 4023 transitions, 75801 flow. Second operand 19 states and 1967 transitions. [2023-08-24 16:26:44,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 4475 transitions, 97677 flow [2023-08-24 16:28:19,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 4475 transitions, 87302 flow, removed 5132 selfloop flow, removed 30 redundant places. [2023-08-24 16:28:20,062 INFO L231 Difference]: Finished difference. Result has 748 places, 4340 transitions, 77321 flow [2023-08-24 16:28:20,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=63293, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=676, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=77321, PETRI_PLACES=748, PETRI_TRANSITIONS=4340} [2023-08-24 16:28:20,064 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 728 predicate places. [2023-08-24 16:28:20,064 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 4340 transitions, 77321 flow [2023-08-24 16:28:20,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 97.52631578947368) internal successors, (1853), 19 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:28:20,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:28:20,065 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:28:20,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 16:28:20,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:28:20,269 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:28:20,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:28:20,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1414204169, now seen corresponding path program 17 times [2023-08-24 16:28:20,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:28:20,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939307233] [2023-08-24 16:28:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:28:20,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:28:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:28:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:28:21,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:28:21,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939307233] [2023-08-24 16:28:21,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939307233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:28:21,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575391166] [2023-08-24 16:28:21,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:28:21,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:28:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:28:21,468 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:28:21,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 16:28:21,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:28:21,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:28:21,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-24 16:28:21,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:28:21,851 INFO L351 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 11 [2023-08-24 16:28:21,891 INFO L351 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 6 treesize of output 5 [2023-08-24 16:28:21,925 INFO L351 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 6 treesize of output 5 [2023-08-24 16:28:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:28:22,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:28:23,630 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:28:23,632 INFO L351 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 243 treesize of output 159 [2023-08-24 16:28:23,705 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:28:23,706 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 1050 [2023-08-24 16:28:23,808 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:28:23,808 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 340 treesize of output 438 [2023-08-24 16:28:23,905 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:28:23,905 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 383 [2023-08-24 16:29:10,327 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:29:10,327 INFO L351 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 243 treesize of output 159 [2023-08-24 16:29:10,380 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 16:29:10,381 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 440 [2023-08-24 16:29:10,442 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 16:29:10,443 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 332 [2023-08-24 16:29:10,509 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 16:29:10,509 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 247 [2023-08-24 16:29:10,938 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 16:29:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:29:11,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575391166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:29:11,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:29:11,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2023-08-24 16:29:11,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778324005] [2023-08-24 16:29:11,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:29:11,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-24 16:29:11,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:29:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-24 16:29:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1853, Unknown=4, NotChecked=0, Total=2256 [2023-08-24 16:29:11,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 16:29:11,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 4340 transitions, 77321 flow. Second operand has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:29:11,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:29:11,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 16:29:11,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:31:07,766 INFO L124 PetriNetUnfolderBase]: 58931/107911 cut-off events. [2023-08-24 16:31:07,767 INFO L125 PetriNetUnfolderBase]: For 8188485/8188485 co-relation queries the response was YES. [2023-08-24 16:31:12,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600915 conditions, 107911 events. 