/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 01:38:16,965 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 01:38:17,022 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 01:38:17,026 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 01:38:17,026 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 01:38:17,053 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 01:38:17,053 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 01:38:17,054 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 01:38:17,054 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 01:38:17,058 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 01:38:17,058 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 01:38:17,058 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 01:38:17,058 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 01:38:17,059 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 01:38:17,060 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 01:38:17,060 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 01:38:17,060 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 01:38:17,060 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 01:38:17,060 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 01:38:17,060 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 01:38:17,060 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 01:38:17,061 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 01:38:17,061 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 01:38:17,062 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 01:38:17,062 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 01:38:17,062 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 01:38:17,062 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 01:38:17,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 01:38:17,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 01:38:17,062 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 01:38:17,063 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 01:38:17,063 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 01:38:17,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 01:38:17,063 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 01:38:17,063 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 01:38:17,064 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 01:38:17,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 01:38:17,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 01:38:17,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 01:38:17,299 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 01:38:17,299 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 01:38:17,300 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-24 01:38:18,225 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 01:38:18,409 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 01:38:18,409 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-24 01:38:18,415 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2eeb9d2/3de7b9def8d5401a87b67fdb934158c0/FLAG2ca0f58cf [2023-08-24 01:38:18,425 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2eeb9d2/3de7b9def8d5401a87b67fdb934158c0 [2023-08-24 01:38:18,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 01:38:18,428 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 01:38:18,429 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 01:38:18,429 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 01:38:18,431 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 01:38:18,432 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,432 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ed6a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18, skipping insertion in model container [2023-08-24 01:38:18,432 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,456 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 01:38:18,592 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c[4210,4223] [2023-08-24 01:38:18,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 01:38:18,609 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 01:38:18,640 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c[4210,4223] [2023-08-24 01:38:18,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 01:38:18,647 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 01:38:18,647 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 01:38:18,653 INFO L206 MainTranslator]: Completed translation [2023-08-24 01:38:18,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18 WrapperNode [2023-08-24 01:38:18,654 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 01:38:18,655 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 01:38:18,655 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 01:38:18,655 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 01:38:18,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,701 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 244 [2023-08-24 01:38:18,701 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 01:38:18,702 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 01:38:18,702 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 01:38:18,702 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 01:38:18,708 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,720 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,720 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,728 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,734 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 01:38:18,734 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 01:38:18,734 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 01:38:18,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 01:38:18,735 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (1/1) ... [2023-08-24 01:38:18,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 01:38:18,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:18,763 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 01:38:18,771 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 01:38:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 01:38:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 01:38:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 01:38:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 01:38:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 01:38:18,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 01:38:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 01:38:18,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 01:38:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 01:38:18,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 01:38:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 01:38:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 01:38:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 01:38:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 01:38:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 01:38:18,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 01:38:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 01:38:18,790 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 01:38:18,855 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 01:38:18,856 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 01:38:19,154 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 01:38:19,200 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 01:38:19,200 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-24 01:38:19,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:38:19 BoogieIcfgContainer [2023-08-24 01:38:19,202 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 01:38:19,203 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 01:38:19,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 01:38:19,205 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 01:38:19,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 01:38:18" (1/3) ... [2023-08-24 01:38:19,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7193efbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:38:19, skipping insertion in model container [2023-08-24 01:38:19,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:38:18" (2/3) ... [2023-08-24 01:38:19,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7193efbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:38:19, skipping insertion in model container [2023-08-24 01:38:19,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:38:19" (3/3) ... [2023-08-24 01:38:19,206 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2023-08-24 01:38:19,217 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 01:38:19,217 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 01:38:19,217 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 01:38:19,268 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 01:38:19,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 181 transitions, 386 flow [2023-08-24 01:38:19,392 INFO L124 PetriNetUnfolderBase]: 7/178 cut-off events. [2023-08-24 01:38:19,393 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 01:38:19,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 178 events. 7/178 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 103 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2023-08-24 01:38:19,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 181 transitions, 386 flow [2023-08-24 01:38:19,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 168 transitions, 354 flow [2023-08-24 01:38:19,406 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 01:38:19,417 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 168 transitions, 354 flow [2023-08-24 01:38:19,421 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 168 transitions, 354 flow [2023-08-24 01:38:19,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 168 transitions, 354 flow [2023-08-24 01:38:19,443 INFO L124 PetriNetUnfolderBase]: 7/168 cut-off events. [2023-08-24 01:38:19,443 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 01:38:19,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 168 events. 7/168 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 101 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2023-08-24 01:38:19,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 1266 [2023-08-24 01:38:24,591 INFO L134 LiptonReduction]: Checked pairs total: 7956 [2023-08-24 01:38:24,591 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-24 01:38:24,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 01:38:24,604 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;@807fdd5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 01:38:24,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 01:38:24,610 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 01:38:24,610 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2023-08-24 01:38:24,610 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 01:38:24,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:24,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:24,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:24,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:24,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1804651479, now seen corresponding path program 1 times [2023-08-24 01:38:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:24,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050902703] [2023-08-24 01:38:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:24,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:25,016 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 01:38:25,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:25,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050902703] [2023-08-24 01:38:25,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050902703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:25,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:38:25,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 01:38:25,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016689268] [2023-08-24 01:38:25,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:25,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 01:38:25,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 01:38:25,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 01:38:25,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 334 [2023-08-24 01:38:25,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 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 01:38:25,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:25,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 334 [2023-08-24 01:38:25,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:25,191 INFO L124 PetriNetUnfolderBase]: 558/915 cut-off events. [2023-08-24 01:38:25,192 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-24 01:38:25,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1954 conditions, 915 events. 558/915 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3832 event pairs, 557 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 1772. Up to 903 conditions per place. [2023-08-24 01:38:25,197 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 27 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-24 01:38:25,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 150 flow [2023-08-24 01:38:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 01:38:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 01:38:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-08-24 01:38:25,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341317365269461 [2023-08-24 01:38:25,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-08-24 01:38:25,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-08-24 01:38:25,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:25,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-08-24 01:38:25,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 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 01:38:25,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 01:38:25,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 01:38:25,217 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 90 flow. Second operand 3 states and 435 transitions. [2023-08-24 01:38:25,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 150 flow [2023-08-24 01:38:25,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 01:38:25,221 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 90 flow [2023-08-24 01:38:25,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-24 01:38:25,224 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2023-08-24 01:38:25,224 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 90 flow [2023-08-24 01:38:25,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 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 01:38:25,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:25,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:25,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 01:38:25,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:25,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:25,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1584610978, now seen corresponding path program 1 times [2023-08-24 01:38:25,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:25,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022729622] [2023-08-24 01:38:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:25,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:38:25,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:25,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022729622] [2023-08-24 01:38:25,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022729622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:25,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:38:25,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 01:38:25,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395872517] [2023-08-24 01:38:25,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:25,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:25,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:25,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-24 01:38:25,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 334 [2023-08-24 01:38:25,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:25,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:25,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 334 [2023-08-24 01:38:25,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:25,687 INFO L124 PetriNetUnfolderBase]: 1344/2387 cut-off events. [2023-08-24 01:38:25,687 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-24 01:38:25,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2387 events. 1344/2387 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13533 event pairs, 243 based on Foata normal form. 30/2415 useless extension candidates. Maximal degree in co-relation 4672. Up to 695 conditions per place. [2023-08-24 01:38:25,696 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 102 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2023-08-24 01:38:25,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 124 transitions, 514 flow [2023-08-24 01:38:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 01:38:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 01:38:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1405 transitions. [2023-08-24 01:38:25,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46739853626081174 [2023-08-24 01:38:25,700 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1405 transitions. [2023-08-24 01:38:25,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1405 transitions. [2023-08-24 01:38:25,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:25,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1405 transitions. [2023-08-24 01:38:25,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 156.11111111111111) internal successors, (1405), 9 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:38:25,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:25,708 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:25,708 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 90 flow. Second operand 9 states and 1405 transitions. [2023-08-24 01:38:25,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 124 transitions, 514 flow [2023-08-24 01:38:25,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 124 transitions, 510 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 01:38:25,710 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 182 flow [2023-08-24 01:38:25,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-24 01:38:25,711 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2023-08-24 01:38:25,711 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 182 flow [2023-08-24 01:38:25,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:25,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:25,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:25,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 01:38:25,712 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:25,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:25,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1241909398, now seen corresponding path program 2 times [2023-08-24 01:38:25,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:25,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246769643] [2023-08-24 01:38:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:25,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:38:25,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:25,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246769643] [2023-08-24 01:38:25,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246769643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:25,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:38:25,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 01:38:25,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579437423] [2023-08-24 01:38:25,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:25,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 01:38:25,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 01:38:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 01:38:25,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 334 [2023-08-24 01:38:25,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 01:38:25,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:25,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 334 [2023-08-24 01:38:25,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:25,948 INFO L124 PetriNetUnfolderBase]: 1068/1965 cut-off events. [2023-08-24 01:38:25,949 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2023-08-24 01:38:25,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4329 conditions, 1965 events. 1068/1965 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11494 event pairs, 851 based on Foata normal form. 20/1935 useless extension candidates. Maximal degree in co-relation 4308. Up to 1600 conditions per place. [2023-08-24 01:38:25,956 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 44 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-24 01:38:25,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 301 flow [2023-08-24 01:38:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 01:38:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 01:38:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-08-24 01:38:25,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49700598802395207 [2023-08-24 01:38:25,958 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-08-24 01:38:25,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-08-24 01:38:25,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:25,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-08-24 01:38:25,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 01:38:25,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 01:38:25,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 01:38:25,961 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 182 flow. Second operand 3 states and 498 transitions. [2023-08-24 01:38:25,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 301 flow [2023-08-24 01:38:25,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 61 transitions, 301 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 01:38:25,965 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 190 flow [2023-08-24 01:38:25,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-24 01:38:25,966 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2023-08-24 01:38:25,966 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 190 flow [2023-08-24 01:38:25,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 01:38:25,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:25,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:25,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 01:38:25,967 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:25,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:25,967 INFO L85 PathProgramCache]: Analyzing trace with hash 987197492, now seen corresponding path program 3 times [2023-08-24 01:38:25,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:25,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481816866] [2023-08-24 01:38:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:25,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:38:26,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:26,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481816866] [2023-08-24 01:38:26,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481816866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:26,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:38:26,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 01:38:26,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532605446] [2023-08-24 01:38:26,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:26,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 01:38:26,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:26,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 01:38:26,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 01:38:26,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 334 [2023-08-24 01:38:26,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 01:38:26,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:26,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 334 [2023-08-24 01:38:26,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:26,185 INFO L124 PetriNetUnfolderBase]: 1088/2009 cut-off events. [2023-08-24 01:38:26,185 INFO L125 PetriNetUnfolderBase]: For 436/438 co-relation queries the response was YES. [2023-08-24 01:38:26,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4601 conditions, 2009 events. 1088/2009 cut-off events. For 436/438 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11591 event pairs, 903 based on Foata normal form. 20/1988 useless extension candidates. Maximal degree in co-relation 4578. Up to 1606 conditions per place. [2023-08-24 01:38:26,193 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 45 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-24 01:38:26,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 316 flow [2023-08-24 01:38:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 01:38:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 01:38:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-08-24 01:38:26,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49700598802395207 [2023-08-24 01:38:26,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-08-24 01:38:26,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-08-24 01:38:26,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:26,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-08-24 01:38:26,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 01:38:26,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 01:38:26,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 01:38:26,198 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 190 flow. Second operand 3 states and 498 transitions. [2023-08-24 01:38:26,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 316 flow [2023-08-24 01:38:26,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 01:38:26,204 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 194 flow [2023-08-24 01:38:26,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-08-24 01:38:26,205 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2023-08-24 01:38:26,205 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 194 flow [2023-08-24 01:38:26,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 01:38:26,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:26,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:26,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 01:38:26,206 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:26,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:26,206 INFO L85 PathProgramCache]: Analyzing trace with hash 149885240, now seen corresponding path program 4 times [2023-08-24 01:38:26,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:26,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351195593] [2023-08-24 01:38:26,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:26,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:38:26,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:26,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351195593] [2023-08-24 01:38:26,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351195593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:26,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081606405] [2023-08-24 01:38:26,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 01:38:26,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:26,877 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 01:38:26,890 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 01:38:26,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 01:38:26,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:38:26,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 01:38:26,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:27,156 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:27,157 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:38:27,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:38:27,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081606405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:27,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:38:27,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-08-24 01:38:27,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969982059] [2023-08-24 01:38:27,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:27,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:27,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:27,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:27,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-08-24 01:38:27,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 334 [2023-08-24 01:38:27,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:27,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:27,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 334 [2023-08-24 01:38:27,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:27,666 INFO L124 PetriNetUnfolderBase]: 1619/2781 cut-off events. [2023-08-24 01:38:27,666 INFO L125 PetriNetUnfolderBase]: For 813/813 co-relation queries the response was YES. [2023-08-24 01:38:27,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6589 conditions, 2781 events. 1619/2781 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15503 event pairs, 331 based on Foata normal form. 2/2717 useless extension candidates. Maximal degree in co-relation 6565. Up to 1462 conditions per place. [2023-08-24 01:38:27,675 INFO L140 encePairwiseOnDemand]: 327/334 looper letters, 88 selfloop transitions, 11 changer transitions 27/141 dead transitions. [2023-08-24 01:38:27,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 141 transitions, 733 flow [2023-08-24 01:38:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 01:38:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 01:38:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1298 transitions. [2023-08-24 01:38:27,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318030605455755 [2023-08-24 01:38:27,678 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1298 transitions. [2023-08-24 01:38:27,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1298 transitions. [2023-08-24 01:38:27,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:27,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1298 transitions. [2023-08-24 01:38:27,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 144.22222222222223) internal successors, (1298), 9 states have internal predecessors, (1298), 0 states have call successors, (0), 0 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 01:38:27,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:27,684 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:27,684 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 194 flow. Second operand 9 states and 1298 transitions. [2023-08-24 01:38:27,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 141 transitions, 733 flow [2023-08-24 01:38:27,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 141 transitions, 729 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 01:38:27,689 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 255 flow [2023-08-24 01:38:27,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=255, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-24 01:38:27,689 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2023-08-24 01:38:27,689 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 255 flow [2023-08-24 01:38:27,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:27,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:27,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:27,696 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 01:38:27,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:27,897 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:27,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1795658102, now seen corresponding path program 5 times [2023-08-24 01:38:27,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:27,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933962908] [2023-08-24 01:38:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:27,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:38:28,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:28,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933962908] [2023-08-24 01:38:28,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933962908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:28,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884238191] [2023-08-24 01:38:28,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 01:38:28,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:28,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:28,207 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 01:38:28,209 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 01:38:28,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 01:38:28,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:38:28,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-24 01:38:28,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:28,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-24 01:38:28,349 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 01:38:28,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 01:38:28,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 01:38:28,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 01:38:28,520 INFO L322 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-08-24 01:38:28,521 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2023-08-24 01:38:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:38:28,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 01:38:28,801 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~f~0.offset (* c_~j~0 4)))) (and (forall ((v_ArrVal_182 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_182) c_~f~0.base))) (let ((.cse0 (select .cse1 .cse2))) (or (<= c_~n~0 .cse0) (< c_~n~0 (+ (select .cse1 (+ (* .cse0 4) c_~f~0.offset)) 2)) (< .cse0 0))))) (forall ((v_ArrVal_182 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_182) c_~f~0.base))) (let ((.cse3 (select .cse4 .cse2))) (or (<= c_~n~0 .cse3) (< (select .cse4 (+ (* .cse3 4) c_~f~0.offset)) 1) (< .cse3 0))))))) is different from false [2023-08-24 01:38:28,861 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~f~0.offset (* c_~j~0 4)))) (and (forall ((v_ArrVal_182 (Array Int Int)) (v_ArrVal_181 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_181) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_182) c_~f~0.base))) (let ((.cse1 (select .cse0 .cse2))) (or (< c_~n~0 (+ 2 (select .cse0 (+ c_~f~0.offset (* .cse1 4))))) (<= c_~n~0 .cse1) (< .cse1 0))))) (forall ((v_ArrVal_182 (Array Int Int)) (v_ArrVal_181 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_181) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_182) c_~f~0.base))) (let ((.cse4 (select .cse3 .cse2))) (or (< (select .cse3 (+ c_~f~0.offset (* .cse4 4))) 1) (<= c_~n~0 .cse4) (< .cse4 0))))))) is different from false [2023-08-24 01:38:29,075 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:29,076 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 126 treesize of output 90 [2023-08-24 01:38:29,091 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:29,091 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 8160 treesize of output 7668 [2023-08-24 01:38:29,138 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:29,138 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 242 [2023-08-24 01:38:29,162 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:29,162 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 170 [2023-08-24 01:38:29,186 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:29,186 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 283 treesize of output 167 [2023-08-24 01:38:29,201 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 01:38:31,684 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 01:38:31,685 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 128 treesize of output 1 [2023-08-24 01:38:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:38:31,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884238191] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 01:38:31,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 01:38:31,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 19 [2023-08-24 01:38:31,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853691109] [2023-08-24 01:38:31,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 01:38:31,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 01:38:31,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:31,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 01:38:31,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=276, Unknown=2, NotChecked=70, Total=420 [2023-08-24 01:38:31,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 334 [2023-08-24 01:38:31,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 255 flow. Second operand has 21 states, 21 states have (on average 112.76190476190476) internal successors, (2368), 21 states have internal predecessors, (2368), 0 states have call successors, (0), 0 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 01:38:31,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:31,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 334 [2023-08-24 01:38:31,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:32,472 INFO L124 PetriNetUnfolderBase]: 3484/6039 cut-off events. [2023-08-24 01:38:32,472 INFO L125 PetriNetUnfolderBase]: For 3063/3065 co-relation queries the response was YES. [2023-08-24 01:38:32,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16358 conditions, 6039 events. 3484/6039 cut-off events. For 3063/3065 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 40075 event pairs, 1008 based on Foata normal form. 12/5927 useless extension candidates. Maximal degree in co-relation 16324. Up to 2153 conditions per place. [2023-08-24 01:38:32,546 INFO L140 encePairwiseOnDemand]: 324/334 looper letters, 51 selfloop transitions, 7 changer transitions 141/214 dead transitions. [2023-08-24 01:38:32,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 214 transitions, 1227 flow [2023-08-24 01:38:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 01:38:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 01:38:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1342 transitions. [2023-08-24 01:38:32,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3652694610778443 [2023-08-24 01:38:32,549 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1342 transitions. [2023-08-24 01:38:32,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1342 transitions. [2023-08-24 01:38:32,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:32,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1342 transitions. [2023-08-24 01:38:32,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 122.0) internal successors, (1342), 11 states have internal predecessors, (1342), 0 states have call successors, (0), 0 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 01:38:32,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 334.0) internal successors, (4008), 12 states have internal predecessors, (4008), 0 states have call successors, (0), 0 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 01:38:32,556 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 334.0) internal successors, (4008), 12 states have internal predecessors, (4008), 0 states have call successors, (0), 0 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 01:38:32,556 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 255 flow. Second operand 11 states and 1342 transitions. [2023-08-24 01:38:32,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 214 transitions, 1227 flow [2023-08-24 01:38:32,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 214 transitions, 1225 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 01:38:32,566 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 329 flow [2023-08-24 01:38:32,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=329, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2023-08-24 01:38:32,567 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2023-08-24 01:38:32,567 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 329 flow [2023-08-24 01:38:32,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 112.76190476190476) internal successors, (2368), 21 states have internal predecessors, (2368), 0 states have call successors, (0), 0 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 01:38:32,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:32,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:32,578 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 01:38:32,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-24 01:38:32,772 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:32,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:32,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1402955083, now seen corresponding path program 6 times [2023-08-24 01:38:32,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:32,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216864199] [2023-08-24 01:38:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:32,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:38:33,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216864199] [2023-08-24 01:38:33,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216864199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833510517] [2023-08-24 01:38:33,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 01:38:33,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:33,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:33,499 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 01:38:33,501 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 01:38:33,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 01:38:33,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:38:33,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 01:38:33,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:33,701 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:33,701 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:33,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:38:33,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833510517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:33,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:38:33,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-08-24 01:38:33,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114692740] [2023-08-24 01:38:33,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:33,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:33,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2023-08-24 01:38:33,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 334 [2023-08-24 01:38:33,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:33,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:33,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 334 [2023-08-24 01:38:33,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:34,258 INFO L124 PetriNetUnfolderBase]: 1975/3456 cut-off events. [2023-08-24 01:38:34,259 INFO L125 PetriNetUnfolderBase]: For 5818/5818 co-relation queries the response was YES. [2023-08-24 01:38:34,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12104 conditions, 3456 events. 1975/3456 cut-off events. For 5818/5818 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20756 event pairs, 387 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 12064. Up to 1439 conditions per place. [2023-08-24 01:38:34,280 INFO L140 encePairwiseOnDemand]: 327/334 looper letters, 119 selfloop transitions, 11 changer transitions 29/174 dead transitions. [2023-08-24 01:38:34,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 174 transitions, 1166 flow [2023-08-24 01:38:34,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 01:38:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 01:38:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1314 transitions. [2023-08-24 01:38:34,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437125748502994 [2023-08-24 01:38:34,283 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1314 transitions. [2023-08-24 01:38:34,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1314 transitions. [2023-08-24 01:38:34,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:34,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1314 transitions. [2023-08-24 01:38:34,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 146.0) internal successors, (1314), 9 states have internal predecessors, (1314), 0 states have call successors, (0), 0 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 01:38:34,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:34,290 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:34,290 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 329 flow. Second operand 9 states and 1314 transitions. [2023-08-24 01:38:34,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 174 transitions, 1166 flow [2023-08-24 01:38:34,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 174 transitions, 1108 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-08-24 01:38:34,307 INFO L231 Difference]: Finished difference. Result has 86 places, 68 transitions, 397 flow [2023-08-24 01:38:34,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=397, PETRI_PLACES=86, PETRI_TRANSITIONS=68} [2023-08-24 01:38:34,307 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2023-08-24 01:38:34,307 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 68 transitions, 397 flow [2023-08-24 01:38:34,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:34,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:34,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:34,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 01:38:34,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:34,513 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:34,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:34,514 INFO L85 PathProgramCache]: Analyzing trace with hash 317931343, now seen corresponding path program 7 times [2023-08-24 01:38:34,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:34,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187573429] [2023-08-24 01:38:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:34,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:35,139 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 01:38:35,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:35,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187573429] [2023-08-24 01:38:35,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187573429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:35,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127585841] [2023-08-24 01:38:35,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 01:38:35,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:35,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:35,142 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 01:38:35,144 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 01:38:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:35,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 01:38:35,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:35,339 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:35,339 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:38:35,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 01:38:35,437 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-24 01:38:35,437 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-24 01:38:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:35,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127585841] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:35,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 01:38:35,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 18 [2023-08-24 01:38:35,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612614971] [2023-08-24 01:38:35,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:35,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:35,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-08-24 01:38:35,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 334 [2023-08-24 01:38:35,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 68 transitions, 397 flow. Second operand has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:35,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:35,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 334 [2023-08-24 01:38:35,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:35,965 INFO L124 PetriNetUnfolderBase]: 2506/4319 cut-off events. [2023-08-24 01:38:35,965 INFO L125 PetriNetUnfolderBase]: For 10865/10865 co-relation queries the response was YES. [2023-08-24 01:38:35,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16267 conditions, 4319 events. 2506/4319 cut-off events. For 10865/10865 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 26425 event pairs, 481 based on Foata normal form. 2/4255 useless extension candidates. Maximal degree in co-relation 16225. Up to 2355 conditions per place. [2023-08-24 01:38:35,989 INFO L140 encePairwiseOnDemand]: 325/334 looper letters, 120 selfloop transitions, 18 changer transitions 21/174 dead transitions. [2023-08-24 01:38:35,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 174 transitions, 1201 flow [2023-08-24 01:38:35,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 01:38:35,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 01:38:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1181 transitions. [2023-08-24 01:38:35,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44199101796407186 [2023-08-24 01:38:35,992 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1181 transitions. [2023-08-24 01:38:35,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1181 transitions. [2023-08-24 01:38:35,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:35,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1181 transitions. [2023-08-24 01:38:35,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 147.625) internal successors, (1181), 8 states have internal predecessors, (1181), 0 states have call successors, (0), 0 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 01:38:35,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:38:35,997 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:38:35,997 INFO L175 Difference]: Start difference. First operand has 86 places, 68 transitions, 397 flow. Second operand 8 states and 1181 transitions. [2023-08-24 01:38:35,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 174 transitions, 1201 flow [2023-08-24 01:38:36,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 174 transitions, 1162 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-24 01:38:36,023 INFO L231 Difference]: Finished difference. Result has 92 places, 78 transitions, 519 flow [2023-08-24 01:38:36,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=519, PETRI_PLACES=92, PETRI_TRANSITIONS=78} [2023-08-24 01:38:36,025 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2023-08-24 01:38:36,025 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 78 transitions, 519 flow [2023-08-24 01:38:36,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:36,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:36,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:36,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 01:38:36,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:36,230 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:36,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:36,231 INFO L85 PathProgramCache]: Analyzing trace with hash 662217559, now seen corresponding path program 8 times [2023-08-24 01:38:36,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:36,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72002763] [2023-08-24 01:38:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:36,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:36,763 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 01:38:36,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:36,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72002763] [2023-08-24 01:38:36,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72002763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:36,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538691700] [2023-08-24 01:38:36,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 01:38:36,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:36,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:36,765 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 01:38:36,767 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 01:38:36,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 01:38:36,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:38:36,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 01:38:36,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:36,961 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:36,961 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:36,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:38:36,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538691700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:36,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:38:36,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-08-24 01:38:36,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477855486] [2023-08-24 01:38:36,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:36,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:36,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:36,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:36,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-08-24 01:38:36,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 334 [2023-08-24 01:38:36,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 78 transitions, 519 flow. Second operand has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:36,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:36,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 334 [2023-08-24 01:38:36,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:37,549 INFO L124 PetriNetUnfolderBase]: 2602/4565 cut-off events. [2023-08-24 01:38:37,549 INFO L125 PetriNetUnfolderBase]: For 12680/12680 co-relation queries the response was YES. [2023-08-24 01:38:37,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18267 conditions, 4565 events. 2602/4565 cut-off events. For 12680/12680 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 29297 event pairs, 400 based on Foata normal form. 2/4506 useless extension candidates. Maximal degree in co-relation 18222. Up to 2218 conditions per place. [2023-08-24 01:38:37,570 INFO L140 encePairwiseOnDemand]: 325/334 looper letters, 122 selfloop transitions, 17 changer transitions 27/181 dead transitions. [2023-08-24 01:38:37,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 181 transitions, 1339 flow [2023-08-24 01:38:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 01:38:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 01:38:37,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1315 transitions. [2023-08-24 01:38:37,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4374584165003327 [2023-08-24 01:38:37,573 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1315 transitions. [2023-08-24 01:38:37,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1315 transitions. [2023-08-24 01:38:37,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:37,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1315 transitions. [2023-08-24 01:38:37,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 146.11111111111111) internal successors, (1315), 9 states have internal predecessors, (1315), 0 states have call successors, (0), 0 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 01:38:37,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:37,579 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:37,579 INFO L175 Difference]: Start difference. First operand has 92 places, 78 transitions, 519 flow. Second operand 9 states and 1315 transitions. [2023-08-24 01:38:37,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 181 transitions, 1339 flow [2023-08-24 01:38:37,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 181 transitions, 1283 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-24 01:38:37,620 INFO L231 Difference]: Finished difference. Result has 98 places, 79 transitions, 526 flow [2023-08-24 01:38:37,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=526, PETRI_PLACES=98, PETRI_TRANSITIONS=79} [2023-08-24 01:38:37,621 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 53 predicate places. [2023-08-24 01:38:37,621 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 79 transitions, 526 flow [2023-08-24 01:38:37,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:37,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:37,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:37,631 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 01:38:37,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:37,828 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:37,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash 152352295, now seen corresponding path program 9 times [2023-08-24 01:38:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:37,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896806284] [2023-08-24 01:38:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:37,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:38,232 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 01:38:38,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896806284] [2023-08-24 01:38:38,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896806284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060920073] [2023-08-24 01:38:38,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 01:38:38,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:38,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:38,234 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 01:38:38,234 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 01:38:38,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 01:38:38,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:38:38,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 01:38:38,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:38,424 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:38,424 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:38,431 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:38:38,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060920073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:38,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:38:38,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-08-24 01:38:38,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589500552] [2023-08-24 01:38:38,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:38,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:38,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:38,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:38,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-08-24 01:38:38,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 334 [2023-08-24 01:38:38,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 79 transitions, 526 flow. Second operand has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:38,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:38,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 334 [2023-08-24 01:38:38,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:38,964 INFO L124 PetriNetUnfolderBase]: 2586/4549 cut-off events. [2023-08-24 01:38:38,964 INFO L125 PetriNetUnfolderBase]: For 13153/13153 co-relation queries the response was YES. [2023-08-24 01:38:38,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17929 conditions, 4549 events. 2586/4549 cut-off events. For 13153/13153 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 29207 event pairs, 384 based on Foata normal form. 2/4490 useless extension candidates. Maximal degree in co-relation 17882. Up to 2595 conditions per place. [2023-08-24 01:38:38,986 INFO L140 encePairwiseOnDemand]: 325/334 looper letters, 117 selfloop transitions, 17 changer transitions 33/182 dead transitions. [2023-08-24 01:38:38,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 182 transitions, 1337 flow [2023-08-24 01:38:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 01:38:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 01:38:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1453 transitions. [2023-08-24 01:38:38,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4350299401197605 [2023-08-24 01:38:38,989 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1453 transitions. [2023-08-24 01:38:38,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1453 transitions. [2023-08-24 01:38:38,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:38,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1453 transitions. [2023-08-24 01:38:38,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 145.3) internal successors, (1453), 10 states have internal predecessors, (1453), 0 states have call successors, (0), 0 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 01:38:38,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 334.0) internal successors, (3674), 11 states have internal predecessors, (3674), 0 states have call successors, (0), 0 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 01:38:38,995 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 334.0) internal successors, (3674), 11 states have internal predecessors, (3674), 0 states have call successors, (0), 0 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 01:38:38,995 INFO L175 Difference]: Start difference. First operand has 98 places, 79 transitions, 526 flow. Second operand 10 states and 1453 transitions. [2023-08-24 01:38:38,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 182 transitions, 1337 flow [2023-08-24 01:38:39,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 182 transitions, 1275 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-08-24 01:38:39,049 INFO L231 Difference]: Finished difference. Result has 100 places, 78 transitions, 506 flow [2023-08-24 01:38:39,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=506, PETRI_PLACES=100, PETRI_TRANSITIONS=78} [2023-08-24 01:38:39,050 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2023-08-24 01:38:39,050 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 78 transitions, 506 flow [2023-08-24 01:38:39,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:39,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:39,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:39,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 01:38:39,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:39,257 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:39,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:39,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1857611455, now seen corresponding path program 10 times [2023-08-24 01:38:39,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:39,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693067538] [2023-08-24 01:38:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:39,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:39,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:39,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693067538] [2023-08-24 01:38:39,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693067538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:39,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:38:39,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 01:38:39,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409653458] [2023-08-24 01:38:39,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:39,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:39,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:39,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-24 01:38:39,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 334 [2023-08-24 01:38:39,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 78 transitions, 506 flow. Second operand has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:39,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:39,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 334 [2023-08-24 01:38:39,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:40,067 INFO L124 PetriNetUnfolderBase]: 3632/6650 cut-off events. [2023-08-24 01:38:40,068 INFO L125 PetriNetUnfolderBase]: For 20586/20949 co-relation queries the response was YES. [2023-08-24 01:38:40,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26100 conditions, 6650 events. 3632/6650 cut-off events. For 20586/20949 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 46272 event pairs, 1435 based on Foata normal form. 80/6675 useless extension candidates. Maximal degree in co-relation 26053. Up to 4257 conditions per place. [2023-08-24 01:38:40,099 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 189 selfloop transitions, 17 changer transitions 7/222 dead transitions. [2023-08-24 01:38:40,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 222 transitions, 1957 flow [2023-08-24 01:38:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 01:38:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 01:38:40,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1693 transitions. [2023-08-24 01:38:40,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608056614044638 [2023-08-24 01:38:40,102 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1693 transitions. [2023-08-24 01:38:40,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1693 transitions. [2023-08-24 01:38:40,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:40,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1693 transitions. [2023-08-24 01:38:40,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 153.9090909090909) internal successors, (1693), 11 states have internal predecessors, (1693), 0 states have call successors, (0), 0 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 01:38:40,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 334.0) internal successors, (4008), 12 states have internal predecessors, (4008), 0 states have call successors, (0), 0 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 01:38:40,117 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 334.0) internal successors, (4008), 12 states have internal predecessors, (4008), 0 states have call successors, (0), 0 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 01:38:40,117 INFO L175 Difference]: Start difference. First operand has 100 places, 78 transitions, 506 flow. Second operand 11 states and 1693 transitions. [2023-08-24 01:38:40,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 222 transitions, 1957 flow [2023-08-24 01:38:40,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 222 transitions, 1821 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-08-24 01:38:40,177 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 621 flow [2023-08-24 01:38:40,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=621, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2023-08-24 01:38:40,178 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2023-08-24 01:38:40,178 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 621 flow [2023-08-24 01:38:40,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:40,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:40,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:40,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 01:38:40,178 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:40,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:40,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1533666281, now seen corresponding path program 11 times [2023-08-24 01:38:40,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:40,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269053811] [2023-08-24 01:38:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:40,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:40,737 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 01:38:40,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:40,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269053811] [2023-08-24 01:38:40,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269053811] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:40,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731336741] [2023-08-24 01:38:40,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 01:38:40,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:40,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:40,739 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 01:38:40,739 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 01:38:40,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 01:38:40,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:38:40,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 01:38:40,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:40,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:38:40,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:38:40,998 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:40,998 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:38:41,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 01:38:41,072 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_447 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_447) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* c_~i~0 4))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* c_~j~0 4))) 4)))))) is different from false [2023-08-24 01:38:41,101 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:41,102 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-24 01:38:41,116 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:41,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 52 [2023-08-24 01:38:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:41,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731336741] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:41,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 01:38:41,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 9] total 25 [2023-08-24 01:38:41,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380754436] [2023-08-24 01:38:41,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:41,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 01:38:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 01:38:41,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=579, Unknown=1, NotChecked=48, Total=702 [2023-08-24 01:38:41,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 334 [2023-08-24 01:38:41,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 92 transitions, 621 flow. Second operand has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:38:41,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:41,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 334 [2023-08-24 01:38:41,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:42,189 INFO L124 PetriNetUnfolderBase]: 4467/7894 cut-off events. [2023-08-24 01:38:42,189 INFO L125 PetriNetUnfolderBase]: For 22921/22922 co-relation queries the response was YES. [2023-08-24 01:38:42,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31620 conditions, 7894 events. 4467/7894 cut-off events. For 22921/22922 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 55649 event pairs, 842 based on Foata normal form. 5/7810 useless extension candidates. Maximal degree in co-relation 31568. Up to 3091 conditions per place. [2023-08-24 01:38:42,225 INFO L140 encePairwiseOnDemand]: 317/334 looper letters, 144 selfloop transitions, 40 changer transitions 33/241 dead transitions. [2023-08-24 01:38:42,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 241 transitions, 1960 flow [2023-08-24 01:38:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 01:38:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 01:38:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1518 transitions. [2023-08-24 01:38:42,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41317365269461076 [2023-08-24 01:38:42,229 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1518 transitions. [2023-08-24 01:38:42,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1518 transitions. [2023-08-24 01:38:42,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:42,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1518 transitions. [2023-08-24 01:38:42,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 138.0) internal successors, (1518), 11 states have internal predecessors, (1518), 0 states have call successors, (0), 0 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 01:38:42,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 334.0) internal successors, (4008), 12 states have internal predecessors, (4008), 0 states have call successors, (0), 0 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 01:38:42,234 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 334.0) internal successors, (4008), 12 states have internal predecessors, (4008), 0 states have call successors, (0), 0 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 01:38:42,234 INFO L175 Difference]: Start difference. First operand has 105 places, 92 transitions, 621 flow. Second operand 11 states and 1518 transitions. [2023-08-24 01:38:42,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 241 transitions, 1960 flow [2023-08-24 01:38:42,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 241 transitions, 1958 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-24 01:38:42,344 INFO L231 Difference]: Finished difference. Result has 120 places, 117 transitions, 987 flow [2023-08-24 01:38:42,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=987, PETRI_PLACES=120, PETRI_TRANSITIONS=117} [2023-08-24 01:38:42,344 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2023-08-24 01:38:42,345 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 117 transitions, 987 flow [2023-08-24 01:38:42,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:38:42,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:42,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:42,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-24 01:38:42,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:42,550 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:42,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:42,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2052217417, now seen corresponding path program 12 times [2023-08-24 01:38:42,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:42,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194130440] [2023-08-24 01:38:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:42,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:43,291 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 01:38:43,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:43,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194130440] [2023-08-24 01:38:43,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194130440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:43,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294605308] [2023-08-24 01:38:43,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 01:38:43,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:43,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:43,293 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 01:38:43,295 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 01:38:43,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 01:38:43,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:38:43,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 01:38:43,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:43,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:38:43,515 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:38:43,579 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:43,579 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:43,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:38:43,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294605308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:43,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:38:43,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2023-08-24 01:38:43,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030051470] [2023-08-24 01:38:43,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:43,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 01:38:43,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 01:38:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2023-08-24 01:38:43,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 334 [2023-08-24 01:38:43,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 117 transitions, 987 flow. Second operand has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:38:43,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:43,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 334 [2023-08-24 01:38:43,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:44,606 INFO L124 PetriNetUnfolderBase]: 4744/8402 cut-off events. [2023-08-24 01:38:44,606 INFO L125 PetriNetUnfolderBase]: For 37025/37029 co-relation queries the response was YES. [2023-08-24 01:38:44,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40250 conditions, 8402 events. 4744/8402 cut-off events. For 37025/37029 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 60030 event pairs, 860 based on Foata normal form. 5/8323 useless extension candidates. Maximal degree in co-relation 40191. Up to 4336 conditions per place. [2023-08-24 01:38:44,648 INFO L140 encePairwiseOnDemand]: 325/334 looper letters, 186 selfloop transitions, 24 changer transitions 22/256 dead transitions. [2023-08-24 01:38:44,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 256 transitions, 2453 flow [2023-08-24 01:38:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 01:38:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 01:38:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1516 transitions. [2023-08-24 01:38:44,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126292868807839 [2023-08-24 01:38:44,651 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1516 transitions. [2023-08-24 01:38:44,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1516 transitions. [2023-08-24 01:38:44,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:44,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1516 transitions. [2023-08-24 01:38:44,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 137.8181818181818) internal successors, (1516), 11 states have internal predecessors, (1516), 0 states have call successors, (0), 0 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 01:38:44,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 334.0) internal successors, (4008), 12 states have internal predecessors, (4008), 0 states have call successors, (0), 0 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 01:38:44,657 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 334.0) internal successors, (4008), 12 states have internal predecessors, (4008), 0 states have call successors, (0), 0 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 01:38:44,657 INFO L175 Difference]: Start difference. First operand has 120 places, 117 transitions, 987 flow. Second operand 11 states and 1516 transitions. [2023-08-24 01:38:44,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 256 transitions, 2453 flow [2023-08-24 01:38:44,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 256 transitions, 2390 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-24 01:38:44,886 INFO L231 Difference]: Finished difference. Result has 125 places, 120 transitions, 1059 flow [2023-08-24 01:38:44,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1059, PETRI_PLACES=125, PETRI_TRANSITIONS=120} [2023-08-24 01:38:44,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2023-08-24 01:38:44,887 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 120 transitions, 1059 flow [2023-08-24 01:38:44,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:38:44,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:44,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:44,893 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 01:38:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 01:38:45,092 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:45,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1296904905, now seen corresponding path program 13 times [2023-08-24 01:38:45,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:45,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497995609] [2023-08-24 01:38:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:45,768 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 01:38:45,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:45,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497995609] [2023-08-24 01:38:45,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497995609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:45,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528643773] [2023-08-24 01:38:45,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 01:38:45,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:45,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:45,770 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 01:38:45,772 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 01:38:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:45,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 01:38:45,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:45,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:38:45,988 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:38:46,050 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:46,050 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:38:46,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 01:38:46,109 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_545 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_545) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* c_~j~0 4))) 4))) (select .cse0 (+ c_~f~0.offset (* c_~i~0 4)))))) is different from false [2023-08-24 01:38:46,134 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:46,134 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-24 01:38:46,151 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:46,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 60 [2023-08-24 01:38:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:46,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528643773] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:46,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 01:38:46,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 26 [2023-08-24 01:38:46,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045310469] [2023-08-24 01:38:46,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:46,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 01:38:46,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 01:38:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=627, Unknown=1, NotChecked=50, Total=756 [2023-08-24 01:38:46,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 334 [2023-08-24 01:38:46,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 120 transitions, 1059 flow. Second operand has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:38:46,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:46,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 334 [2023-08-24 01:38:46,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:49,276 INFO L124 PetriNetUnfolderBase]: 4637/8179 cut-off events. [2023-08-24 01:38:49,276 INFO L125 PetriNetUnfolderBase]: For 39276/39280 co-relation queries the response was YES. [2023-08-24 01:38:49,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40281 conditions, 8179 events. 4637/8179 cut-off events. For 39276/39280 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 58007 event pairs, 860 based on Foata normal form. 5/8100 useless extension candidates. Maximal degree in co-relation 40221. Up to 4336 conditions per place. [2023-08-24 01:38:49,316 INFO L140 encePairwiseOnDemand]: 325/334 looper letters, 124 selfloop transitions, 18 changer transitions 67/233 dead transitions. [2023-08-24 01:38:49,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 233 transitions, 2263 flow [2023-08-24 01:38:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 01:38:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 01:38:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1250 transitions. [2023-08-24 01:38:49,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41583499667332 [2023-08-24 01:38:49,318 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1250 transitions. [2023-08-24 01:38:49,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1250 transitions. [2023-08-24 01:38:49,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:49,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1250 transitions. [2023-08-24 01:38:49,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 138.88888888888889) internal successors, (1250), 9 states have internal predecessors, (1250), 0 states have call successors, (0), 0 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 01:38:49,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:49,323 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:49,323 INFO L175 Difference]: Start difference. First operand has 125 places, 120 transitions, 1059 flow. Second operand 9 states and 1250 transitions. [2023-08-24 01:38:49,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 233 transitions, 2263 flow [2023-08-24 01:38:49,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 233 transitions, 2201 flow, removed 16 selfloop flow, removed 7 redundant places. [2023-08-24 01:38:49,612 INFO L231 Difference]: Finished difference. Result has 126 places, 106 transitions, 903 flow [2023-08-24 01:38:49,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=903, PETRI_PLACES=126, PETRI_TRANSITIONS=106} [2023-08-24 01:38:49,613 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 81 predicate places. [2023-08-24 01:38:49,613 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 106 transitions, 903 flow [2023-08-24 01:38:49,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:38:49,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:49,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:49,618 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 01:38:49,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 01:38:49,814 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:49,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:49,814 INFO L85 PathProgramCache]: Analyzing trace with hash -220693867, now seen corresponding path program 14 times [2023-08-24 01:38:49,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:49,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863587993] [2023-08-24 01:38:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:49,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:49,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:49,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863587993] [2023-08-24 01:38:49,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863587993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:49,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:38:49,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 01:38:49,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36178308] [2023-08-24 01:38:49,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:49,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:49,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:49,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-24 01:38:49,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 334 [2023-08-24 01:38:49,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 106 transitions, 903 flow. Second operand has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:49,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:49,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 334 [2023-08-24 01:38:49,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:50,899 INFO L124 PetriNetUnfolderBase]: 4286/7957 cut-off events. [2023-08-24 01:38:50,900 INFO L125 PetriNetUnfolderBase]: For 41857/41911 co-relation queries the response was YES. [2023-08-24 01:38:50,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38522 conditions, 7957 events. 4286/7957 cut-off events. For 41857/41911 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 57737 event pairs, 1924 based on Foata normal form. 46/7967 useless extension candidates. Maximal degree in co-relation 38463. Up to 5378 conditions per place. [2023-08-24 01:38:50,936 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 175 selfloop transitions, 15 changer transitions 27/225 dead transitions. [2023-08-24 01:38:50,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 225 transitions, 2355 flow [2023-08-24 01:38:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 01:38:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 01:38:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1394 transitions. [2023-08-24 01:38:50,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637391882900865 [2023-08-24 01:38:50,938 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1394 transitions. [2023-08-24 01:38:50,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1394 transitions. [2023-08-24 01:38:50,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:50,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1394 transitions. [2023-08-24 01:38:50,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 154.88888888888889) internal successors, (1394), 9 states have internal predecessors, (1394), 0 states have call successors, (0), 0 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 01:38:50,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:50,942 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:50,942 INFO L175 Difference]: Start difference. First operand has 126 places, 106 transitions, 903 flow. Second operand 9 states and 1394 transitions. [2023-08-24 01:38:50,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 225 transitions, 2355 flow [2023-08-24 01:38:51,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 225 transitions, 2171 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-08-24 01:38:51,096 INFO L231 Difference]: Finished difference. Result has 122 places, 107 transitions, 914 flow [2023-08-24 01:38:51,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=914, PETRI_PLACES=122, PETRI_TRANSITIONS=107} [2023-08-24 01:38:51,096 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 77 predicate places. [2023-08-24 01:38:51,096 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 107 transitions, 914 flow [2023-08-24 01:38:51,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:51,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:51,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:51,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 01:38:51,097 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:51,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:51,097 INFO L85 PathProgramCache]: Analyzing trace with hash -832506469, now seen corresponding path program 15 times [2023-08-24 01:38:51,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:51,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929935396] [2023-08-24 01:38:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:51,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:51,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:51,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929935396] [2023-08-24 01:38:51,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929935396] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:51,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:38:51,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 01:38:51,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453957060] [2023-08-24 01:38:51,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:51,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:51,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:51,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:51,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-24 01:38:51,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 334 [2023-08-24 01:38:51,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 107 transitions, 914 flow. Second operand has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:51,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:51,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 334 [2023-08-24 01:38:51,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:51,817 INFO L124 PetriNetUnfolderBase]: 3150/5860 cut-off events. [2023-08-24 01:38:51,817 INFO L125 PetriNetUnfolderBase]: For 24268/24292 co-relation queries the response was YES. [2023-08-24 01:38:51,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27113 conditions, 5860 events. 3150/5860 cut-off events. For 24268/24292 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 40487 event pairs, 1540 based on Foata normal form. 46/5887 useless extension candidates. Maximal degree in co-relation 27052. Up to 5126 conditions per place. [2023-08-24 01:38:51,846 INFO L140 encePairwiseOnDemand]: 327/334 looper letters, 95 selfloop transitions, 7 changer transitions 41/151 dead transitions. [2023-08-24 01:38:51,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 151 transitions, 1464 flow [2023-08-24 01:38:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 01:38:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 01:38:51,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1222 transitions. [2023-08-24 01:38:51,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573353293413174 [2023-08-24 01:38:51,848 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1222 transitions. [2023-08-24 01:38:51,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1222 transitions. [2023-08-24 01:38:51,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:51,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1222 transitions. [2023-08-24 01:38:51,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 152.75) internal successors, (1222), 8 states have internal predecessors, (1222), 0 states have call successors, (0), 0 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 01:38:51,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:38:51,852 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:38:51,852 INFO L175 Difference]: Start difference. First operand has 122 places, 107 transitions, 914 flow. Second operand 8 states and 1222 transitions. [2023-08-24 01:38:51,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 151 transitions, 1464 flow [2023-08-24 01:38:51,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 151 transitions, 1420 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-08-24 01:38:51,977 INFO L231 Difference]: Finished difference. Result has 120 places, 97 transitions, 785 flow [2023-08-24 01:38:51,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=785, PETRI_PLACES=120, PETRI_TRANSITIONS=97} [2023-08-24 01:38:51,978 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2023-08-24 01:38:51,978 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 97 transitions, 785 flow [2023-08-24 01:38:51,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:51,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:51,978 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:51,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 01:38:51,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:51,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash 809701929, now seen corresponding path program 16 times [2023-08-24 01:38:51,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:51,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190127378] [2023-08-24 01:38:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:51,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:52,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:52,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190127378] [2023-08-24 01:38:52,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190127378] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:52,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:38:52,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 01:38:52,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026185491] [2023-08-24 01:38:52,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:52,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:52,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:52,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:52,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-24 01:38:52,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 334 [2023-08-24 01:38:52,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 97 transitions, 785 flow. Second operand has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:52,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:52,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 334 [2023-08-24 01:38:52,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:52,524 INFO L124 PetriNetUnfolderBase]: 2106/3909 cut-off events. [2023-08-24 01:38:52,524 INFO L125 PetriNetUnfolderBase]: For 14045/14077 co-relation queries the response was YES. [2023-08-24 01:38:52,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17330 conditions, 3909 events. 2106/3909 cut-off events. For 14045/14077 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 25103 event pairs, 1052 based on Foata normal form. 51/3949 useless extension candidates. Maximal degree in co-relation 17272. Up to 3242 conditions per place. [2023-08-24 01:38:52,539 INFO L140 encePairwiseOnDemand]: 327/334 looper letters, 84 selfloop transitions, 4 changer transitions 39/135 dead transitions. [2023-08-24 01:38:52,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 135 transitions, 1279 flow [2023-08-24 01:38:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 01:38:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 01:38:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1071 transitions. [2023-08-24 01:38:52,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45808383233532934 [2023-08-24 01:38:52,541 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1071 transitions. [2023-08-24 01:38:52,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1071 transitions. [2023-08-24 01:38:52,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:52,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1071 transitions. [2023-08-24 01:38:52,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.0) internal successors, (1071), 7 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 01:38:52,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 334.0) internal successors, (2672), 8 states have internal predecessors, (2672), 0 states have call successors, (0), 0 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 01:38:52,544 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 334.0) internal successors, (2672), 8 states have internal predecessors, (2672), 0 states have call successors, (0), 0 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 01:38:52,544 INFO L175 Difference]: Start difference. First operand has 120 places, 97 transitions, 785 flow. Second operand 7 states and 1071 transitions. [2023-08-24 01:38:52,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 135 transitions, 1279 flow [2023-08-24 01:38:52,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 135 transitions, 1245 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-24 01:38:52,599 INFO L231 Difference]: Finished difference. Result has 111 places, 87 transitions, 665 flow [2023-08-24 01:38:52,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=111, PETRI_TRANSITIONS=87} [2023-08-24 01:38:52,600 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2023-08-24 01:38:52,600 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 87 transitions, 665 flow [2023-08-24 01:38:52,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:52,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:52,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:52,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 01:38:52,600 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:52,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:52,601 INFO L85 PathProgramCache]: Analyzing trace with hash -179468551, now seen corresponding path program 17 times [2023-08-24 01:38:52,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:52,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520927025] [2023-08-24 01:38:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:52,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:52,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:52,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520927025] [2023-08-24 01:38:52,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520927025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:52,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:38:52,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 01:38:52,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436369831] [2023-08-24 01:38:52,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:52,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:52,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:52,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:52,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-24 01:38:52,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 334 [2023-08-24 01:38:52,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 87 transitions, 665 flow. Second operand has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:52,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:52,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 334 [2023-08-24 01:38:52,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:52,988 INFO L124 PetriNetUnfolderBase]: 1166/2309 cut-off events. [2023-08-24 01:38:52,988 INFO L125 PetriNetUnfolderBase]: For 7843/7857 co-relation queries the response was YES. [2023-08-24 01:38:52,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9764 conditions, 2309 events. 1166/2309 cut-off events. For 7843/7857 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14473 event pairs, 369 based on Foata normal form. 40/2342 useless extension candidates. Maximal degree in co-relation 9708. Up to 672 conditions per place. [2023-08-24 01:38:52,997 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 94 selfloop transitions, 20 changer transitions 21/142 dead transitions. [2023-08-24 01:38:52,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 142 transitions, 1271 flow [2023-08-24 01:38:52,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 01:38:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 01:38:52,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1237 transitions. [2023-08-24 01:38:52,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4629491017964072 [2023-08-24 01:38:52,999 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1237 transitions. [2023-08-24 01:38:52,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1237 transitions. [2023-08-24 01:38:52,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:52,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1237 transitions. [2023-08-24 01:38:53,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.625) internal successors, (1237), 8 states have internal predecessors, (1237), 0 states have call successors, (0), 0 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 01:38:53,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:38:53,002 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:38:53,002 INFO L175 Difference]: Start difference. First operand has 111 places, 87 transitions, 665 flow. Second operand 8 states and 1237 transitions. [2023-08-24 01:38:53,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 142 transitions, 1271 flow [2023-08-24 01:38:53,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1166 flow, removed 30 selfloop flow, removed 10 redundant places. [2023-08-24 01:38:53,022 INFO L231 Difference]: Finished difference. Result has 104 places, 65 transitions, 461 flow [2023-08-24 01:38:53,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=461, PETRI_PLACES=104, PETRI_TRANSITIONS=65} [2023-08-24 01:38:53,022 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2023-08-24 01:38:53,022 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 65 transitions, 461 flow [2023-08-24 01:38:53,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 01:38:53,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:53,023 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:53,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 01:38:53,023 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:53,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash 331687019, now seen corresponding path program 18 times [2023-08-24 01:38:53,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:53,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940688929] [2023-08-24 01:38:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:53,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:53,486 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 01:38:53,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:53,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940688929] [2023-08-24 01:38:53,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940688929] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:53,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458490722] [2023-08-24 01:38:53,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 01:38:53,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:53,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:53,490 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 01:38:53,492 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 01:38:53,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 01:38:53,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:38:53,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 01:38:53,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:53,726 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:53,726 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:53,735 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:38:53,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458490722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:53,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:38:53,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-08-24 01:38:53,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210030829] [2023-08-24 01:38:53,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:53,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:53,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-08-24 01:38:53,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 334 [2023-08-24 01:38:53,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 65 transitions, 461 flow. Second operand has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:53,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:53,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 334 [2023-08-24 01:38:53,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:54,090 INFO L124 PetriNetUnfolderBase]: 620/1265 cut-off events. [2023-08-24 01:38:54,091 INFO L125 PetriNetUnfolderBase]: For 3308/3339 co-relation queries the response was YES. [2023-08-24 01:38:54,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5031 conditions, 1265 events. 620/1265 cut-off events. For 3308/3339 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7406 event pairs, 320 based on Foata normal form. 3/1205 useless extension candidates. Maximal degree in co-relation 4979. Up to 791 conditions per place. [2023-08-24 01:38:54,096 INFO L140 encePairwiseOnDemand]: 327/334 looper letters, 53 selfloop transitions, 5 changer transitions 26/102 dead transitions. [2023-08-24 01:38:54,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 832 flow [2023-08-24 01:38:54,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 01:38:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 01:38:54,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1133 transitions. [2023-08-24 01:38:54,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4240269461077844 [2023-08-24 01:38:54,097 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1133 transitions. [2023-08-24 01:38:54,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1133 transitions. [2023-08-24 01:38:54,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:54,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1133 transitions. [2023-08-24 01:38:54,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 141.625) internal successors, (1133), 8 states have internal predecessors, (1133), 0 states have call successors, (0), 0 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 01:38:54,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:38:54,100 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:38:54,100 INFO L175 Difference]: Start difference. First operand has 104 places, 65 transitions, 461 flow. Second operand 8 states and 1133 transitions. [2023-08-24 01:38:54,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 832 flow [2023-08-24 01:38:54,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 771 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-08-24 01:38:54,106 INFO L231 Difference]: Finished difference. Result has 101 places, 65 transitions, 442 flow [2023-08-24 01:38:54,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=442, PETRI_PLACES=101, PETRI_TRANSITIONS=65} [2023-08-24 01:38:54,107 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2023-08-24 01:38:54,107 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 65 transitions, 442 flow [2023-08-24 01:38:54,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:54,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:54,107 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:54,113 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 01:38:54,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:54,312 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:54,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:54,312 INFO L85 PathProgramCache]: Analyzing trace with hash 130475829, now seen corresponding path program 19 times [2023-08-24 01:38:54,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:54,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385742977] [2023-08-24 01:38:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:54,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:54,891 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 01:38:54,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:54,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385742977] [2023-08-24 01:38:54,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385742977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:54,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917892700] [2023-08-24 01:38:54,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 01:38:54,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:54,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:54,893 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 01:38:54,895 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 01:38:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:54,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 01:38:54,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:55,110 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:55,111 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:38:55,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 01:38:55,198 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-24 01:38:55,199 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-24 01:38:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:55,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917892700] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:55,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 01:38:55,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 19 [2023-08-24 01:38:55,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955937593] [2023-08-24 01:38:55,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:55,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:55,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:55,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:55,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-08-24 01:38:55,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 334 [2023-08-24 01:38:55,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 65 transitions, 442 flow. Second operand has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:55,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:55,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 334 [2023-08-24 01:38:55,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:55,546 INFO L124 PetriNetUnfolderBase]: 605/1238 cut-off events. [2023-08-24 01:38:55,546 INFO L125 PetriNetUnfolderBase]: For 2608/2615 co-relation queries the response was YES. [2023-08-24 01:38:55,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4845 conditions, 1238 events. 605/1238 cut-off events. For 2608/2615 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7229 event pairs, 315 based on Foata normal form. 3/1178 useless extension candidates. Maximal degree in co-relation 4800. Up to 556 conditions per place. [2023-08-24 01:38:55,550 INFO L140 encePairwiseOnDemand]: 327/334 looper letters, 80 selfloop transitions, 5 changer transitions 24/127 dead transitions. [2023-08-24 01:38:55,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 127 transitions, 979 flow [2023-08-24 01:38:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 01:38:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 01:38:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1291 transitions. [2023-08-24 01:38:55,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42947438456420495 [2023-08-24 01:38:55,552 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1291 transitions. [2023-08-24 01:38:55,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1291 transitions. [2023-08-24 01:38:55,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:55,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1291 transitions. [2023-08-24 01:38:55,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.44444444444446) internal successors, (1291), 9 states have internal predecessors, (1291), 0 states have call successors, (0), 0 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 01:38:55,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:55,556 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:55,556 INFO L175 Difference]: Start difference. First operand has 101 places, 65 transitions, 442 flow. Second operand 9 states and 1291 transitions. [2023-08-24 01:38:55,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 127 transitions, 979 flow [2023-08-24 01:38:55,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 951 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-24 01:38:55,561 INFO L231 Difference]: Finished difference. Result has 103 places, 64 transitions, 438 flow [2023-08-24 01:38:55,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=438, PETRI_PLACES=103, PETRI_TRANSITIONS=64} [2023-08-24 01:38:55,562 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2023-08-24 01:38:55,562 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 64 transitions, 438 flow [2023-08-24 01:38:55,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:55,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:55,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:55,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 01:38:55,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:55,769 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:55,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:55,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1298397117, now seen corresponding path program 20 times [2023-08-24 01:38:55,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:55,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677679284] [2023-08-24 01:38:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:55,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:56,241 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 01:38:56,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:56,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677679284] [2023-08-24 01:38:56,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677679284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:56,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090936807] [2023-08-24 01:38:56,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 01:38:56,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:56,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:56,242 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 01:38:56,244 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 01:38:56,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 01:38:56,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:38:56,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 01:38:56,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:56,424 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:56,424 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:56,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:38:56,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090936807] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:56,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:38:56,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-08-24 01:38:56,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702405073] [2023-08-24 01:38:56,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:56,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:56,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:56,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:56,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-08-24 01:38:56,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 334 [2023-08-24 01:38:56,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 64 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:56,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:56,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 334 [2023-08-24 01:38:56,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:56,683 INFO L124 PetriNetUnfolderBase]: 595/1213 cut-off events. [2023-08-24 01:38:56,684 INFO L125 PetriNetUnfolderBase]: For 3204/3211 co-relation queries the response was YES. [2023-08-24 01:38:56,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4934 conditions, 1213 events. 595/1213 cut-off events. For 3204/3211 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6909 event pairs, 321 based on Foata normal form. 3/1161 useless extension candidates. Maximal degree in co-relation 4888. Up to 634 conditions per place. [2023-08-24 01:38:56,688 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 83 selfloop transitions, 12 changer transitions 15/128 dead transitions. [2023-08-24 01:38:56,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 128 transitions, 1013 flow [2023-08-24 01:38:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 01:38:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 01:38:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1156 transitions. [2023-08-24 01:38:56,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43263473053892215 [2023-08-24 01:38:56,690 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1156 transitions. [2023-08-24 01:38:56,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1156 transitions. [2023-08-24 01:38:56,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:56,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1156 transitions. [2023-08-24 01:38:56,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.5) internal successors, (1156), 8 states have internal predecessors, (1156), 0 states have call successors, (0), 0 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 01:38:56,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:38:56,692 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:38:56,692 INFO L175 Difference]: Start difference. First operand has 103 places, 64 transitions, 438 flow. Second operand 8 states and 1156 transitions. [2023-08-24 01:38:56,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 128 transitions, 1013 flow [2023-08-24 01:38:56,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 128 transitions, 966 flow, removed 20 selfloop flow, removed 8 redundant places. [2023-08-24 01:38:56,698 INFO L231 Difference]: Finished difference. Result has 102 places, 71 transitions, 502 flow [2023-08-24 01:38:56,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=502, PETRI_PLACES=102, PETRI_TRANSITIONS=71} [2023-08-24 01:38:56,698 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2023-08-24 01:38:56,698 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 71 transitions, 502 flow [2023-08-24 01:38:56,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:56,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:56,699 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:56,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-24 01:38:56,903 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,SelfDestructingSolverStorable20 [2023-08-24 01:38:56,903 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:56,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1438796401, now seen corresponding path program 21 times [2023-08-24 01:38:56,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:56,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864072312] [2023-08-24 01:38:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:56,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:58,076 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 01:38:58,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:58,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864072312] [2023-08-24 01:38:58,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864072312] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:58,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833068099] [2023-08-24 01:38:58,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 01:38:58,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:58,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:58,077 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 01:38:58,079 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 01:38:58,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 01:38:58,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:38:58,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 01:38:58,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:58,306 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:58,306 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:58,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:38:58,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833068099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:58,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:38:58,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 17 [2023-08-24 01:38:58,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339899036] [2023-08-24 01:38:58,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:58,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:58,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:58,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2023-08-24 01:38:58,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 334 [2023-08-24 01:38:58,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 71 transitions, 502 flow. Second operand has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:58,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:58,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 334 [2023-08-24 01:38:58,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:58,636 INFO L124 PetriNetUnfolderBase]: 596/1244 cut-off events. [2023-08-24 01:38:58,636 INFO L125 PetriNetUnfolderBase]: For 2897/2904 co-relation queries the response was YES. [2023-08-24 01:38:58,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5002 conditions, 1244 events. 596/1244 cut-off events. For 2897/2904 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7399 event pairs, 315 based on Foata normal form. 3/1192 useless extension candidates. Maximal degree in co-relation 4954. Up to 593 conditions per place. [2023-08-24 01:38:58,642 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 83 selfloop transitions, 11 changer transitions 16/128 dead transitions. [2023-08-24 01:38:58,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 128 transitions, 1048 flow [2023-08-24 01:38:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 01:38:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 01:38:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1286 transitions. [2023-08-24 01:38:58,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278110445775116 [2023-08-24 01:38:58,643 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1286 transitions. [2023-08-24 01:38:58,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1286 transitions. [2023-08-24 01:38:58,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:58,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1286 transitions. [2023-08-24 01:38:58,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 142.88888888888889) internal successors, (1286), 9 states have internal predecessors, (1286), 0 states have call successors, (0), 0 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 01:38:58,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:58,646 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:38:58,646 INFO L175 Difference]: Start difference. First operand has 102 places, 71 transitions, 502 flow. Second operand 9 states and 1286 transitions. [2023-08-24 01:38:58,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 128 transitions, 1048 flow [2023-08-24 01:38:58,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 128 transitions, 1011 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-24 01:38:58,653 INFO L231 Difference]: Finished difference. Result has 108 places, 72 transitions, 506 flow [2023-08-24 01:38:58,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=506, PETRI_PLACES=108, PETRI_TRANSITIONS=72} [2023-08-24 01:38:58,653 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2023-08-24 01:38:58,653 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 72 transitions, 506 flow [2023-08-24 01:38:58,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:58,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:58,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:58,661 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 01:38:58,859 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,SelfDestructingSolverStorable21 [2023-08-24 01:38:58,859 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:38:58,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:38:58,859 INFO L85 PathProgramCache]: Analyzing trace with hash -209449967, now seen corresponding path program 22 times [2023-08-24 01:38:58,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:38:58,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531308194] [2023-08-24 01:38:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:38:58,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:38:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:38:59,389 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 01:38:59,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:38:59,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531308194] [2023-08-24 01:38:59,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531308194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:38:59,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890052076] [2023-08-24 01:38:59,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 01:38:59,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:38:59,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:38:59,397 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 01:38:59,399 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 01:38:59,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 01:38:59,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:38:59,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 01:38:59,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:38:59,571 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:38:59,571 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:38:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:38:59,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:38:59,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890052076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:38:59,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:38:59,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-08-24 01:38:59,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141187614] [2023-08-24 01:38:59,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:38:59,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 01:38:59,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:38:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 01:38:59,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-08-24 01:38:59,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 334 [2023-08-24 01:38:59,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 72 transitions, 506 flow. Second operand has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:59,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:38:59,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 334 [2023-08-24 01:38:59,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:38:59,866 INFO L124 PetriNetUnfolderBase]: 590/1234 cut-off events. [2023-08-24 01:38:59,867 INFO L125 PetriNetUnfolderBase]: For 2905/2912 co-relation queries the response was YES. [2023-08-24 01:38:59,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4918 conditions, 1234 events. 590/1234 cut-off events. For 2905/2912 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7359 event pairs, 319 based on Foata normal form. 3/1182 useless extension candidates. Maximal degree in co-relation 4873. Up to 665 conditions per place. [2023-08-24 01:38:59,871 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 73 selfloop transitions, 10 changer transitions 29/130 dead transitions. [2023-08-24 01:38:59,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 130 transitions, 1045 flow [2023-08-24 01:38:59,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 01:38:59,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 01:38:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1424 transitions. [2023-08-24 01:38:59,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42634730538922155 [2023-08-24 01:38:59,873 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1424 transitions. [2023-08-24 01:38:59,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1424 transitions. [2023-08-24 01:38:59,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:38:59,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1424 transitions. [2023-08-24 01:38:59,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 142.4) internal successors, (1424), 10 states have internal predecessors, (1424), 0 states have call successors, (0), 0 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 01:38:59,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 334.0) internal successors, (3674), 11 states have internal predecessors, (3674), 0 states have call successors, (0), 0 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 01:38:59,876 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 334.0) internal successors, (3674), 11 states have internal predecessors, (3674), 0 states have call successors, (0), 0 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 01:38:59,876 INFO L175 Difference]: Start difference. First operand has 108 places, 72 transitions, 506 flow. Second operand 10 states and 1424 transitions. [2023-08-24 01:38:59,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 130 transitions, 1045 flow [2023-08-24 01:38:59,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 130 transitions, 1014 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-24 01:38:59,882 INFO L231 Difference]: Finished difference. Result has 109 places, 69 transitions, 479 flow [2023-08-24 01:38:59,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=479, PETRI_PLACES=109, PETRI_TRANSITIONS=69} [2023-08-24 01:38:59,882 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2023-08-24 01:38:59,882 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 69 transitions, 479 flow [2023-08-24 01:38:59,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 01:38:59,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:38:59,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:38:59,889 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 01:39:00,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:39:00,087 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:39:00,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:39:00,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1862592221, now seen corresponding path program 23 times [2023-08-24 01:39:00,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:39:00,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729325934] [2023-08-24 01:39:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:39:00,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:39:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:39:01,165 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 01:39:01,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:39:01,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729325934] [2023-08-24 01:39:01,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729325934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:39:01,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566607086] [2023-08-24 01:39:01,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 01:39:01,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:39:01,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:39:01,167 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 01:39:01,167 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 01:39:01,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 01:39:01,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:39:01,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 01:39:01,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:39:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:39:01,445 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:39:01,503 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:39:01,504 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:39:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:39:01,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 01:39:01,575 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_932 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_932) c_~f~0.base))) (= (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* c_~j~0 4))) 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* c_~i~0 4)))))) is different from false [2023-08-24 01:39:01,617 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:39:01,619 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-24 01:39:01,635 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:39:01,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 52 [2023-08-24 01:39:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:39:01,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566607086] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 01:39:01,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 01:39:01,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 26 [2023-08-24 01:39:01,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224299697] [2023-08-24 01:39:01,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:39:01,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 01:39:01,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:39:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 01:39:01,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=628, Unknown=1, NotChecked=50, Total=756 [2023-08-24 01:39:01,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 334 [2023-08-24 01:39:01,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 69 transitions, 479 flow. Second operand has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:39:01,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:39:01,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 334 [2023-08-24 01:39:01,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:39:04,162 INFO L124 PetriNetUnfolderBase]: 538/1156 cut-off events. [2023-08-24 01:39:04,162 INFO L125 PetriNetUnfolderBase]: For 2548/2555 co-relation queries the response was YES. [2023-08-24 01:39:04,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4551 conditions, 1156 events. 538/1156 cut-off events. For 2548/2555 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6820 event pairs, 334 based on Foata normal form. 3/1104 useless extension candidates. Maximal degree in co-relation 4507. Up to 568 conditions per place. [2023-08-24 01:39:04,166 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 58 selfloop transitions, 9 changer transitions 27/112 dead transitions. [2023-08-24 01:39:04,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 112 transitions, 908 flow [2023-08-24 01:39:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 01:39:04,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 01:39:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1085 transitions. [2023-08-24 01:39:04,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.406062874251497 [2023-08-24 01:39:04,169 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1085 transitions. [2023-08-24 01:39:04,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1085 transitions. [2023-08-24 01:39:04,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:39:04,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1085 transitions. [2023-08-24 01:39:04,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 135.625) internal successors, (1085), 8 states have internal predecessors, (1085), 0 states have call successors, (0), 0 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 01:39:04,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:39:04,171 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:39:04,171 INFO L175 Difference]: Start difference. First operand has 109 places, 69 transitions, 479 flow. Second operand 8 states and 1085 transitions. [2023-08-24 01:39:04,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 112 transitions, 908 flow [2023-08-24 01:39:04,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 112 transitions, 874 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-08-24 01:39:04,177 INFO L231 Difference]: Finished difference. Result has 107 places, 69 transitions, 490 flow [2023-08-24 01:39:04,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=490, PETRI_PLACES=107, PETRI_TRANSITIONS=69} [2023-08-24 01:39:04,177 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2023-08-24 01:39:04,177 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 69 transitions, 490 flow [2023-08-24 01:39:04,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:39:04,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:39:04,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:39:04,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 01:39:04,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:39:04,378 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:39:04,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:39:04,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1502195115, now seen corresponding path program 24 times [2023-08-24 01:39:04,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:39:04,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490795687] [2023-08-24 01:39:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:39:04,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:39:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:39:04,934 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 01:39:04,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:39:04,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490795687] [2023-08-24 01:39:04,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490795687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:39:04,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414487947] [2023-08-24 01:39:04,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 01:39:04,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:39:04,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:39:04,935 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 01:39:04,937 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 01:39:05,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 01:39:05,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:39:05,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 01:39:05,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:39:05,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:39:05,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:39:05,331 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:39:05,332 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:39:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:39:05,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:39:05,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414487947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:39:05,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:39:05,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2023-08-24 01:39:05,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282504119] [2023-08-24 01:39:05,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:39:05,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 01:39:05,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:39:05,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 01:39:05,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-08-24 01:39:05,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 334 [2023-08-24 01:39:05,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 69 transitions, 490 flow. Second operand has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:39:05,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:39:05,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 334 [2023-08-24 01:39:05,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:39:05,655 INFO L124 PetriNetUnfolderBase]: 490/1054 cut-off events. [2023-08-24 01:39:05,655 INFO L125 PetriNetUnfolderBase]: For 2275/2282 co-relation queries the response was YES. [2023-08-24 01:39:05,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4180 conditions, 1054 events. 490/1054 cut-off events. For 2275/2282 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6129 event pairs, 334 based on Foata normal form. 3/1002 useless extension candidates. Maximal degree in co-relation 4129. Up to 501 conditions per place. [2023-08-24 01:39:05,659 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 54 selfloop transitions, 8 changer transitions 22/102 dead transitions. [2023-08-24 01:39:05,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 102 transitions, 838 flow [2023-08-24 01:39:05,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 01:39:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 01:39:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1202 transitions. [2023-08-24 01:39:05,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39986693280106456 [2023-08-24 01:39:05,661 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1202 transitions. [2023-08-24 01:39:05,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1202 transitions. [2023-08-24 01:39:05,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:39:05,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1202 transitions. [2023-08-24 01:39:05,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 133.55555555555554) internal successors, (1202), 9 states have internal predecessors, (1202), 0 states have call successors, (0), 0 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 01:39:05,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:39:05,663 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:39:05,663 INFO L175 Difference]: Start difference. First operand has 107 places, 69 transitions, 490 flow. Second operand 9 states and 1202 transitions. [2023-08-24 01:39:05,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 102 transitions, 838 flow [2023-08-24 01:39:05,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 102 transitions, 808 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-24 01:39:05,668 INFO L231 Difference]: Finished difference. Result has 108 places, 68 transitions, 474 flow [2023-08-24 01:39:05,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=474, PETRI_PLACES=108, PETRI_TRANSITIONS=68} [2023-08-24 01:39:05,669 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2023-08-24 01:39:05,669 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 68 transitions, 474 flow [2023-08-24 01:39:05,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:39:05,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:39:05,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:39:05,676 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 01:39:05,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 01:39:05,870 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:39:05,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:39:05,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1422957063, now seen corresponding path program 25 times [2023-08-24 01:39:05,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:39:05,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698758361] [2023-08-24 01:39:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:39:05,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:39:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:39:06,418 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 01:39:06,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:39:06,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698758361] [2023-08-24 01:39:06,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698758361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:39:06,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552090220] [2023-08-24 01:39:06,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 01:39:06,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:39:06,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:39:06,420 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 01:39:06,420 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 01:39:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:39:06,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 01:39:06,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:39:06,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:39:06,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:39:06,698 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:39:06,698 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:39:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:39:06,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 01:39:06,835 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:39:06,835 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-24 01:39:06,852 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:39:06,852 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 52 [2023-08-24 01:39:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:39:07,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552090220] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 01:39:07,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 01:39:07,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 9] total 26 [2023-08-24 01:39:07,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357236791] [2023-08-24 01:39:07,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:39:07,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 01:39:07,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:39:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 01:39:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=676, Unknown=2, NotChecked=0, Total=756 [2023-08-24 01:39:07,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 334 [2023-08-24 01:39:07,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 68 transitions, 474 flow. Second operand has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:39:07,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:39:07,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 334 [2023-08-24 01:39:07,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:39:11,421 INFO L124 PetriNetUnfolderBase]: 482/1018 cut-off events. [2023-08-24 01:39:11,421 INFO L125 PetriNetUnfolderBase]: For 2035/2042 co-relation queries the response was YES. [2023-08-24 01:39:11,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3974 conditions, 1018 events. 482/1018 cut-off events. For 2035/2042 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5902 event pairs, 326 based on Foata normal form. 3/966 useless extension candidates. Maximal degree in co-relation 3936. Up to 528 conditions per place. [2023-08-24 01:39:11,425 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 32 selfloop transitions, 3 changer transitions 52/98 dead transitions. [2023-08-24 01:39:11,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 98 transitions, 780 flow [2023-08-24 01:39:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 01:39:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 01:39:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1201 transitions. [2023-08-24 01:39:11,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995342648037259 [2023-08-24 01:39:11,426 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1201 transitions. [2023-08-24 01:39:11,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1201 transitions. [2023-08-24 01:39:11,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:39:11,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1201 transitions. [2023-08-24 01:39:11,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 133.44444444444446) internal successors, (1201), 9 states have internal predecessors, (1201), 0 states have call successors, (0), 0 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 01:39:11,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:39:11,429 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 01:39:11,429 INFO L175 Difference]: Start difference. First operand has 108 places, 68 transitions, 474 flow. Second operand 9 states and 1201 transitions. [2023-08-24 01:39:11,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 98 transitions, 780 flow [2023-08-24 01:39:11,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 98 transitions, 747 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-08-24 01:39:11,433 INFO L231 Difference]: Finished difference. Result has 106 places, 46 transitions, 283 flow [2023-08-24 01:39:11,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=106, PETRI_TRANSITIONS=46} [2023-08-24 01:39:11,434 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2023-08-24 01:39:11,434 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 46 transitions, 283 flow [2023-08-24 01:39:11,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 01:39:11,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:39:11,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:39:11,439 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 01:39:11,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 01:39:11,635 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:39:11,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:39:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1335346543, now seen corresponding path program 26 times [2023-08-24 01:39:11,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:39:11,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349136161] [2023-08-24 01:39:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:39:11,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:39:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:39:12,187 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 01:39:12,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:39:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349136161] [2023-08-24 01:39:12,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349136161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:39:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828349716] [2023-08-24 01:39:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 01:39:12,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:39:12,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:39:12,189 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 01:39:12,189 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 01:39:12,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 01:39:12,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:39:12,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 01:39:12,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:39:12,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:39:12,424 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:39:12,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:39:12,459 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:39:12,541 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:39:12,541 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:39:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:39:12,547 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:39:12,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828349716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:39:12,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:39:12,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-08-24 01:39:12,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677772048] [2023-08-24 01:39:12,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:39:12,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 01:39:12,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:39:12,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 01:39:12,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2023-08-24 01:39:12,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 334 [2023-08-24 01:39:12,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 46 transitions, 283 flow. Second operand has 11 states, 11 states have (on average 125.54545454545455) internal successors, (1381), 11 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 01:39:12,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:39:12,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 334 [2023-08-24 01:39:12,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:39:12,924 INFO L124 PetriNetUnfolderBase]: 225/478 cut-off events. [2023-08-24 01:39:12,924 INFO L125 PetriNetUnfolderBase]: For 1062/1075 co-relation queries the response was YES. [2023-08-24 01:39:12,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1821 conditions, 478 events. 225/478 cut-off events. For 1062/1075 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2110 event pairs, 59 based on Foata normal form. 2/462 useless extension candidates. Maximal degree in co-relation 1786. Up to 145 conditions per place. [2023-08-24 01:39:12,926 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 47 selfloop transitions, 8 changer transitions 18/84 dead transitions. [2023-08-24 01:39:12,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 84 transitions, 615 flow [2023-08-24 01:39:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 01:39:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 01:39:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1293 transitions. [2023-08-24 01:39:12,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.387125748502994 [2023-08-24 01:39:12,927 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1293 transitions. [2023-08-24 01:39:12,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1293 transitions. [2023-08-24 01:39:12,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:39:12,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1293 transitions. [2023-08-24 01:39:12,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 129.3) internal successors, (1293), 10 states have internal predecessors, (1293), 0 states have call successors, (0), 0 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 01:39:12,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 334.0) internal successors, (3674), 11 states have internal predecessors, (3674), 0 states have call successors, (0), 0 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 01:39:12,930 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 334.0) internal successors, (3674), 11 states have internal predecessors, (3674), 0 states have call successors, (0), 0 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 01:39:12,930 INFO L175 Difference]: Start difference. First operand has 106 places, 46 transitions, 283 flow. Second operand 10 states and 1293 transitions. [2023-08-24 01:39:12,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 84 transitions, 615 flow [2023-08-24 01:39:12,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 501 flow, removed 18 selfloop flow, removed 29 redundant places. [2023-08-24 01:39:12,933 INFO L231 Difference]: Finished difference. Result has 71 places, 48 transitions, 231 flow [2023-08-24 01:39:12,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=231, PETRI_PLACES=71, PETRI_TRANSITIONS=48} [2023-08-24 01:39:12,934 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2023-08-24 01:39:12,934 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 48 transitions, 231 flow [2023-08-24 01:39:12,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.54545454545455) internal successors, (1381), 11 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 01:39:12,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:39:12,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:39:12,938 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 01:39:13,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 01:39:13,139 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:39:13,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:39:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash 963798437, now seen corresponding path program 27 times [2023-08-24 01:39:13,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:39:13,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73830119] [2023-08-24 01:39:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:39:13,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:39:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:39:13,784 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 01:39:13,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:39:13,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73830119] [2023-08-24 01:39:13,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73830119] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:39:13,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790520138] [2023-08-24 01:39:13,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 01:39:13,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:39:13,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:39:13,785 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 01:39:13,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 01:39:13,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 01:39:13,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:39:13,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 01:39:13,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:39:14,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:39:14,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:39:14,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:39:14,091 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:39:14,166 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:39:14,166 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:39:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:39:14,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:39:14,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790520138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:39:14,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:39:14,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-08-24 01:39:14,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146038839] [2023-08-24 01:39:14,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:39:14,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 01:39:14,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:39:14,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 01:39:14,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2023-08-24 01:39:14,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 334 [2023-08-24 01:39:14,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 48 transitions, 231 flow. Second operand has 11 states, 11 states have (on average 125.54545454545455) internal successors, (1381), 11 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 01:39:14,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:39:14,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 334 [2023-08-24 01:39:14,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:39:14,489 INFO L124 PetriNetUnfolderBase]: 211/456 cut-off events. [2023-08-24 01:39:14,489 INFO L125 PetriNetUnfolderBase]: For 752/765 co-relation queries the response was YES. [2023-08-24 01:39:14,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 456 events. 211/456 cut-off events. For 752/765 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1913 event pairs, 55 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 1666. Up to 143 conditions per place. [2023-08-24 01:39:14,491 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 51 selfloop transitions, 8 changer transitions 15/85 dead transitions. [2023-08-24 01:39:14,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 85 transitions, 534 flow [2023-08-24 01:39:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 01:39:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 01:39:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1294 transitions. [2023-08-24 01:39:14,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874251497005988 [2023-08-24 01:39:14,492 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1294 transitions. [2023-08-24 01:39:14,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1294 transitions. [2023-08-24 01:39:14,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:39:14,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1294 transitions. [2023-08-24 01:39:14,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 129.4) internal successors, (1294), 10 states have internal predecessors, (1294), 0 states have call successors, (0), 0 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 01:39:14,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 334.0) internal successors, (3674), 11 states have internal predecessors, (3674), 0 states have call successors, (0), 0 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 01:39:14,495 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 334.0) internal successors, (3674), 11 states have internal predecessors, (3674), 0 states have call successors, (0), 0 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 01:39:14,495 INFO L175 Difference]: Start difference. First operand has 71 places, 48 transitions, 231 flow. Second operand 10 states and 1294 transitions. [2023-08-24 01:39:14,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 85 transitions, 534 flow [2023-08-24 01:39:14,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 85 transitions, 511 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-24 01:39:14,497 INFO L231 Difference]: Finished difference. Result has 73 places, 47 transitions, 224 flow [2023-08-24 01:39:14,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=224, PETRI_PLACES=73, PETRI_TRANSITIONS=47} [2023-08-24 01:39:14,498 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2023-08-24 01:39:14,498 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 47 transitions, 224 flow [2023-08-24 01:39:14,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.54545454545455) internal successors, (1381), 11 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 01:39:14,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:39:14,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:39:14,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 01:39:14,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:39:14,701 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 01:39:14,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:39:14,702 INFO L85 PathProgramCache]: Analyzing trace with hash -792756415, now seen corresponding path program 28 times [2023-08-24 01:39:14,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:39:14,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241456429] [2023-08-24 01:39:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:39:14,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:39:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:39:15,262 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 01:39:15,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:39:15,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241456429] [2023-08-24 01:39:15,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241456429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:39:15,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069890448] [2023-08-24 01:39:15,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 01:39:15,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:39:15,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:39:15,264 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 01:39:15,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 01:39:15,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 01:39:15,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:39:15,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 01:39:15,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:39:15,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:39:15,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:39:15,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:39:15,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 01:39:15,635 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:39:15,636 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-24 01:39:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:39:15,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:39:15,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069890448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:39:15,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:39:15,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-08-24 01:39:15,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988282762] [2023-08-24 01:39:15,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:39:15,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 01:39:15,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:39:15,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 01:39:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-08-24 01:39:15,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 334 [2023-08-24 01:39:15,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 47 transitions, 224 flow. Second operand has 11 states, 11 states have (on average 125.54545454545455) internal successors, (1381), 11 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 01:39:15,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:39:15,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 334 [2023-08-24 01:39:15,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:39:15,871 INFO L124 PetriNetUnfolderBase]: 187/392 cut-off events. [2023-08-24 01:39:15,871 INFO L125 PetriNetUnfolderBase]: For 682/695 co-relation queries the response was YES. [2023-08-24 01:39:15,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1433 conditions, 392 events. 187/392 cut-off events. For 682/695 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1545 event pairs, 55 based on Foata normal form. 2/376 useless extension candidates. Maximal degree in co-relation 1419. Up to 127 conditions per place. [2023-08-24 01:39:15,872 INFO L140 encePairwiseOnDemand]: 326/334 looper letters, 0 selfloop transitions, 0 changer transitions 73/73 dead transitions. [2023-08-24 01:39:15,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 454 flow [2023-08-24 01:39:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 01:39:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 01:39:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1037 transitions. [2023-08-24 01:39:15,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880988023952096 [2023-08-24 01:39:15,873 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1037 transitions. [2023-08-24 01:39:15,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1037 transitions. [2023-08-24 01:39:15,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:39:15,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1037 transitions. [2023-08-24 01:39:15,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 129.625) internal successors, (1037), 8 states have internal predecessors, (1037), 0 states have call successors, (0), 0 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 01:39:15,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:39:15,876 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 334.0) internal successors, (3006), 9 states have internal predecessors, (3006), 0 states have call successors, (0), 0 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 01:39:15,876 INFO L175 Difference]: Start difference. First operand has 73 places, 47 transitions, 224 flow. Second operand 8 states and 1037 transitions. [2023-08-24 01:39:15,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 454 flow [2023-08-24 01:39:15,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 436 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-24 01:39:15,877 INFO L231 Difference]: Finished difference. Result has 70 places, 0 transitions, 0 flow [2023-08-24 01:39:15,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=70, PETRI_TRANSITIONS=0} [2023-08-24 01:39:15,878 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2023-08-24 01:39:15,878 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 0 transitions, 0 flow [2023-08-24 01:39:15,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.54545454545455) internal successors, (1381), 11 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 01:39:15,880 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 01:39:15,881 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 01:39:15,881 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 01:39:15,881 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 01:39:15,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-24 01:39:16,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 01:39:16,086 INFO L445 BasicCegarLoop]: Path program histogram: [28, 1] [2023-08-24 01:39:16,088 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 01:39:16,088 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 01:39:16,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 01:39:16 BasicIcfg [2023-08-24 01:39:16,090 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 01:39:16,090 INFO L158 Benchmark]: Toolchain (without parser) took 57662.03ms. Allocated memory was 406.8MB in the beginning and 1.1GB in the end (delta: 723.5MB). Free memory was 383.8MB in the beginning and 1.0GB in the end (delta: -617.3MB). Peak memory consumption was 757.8MB. Max. memory is 16.0GB. [2023-08-24 01:39:16,090 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 406.8MB. Free memory was 384.4MB in the beginning and 384.2MB in the end (delta: 153.2kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 01:39:16,090 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.09ms. Allocated memory is still 406.8MB. Free memory was 383.8MB in the beginning and 371.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 01:39:16,090 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.21ms. Allocated memory is still 406.8MB. Free memory was 371.5MB in the beginning and 369.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 01:39:16,090 INFO L158 Benchmark]: Boogie Preprocessor took 31.90ms. Allocated memory is still 406.8MB. Free memory was 369.4MB in the beginning and 367.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 01:39:16,090 INFO L158 Benchmark]: RCFGBuilder took 467.47ms. Allocated memory is still 406.8MB. Free memory was 367.7MB in the beginning and 341.0MB in the end (delta: 26.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-24 01:39:16,091 INFO L158 Benchmark]: TraceAbstraction took 56886.69ms. Allocated memory was 406.8MB in the beginning and 1.1GB in the end (delta: 723.5MB). Free memory was 340.4MB in the beginning and 1.0GB in the end (delta: -660.8MB). Peak memory consumption was 713.7MB. Max. memory is 16.0GB. [2023-08-24 01:39:16,091 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 406.8MB. Free memory was 384.4MB in the beginning and 384.2MB in the end (delta: 153.2kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 225.09ms. Allocated memory is still 406.8MB. Free memory was 383.8MB in the beginning and 371.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.21ms. Allocated memory is still 406.8MB. Free memory was 371.5MB in the beginning and 369.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.90ms. Allocated memory is still 406.8MB. Free memory was 369.4MB in the beginning and 367.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 467.47ms. Allocated memory is still 406.8MB. Free memory was 367.7MB in the beginning and 341.0MB in the end (delta: 26.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 56886.69ms. Allocated memory was 406.8MB in the beginning and 1.1GB in the end (delta: 723.5MB). Free memory was 340.4MB in the beginning and 1.0GB in the end (delta: -660.8MB). Peak memory consumption was 713.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.2s, 171 PlacesBefore, 45 PlacesAfterwards, 168 TransitionsBefore, 36 TransitionsAfterwards, 1266 CoEnabledTransitionPairs, 8 FixpointIterations, 104 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 23 TrivialYvCompositions, 0 ConcurrentYvCompositions, 6 ChoiceCompositions, 153 TotalNumberOfCompositions, 7956 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3649, independent: 3293, independent conditional: 0, independent unconditional: 3293, dependent: 356, dependent conditional: 0, dependent unconditional: 356, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 646, independent: 624, independent conditional: 0, independent unconditional: 624, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3649, independent: 2669, independent conditional: 0, independent unconditional: 2669, dependent: 334, dependent conditional: 0, dependent unconditional: 334, unknown: 646, unknown conditional: 0, unknown unconditional: 646] , Statistics on independence cache: Total cache size (in pairs): 191, Positive cache size: 174, Positive conditional cache size: 0, Positive unconditional cache size: 174, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 161]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 210 locations, 4 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: 56.8s, OverallIterations: 29, TraceHistogramMax: 2, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 23.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2490 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2490 mSDsluCounter, 45 SdHoareTripleChecker+Invalid, 3.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 584 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 69 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9258 IncrementalHoareTripleChecker+Invalid, 9911 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 69 mSolverCounterUnsat, 21 mSDtfsCounter, 9258 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1383 GetRequests, 843 SyntacticMatches, 2 SemanticMatches, 538 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 14.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1059occurred in iteration=13, InterpolantAutomatonStates: 246, 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, 1.5s SatisfiabilityAnalysisTime, 20.6s InterpolantComputationTime, 1804 NumberOfCodeBlocks, 1769 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 2006 ConstructedInterpolants, 84 QuantifiedInterpolants, 29380 SizeOfPredicates, 242 NumberOfNonLiveVariables, 5465 ConjunctsInSsa, 463 ConjunctsInUnsatCore, 56 InterpolantComputations, 28 PerfectInterpolantSequences, 79/149 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 01:39:16,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...