58931/107911 cut-off events. For 8188485/8188485 co-relation queries the response was YES. Maximal size of possible extension queue 4828. Compared 1149035 event pairs, 24407 based on Foata normal form. 235/108146 useless extension candidates. Maximal degree in co-relation 600631. Up to 70972 conditions per place. [2023-08-24 16:31:12,824 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 3947 selfloop transitions, 1376 changer transitions 229/5552 dead transitions. [2023-08-24 16:31:12,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 5552 transitions, 114440 flow [2023-08-24 16:31:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-24 16:31:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-24 16:31:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 5869 transitions. [2023-08-24 16:31:12,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30644319131161235 [2023-08-24 16:31:12,829 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 5869 transitions. [2023-08-24 16:31:12,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 5869 transitions. [2023-08-24 16:31:12,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:31:12,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 5869 transitions. [2023-08-24 16:31:12,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 77.22368421052632) internal successors, (5869), 76 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:31:12,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 252.0) internal successors, (19404), 77 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:31:12,842 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 252.0) internal successors, (19404), 77 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:31:12,842 INFO L175 Difference]: Start difference. First operand has 748 places, 4340 transitions, 77321 flow. Second operand 76 states and 5869 transitions. [2023-08-24 16:31:12,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 5552 transitions, 114440 flow [2023-08-24 16:33:22,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 5552 transitions, 108647 flow, removed 2744 selfloop flow, removed 76 redundant places. [2023-08-24 16:33:22,194 INFO L231 Difference]: Finished difference. Result has 657 places, 4456 transitions, 86777 flow [2023-08-24 16:33:22,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=62402, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=86777, PETRI_PLACES=657, PETRI_TRANSITIONS=4456} [2023-08-24 16:33:22,196 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 637 predicate places. [2023-08-24 16:33:22,196 INFO L495 AbstractCegarLoop]: Abstraction has has 657 places, 4456 transitions, 86777 flow [2023-08-24 16:33:22,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:33:22,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:33:22,196 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:33:22,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 16:33:22,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:33:22,401 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:33:22,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:33:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 287513655, now seen corresponding path program 18 times [2023-08-24 16:33:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:33:22,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882551430] [2023-08-24 16:33:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:33:22,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:33:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:33:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:33:23,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:33:23,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882551430] [2023-08-24 16:33:23,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882551430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:33:23,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619065456] [2023-08-24 16:33:23,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:33:23,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:33:23,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:33:23,606 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:33:23,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 16:33:23,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 16:33:23,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:33:23,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-24 16:33:23,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:33:23,929 INFO L351 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 11 [2023-08-24 16:33:23,963 INFO L351 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 6 treesize of output 5 [2023-08-24 16:33:23,998 INFO L351 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 6 treesize of output 5 [2023-08-24 16:33:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:33:24,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:33:25,664 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:33:25,664 INFO L351 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 243 treesize of output 159 [2023-08-24 16:33:25,802 INFO L322 Elim1Store]: treesize reduction 10, result has 93.5 percent of original size [2023-08-24 16:33:25,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 566 [2023-08-24 16:33:25,935 INFO L322 Elim1Store]: treesize reduction 10, result has 93.5 percent of original size [2023-08-24 16:33:25,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 458 [2023-08-24 16:33:26,055 INFO L322 Elim1Store]: treesize reduction 10, result has 93.5 percent of original size [2023-08-24 16:33:26,055 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 373 [2023-08-24 16:34:07,477 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:34:07,477 INFO L351 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 243 treesize of output 159 [2023-08-24 16:34:07,511 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 16:34:07,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 440 [2023-08-24 16:34:07,550 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 16:34:07,550 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 332 [2023-08-24 16:34:07,589 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 16:34:07,590 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 247 [2023-08-24 16:34:07,762 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 16:34:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:34:08,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619065456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:34:08,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:34:08,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2023-08-24 16:34:08,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202750440] [2023-08-24 16:34:08,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:34:08,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-24 16:34:08,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:34:08,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-24 16:34:08,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1800, Unknown=4, NotChecked=0, Total=2256 [2023-08-24 16:34:08,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 16:34:08,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 657 places, 4456 transitions, 86777 flow. Second operand has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:34:08,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:34:08,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 16:34:08,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-24 16:34:28,688 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:34:28,689 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:34:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-24 16:34:28,811 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 16:34:28,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-24 16:34:29,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:34:29,020 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (48states, 70/252 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 83550 conditions, 15707 events (9094/15706 cut-off events. For 175650/175650 co-relation queries the response was YES. Maximal size of possible extension queue 2854. Compared 142186 event pairs, 2824 based on Foata normal form. 42/18593 useless extension candidates. Maximal degree in co-relation 83323. Up to 9365 conditions per place.). [2023-08-24 16:34:29,022 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 16:34:29,022 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 16:34:29,022 INFO L445 BasicCegarLoop]: Path program histogram: [18, 1, 1, 1] [2023-08-24 16:34:29,024 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 16:34:29,024 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 16:34:29,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 04:34:29 BasicIcfg [2023-08-24 16:34:29,025 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 16:34:29,026 INFO L158 Benchmark]: Toolchain (without parser) took 818513.14ms. Allocated memory was 400.6MB in the beginning and 12.4GB in the end (delta: 12.0GB). Free memory was 376.5MB in the beginning and 6.8GB in the end (delta: -6.4GB). Peak memory consumption was 8.6GB. Max. memory is 16.0GB. [2023-08-24 16:34:29,026 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 400.6MB. Free memory was 378.0MB in the beginning and 377.8MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 16:34:29,026 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.83ms. Allocated memory is still 400.6MB. Free memory was 376.5MB in the beginning and 364.7MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 16:34:29,026 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.76ms. Allocated memory is still 400.6MB. Free memory was 364.7MB in the beginning and 362.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 16:34:29,026 INFO L158 Benchmark]: Boogie Preprocessor took 31.13ms. Allocated memory is still 400.6MB. Free memory was 362.6MB in the beginning and 361.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 16:34:29,026 INFO L158 Benchmark]: RCFGBuilder took 402.02ms. Allocated memory is still 400.6MB. Free memory was 361.4MB in the beginning and 339.6MB in the end (delta: 21.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-24 16:34:29,027 INFO L158 Benchmark]: TraceAbstraction took 817832.67ms. Allocated memory was 400.6MB in the beginning and 12.4GB in the end (delta: 12.0GB). Free memory was 338.7MB in the beginning and 6.8GB in the end (delta: -6.4GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. [2023-08-24 16:34:29,027 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 400.6MB. Free memory was 378.0MB in the beginning and 377.8MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 199.83ms. Allocated memory is still 400.6MB. Free memory was 376.5MB in the beginning and 364.7MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.76ms. Allocated memory is still 400.6MB. Free memory was 364.7MB in the beginning and 362.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.13ms. Allocated memory is still 400.6MB. Free memory was 362.6MB in the beginning and 361.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 402.02ms. Allocated memory is still 400.6MB. Free memory was 361.4MB in the beginning and 339.6MB in the end (delta: 21.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 817832.67ms. Allocated memory was 400.6MB in the beginning and 12.4GB in the end (delta: 12.0GB). Free memory was 338.7MB in the beginning and 6.8GB in the end (delta: -6.4GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 114 PlacesBefore, 20 PlacesAfterwards, 118 TransitionsBefore, 16 TransitionsAfterwards, 792 CoEnabledTransitionPairs, 6 FixpointIterations, 66 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 13 ConcurrentYvCompositions, 8 ChoiceCompositions, 124 TotalNumberOfCompositions, 860 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 851, independent: 843, independent conditional: 0, independent unconditional: 843, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 451, independent: 446, independent conditional: 0, independent unconditional: 446, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 851, independent: 397, independent conditional: 0, independent unconditional: 397, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 451, unknown conditional: 0, unknown unconditional: 451] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (48states, 70/252 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 83550 conditions, 15707 events (9094/15706 cut-off events. For 175650/175650 co-relation queries the response was YES. Maximal size of possible extension queue 2854. Compared 142186 event pairs, 2824 based on Foata normal form. 42/18593 useless extension candidates. Maximal degree in co-relation 83323. Up to 9365 conditions per place.). - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (48states, 70/252 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 83550 conditions, 15707 events (9094/15706 cut-off events. For 175650/175650 co-relation queries the response was YES. Maximal size of possible extension queue 2854. Compared 142186 event pairs, 2824 based on Foata normal form. 42/18593 useless extension candidates. Maximal degree in co-relation 83323. Up to 9365 conditions per place.). - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (48states, 70/252 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 83550 conditions, 15707 events (9094/15706 cut-off events. For 175650/175650 co-relation queries the response was YES. Maximal size of possible extension queue 2854. Compared 142186 event pairs, 2824 based on Foata normal form. 42/18593 useless extension candidates. Maximal degree in co-relation 83323. Up to 9365 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 146 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 817.8s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 673.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 108 mSolverCounterUnknown, 6211 SdHoareTripleChecker+Valid, 29.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6211 mSDsluCounter, 171 SdHoareTripleChecker+Invalid, 26.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 140 IncrementalHoareTripleChecker+Unchecked, 156 mSDsCounter, 755 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27524 IncrementalHoareTripleChecker+Invalid, 28527 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 755 mSolverCounterUnsat, 15 mSDtfsCounter, 27524 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1603 GetRequests, 396 SyntacticMatches, 14 SemanticMatches, 1193 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 38200 ImplicationChecksByTransitivity, 66.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86777occurred in iteration=20, InterpolantAutomatonStates: 787, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 133.0s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1134 ConstructedInterpolants, 28 QuantifiedInterpolants, 32344 SizeOfPredicates, 376 NumberOfNonLiveVariables, 3857 ConjunctsInSsa, 692 ConjunctsInUnsatCore, 57 InterpolantComputations, 3 PerfectInterpolantSequences, 149/924 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown