/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 09:42:02,265 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 09:42:02,333 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 09:42:02,338 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 09:42:02,339 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 09:42:02,363 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 09:42:02,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 09:42:02,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 09:42:02,364 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 09:42:02,368 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 09:42:02,368 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 09:42:02,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 09:42:02,369 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 09:42:02,370 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 09:42:02,370 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 09:42:02,370 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 09:42:02,370 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 09:42:02,371 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 09:42:02,371 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 09:42:02,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 09:42:02,371 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 09:42:02,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 09:42:02,372 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 09:42:02,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 09:42:02,373 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 09:42:02,373 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 09:42:02,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 09:42:02,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:42:02,374 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 09:42:02,375 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 09:42:02,375 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 09:42:02,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 09:42:02,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 09:42:02,376 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 09:42:02,376 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 09:42:02,376 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 09:42:02,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 09:42:02,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 09:42:02,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 09:42:02,710 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 09:42:02,712 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 09:42:02,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2023-08-24 09:42:03,978 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 09:42:04,190 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 09:42:04,191 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2023-08-24 09:42:04,200 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f122f261f/da604f71651a46b49080cec36731c392/FLAGd658d40f7 [2023-08-24 09:42:04,217 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f122f261f/da604f71651a46b49080cec36731c392 [2023-08-24 09:42:04,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 09:42:04,221 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 09:42:04,222 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 09:42:04,222 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 09:42:04,224 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 09:42:04,226 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31efb1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04, skipping insertion in model container [2023-08-24 09:42:04,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,250 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 09:42:04,394 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2023-08-24 09:42:04,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:42:04,416 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 09:42:04,448 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2023-08-24 09:42:04,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:42:04,469 INFO L206 MainTranslator]: Completed translation [2023-08-24 09:42:04,469 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04 WrapperNode [2023-08-24 09:42:04,469 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 09:42:04,470 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 09:42:04,470 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 09:42:04,470 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 09:42:04,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,494 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,524 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2023-08-24 09:42:04,525 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 09:42:04,526 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 09:42:04,526 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 09:42:04,526 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 09:42:04,534 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,548 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,548 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,553 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,556 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,557 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,558 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,560 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 09:42:04,572 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 09:42:04,572 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 09:42:04,572 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 09:42:04,573 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (1/1) ... [2023-08-24 09:42:04,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:42:04,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:04,606 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 09:42:04,629 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 09:42:04,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 09:42:04,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 09:42:04,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 09:42:04,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 09:42:04,644 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 09:42:04,644 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 09:42:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 09:42:04,645 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 09:42:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 09:42:04,645 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 09:42:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 09:42:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 09:42:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 09:42:04,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 09:42:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 09:42:04,647 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 09:42:04,759 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 09:42:04,763 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 09:42:05,012 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 09:42:05,019 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 09:42:05,019 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 09:42:05,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:42:05 BoogieIcfgContainer [2023-08-24 09:42:05,021 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 09:42:05,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 09:42:05,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 09:42:05,030 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 09:42:05,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 09:42:04" (1/3) ... [2023-08-24 09:42:05,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1cd60b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:42:05, skipping insertion in model container [2023-08-24 09:42:05,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:42:04" (2/3) ... [2023-08-24 09:42:05,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1cd60b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:42:05, skipping insertion in model container [2023-08-24 09:42:05,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:42:05" (3/3) ... [2023-08-24 09:42:05,032 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2023-08-24 09:42:05,044 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 09:42:05,045 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 09:42:05,045 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 09:42:05,114 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 09:42:05,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 155 transitions, 334 flow [2023-08-24 09:42:05,218 INFO L124 PetriNetUnfolderBase]: 12/152 cut-off events. [2023-08-24 09:42:05,218 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:42:05,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 152 events. 12/152 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 114 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2023-08-24 09:42:05,224 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 155 transitions, 334 flow [2023-08-24 09:42:05,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 142 transitions, 302 flow [2023-08-24 09:42:05,232 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 09:42:05,258 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 142 transitions, 302 flow [2023-08-24 09:42:05,260 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 142 transitions, 302 flow [2023-08-24 09:42:05,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 302 flow [2023-08-24 09:42:05,303 INFO L124 PetriNetUnfolderBase]: 12/142 cut-off events. [2023-08-24 09:42:05,303 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:42:05,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 12/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 113 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2023-08-24 09:42:05,306 INFO L119 LiptonReduction]: Number of co-enabled transitions 1950 [2023-08-24 09:42:09,513 INFO L134 LiptonReduction]: Checked pairs total: 2032 [2023-08-24 09:42:09,513 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-24 09:42:09,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 09:42:09,531 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;@119a11ba, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 09:42:09,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 09:42:09,539 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 09:42:09,539 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-08-24 09:42:09,539 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:42:09,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:09,540 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] [2023-08-24 09:42:09,540 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 09:42:09,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash -843473003, now seen corresponding path program 1 times [2023-08-24 09:42:09,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:09,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986777903] [2023-08-24 09:42:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:09,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:10,182 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 09:42:10,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:10,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986777903] [2023-08-24 09:42:10,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986777903] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:42:10,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:42:10,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 09:42:10,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285380896] [2023-08-24 09:42:10,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:42:10,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:42:10,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:10,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:42:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:42:10,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 294 [2023-08-24 09:42:10,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 09:42:10,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:10,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 294 [2023-08-24 09:42:10,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:10,349 INFO L124 PetriNetUnfolderBase]: 360/508 cut-off events. [2023-08-24 09:42:10,349 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-24 09:42:10,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1608 event pairs, 39 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-08-24 09:42:10,358 INFO L140 encePairwiseOnDemand]: 289/294 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2023-08-24 09:42:10,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2023-08-24 09:42:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:42:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:42:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2023-08-24 09:42:10,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954648526077097 [2023-08-24 09:42:10,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2023-08-24 09:42:10,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2023-08-24 09:42:10,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:10,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2023-08-24 09:42:10,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 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 09:42:10,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 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 09:42:10,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 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 09:42:10,391 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 437 transitions. [2023-08-24 09:42:10,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2023-08-24 09:42:10,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 09:42:10,396 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-08-24 09:42:10,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-24 09:42:10,401 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-24 09:42:10,401 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-08-24 09:42:10,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 09:42:10,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:10,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:10,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 09:42:10,402 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 09:42:10,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:10,402 INFO L85 PathProgramCache]: Analyzing trace with hash 137741107, now seen corresponding path program 1 times [2023-08-24 09:42:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:10,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937616277] [2023-08-24 09:42:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:10,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:42:10,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:10,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937616277] [2023-08-24 09:42:10,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937616277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:42:10,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:42:10,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 09:42:10,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132313284] [2023-08-24 09:42:10,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:42:10,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:42:10,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:10,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:42:10,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 09:42:10,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 294 [2023-08-24 09:42:10,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 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 09:42:10,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:10,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 294 [2023-08-24 09:42:10,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:10,719 INFO L124 PetriNetUnfolderBase]: 615/925 cut-off events. [2023-08-24 09:42:10,720 INFO L125 PetriNetUnfolderBase]: For 258/261 co-relation queries the response was YES. [2023-08-24 09:42:10,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 925 events. 615/925 cut-off events. For 258/261 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3911 event pairs, 281 based on Foata normal form. 34/954 useless extension candidates. Maximal degree in co-relation 490. Up to 484 conditions per place. [2023-08-24 09:42:10,725 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 53 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-08-24 09:42:10,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 292 flow [2023-08-24 09:42:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 09:42:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 09:42:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2023-08-24 09:42:10,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42653061224489797 [2023-08-24 09:42:10,729 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2023-08-24 09:42:10,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2023-08-24 09:42:10,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:10,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2023-08-24 09:42:10,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 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 09:42:10,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 09:42:10,735 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 09:42:10,735 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 627 transitions. [2023-08-24 09:42:10,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 292 flow [2023-08-24 09:42:10,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 09:42:10,738 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 114 flow [2023-08-24 09:42:10,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-24 09:42:10,739 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-24 09:42:10,739 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 114 flow [2023-08-24 09:42:10,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 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 09:42:10,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:10,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:10,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 09:42:10,740 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 09:42:10,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash -865766179, now seen corresponding path program 1 times [2023-08-24 09:42:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:10,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996496617] [2023-08-24 09:42:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:10,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:42:10,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:10,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996496617] [2023-08-24 09:42:10,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996496617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:42:10,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:42:10,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 09:42:10,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256897369] [2023-08-24 09:42:10,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:42:10,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:42:10,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:10,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:42:10,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 09:42:10,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 294 [2023-08-24 09:42:10,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 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 09:42:10,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:10,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 294 [2023-08-24 09:42:10,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:11,024 INFO L124 PetriNetUnfolderBase]: 567/867 cut-off events. [2023-08-24 09:42:11,024 INFO L125 PetriNetUnfolderBase]: For 554/626 co-relation queries the response was YES. [2023-08-24 09:42:11,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 867 events. 567/867 cut-off events. For 554/626 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3485 event pairs, 328 based on Foata normal form. 106/971 useless extension candidates. Maximal degree in co-relation 1470. Up to 568 conditions per place. [2023-08-24 09:42:11,030 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 52 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-08-24 09:42:11,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 59 transitions, 306 flow [2023-08-24 09:42:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 09:42:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 09:42:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 603 transitions. [2023-08-24 09:42:11,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41020408163265304 [2023-08-24 09:42:11,034 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 603 transitions. [2023-08-24 09:42:11,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 603 transitions. [2023-08-24 09:42:11,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:11,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 603 transitions. [2023-08-24 09:42:11,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.6) internal successors, (603), 5 states have internal predecessors, (603), 0 states have call successors, (0), 0 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 09:42:11,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 09:42:11,040 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 09:42:11,040 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 114 flow. Second operand 5 states and 603 transitions. [2023-08-24 09:42:11,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 59 transitions, 306 flow [2023-08-24 09:42:11,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 59 transitions, 302 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 09:42:11,044 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 137 flow [2023-08-24 09:42:11,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-08-24 09:42:11,045 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-08-24 09:42:11,048 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 137 flow [2023-08-24 09:42:11,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 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 09:42:11,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:11,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:11,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 09:42:11,049 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 09:42:11,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:11,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1410865083, now seen corresponding path program 1 times [2023-08-24 09:42:11,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:11,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229794603] [2023-08-24 09:42:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:11,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:42:11,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:11,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229794603] [2023-08-24 09:42:11,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229794603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:42:11,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:42:11,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 09:42:11,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598525638] [2023-08-24 09:42:11,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:42:11,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:42:11,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:11,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:42:11,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 09:42:11,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 294 [2023-08-24 09:42:11,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 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 09:42:11,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:11,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 294 [2023-08-24 09:42:11,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:11,361 INFO L124 PetriNetUnfolderBase]: 417/635 cut-off events. [2023-08-24 09:42:11,362 INFO L125 PetriNetUnfolderBase]: For 740/812 co-relation queries the response was YES. [2023-08-24 09:42:11,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1853 conditions, 635 events. 417/635 cut-off events. For 740/812 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2482 event pairs, 221 based on Foata normal form. 86/719 useless extension candidates. Maximal degree in co-relation 1511. Up to 514 conditions per place. [2023-08-24 09:42:11,366 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 24 selfloop transitions, 2 changer transitions 25/53 dead transitions. [2023-08-24 09:42:11,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 291 flow [2023-08-24 09:42:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 09:42:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 09:42:11,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 602 transitions. [2023-08-24 09:42:11,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2023-08-24 09:42:11,368 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 602 transitions. [2023-08-24 09:42:11,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 602 transitions. [2023-08-24 09:42:11,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:11,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 602 transitions. [2023-08-24 09:42:11,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 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 09:42:11,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 09:42:11,374 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 09:42:11,374 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 137 flow. Second operand 5 states and 602 transitions. [2023-08-24 09:42:11,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 291 flow [2023-08-24 09:42:11,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 09:42:11,377 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 110 flow [2023-08-24 09:42:11,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-24 09:42:11,378 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2023-08-24 09:42:11,378 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 110 flow [2023-08-24 09:42:11,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 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 09:42:11,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:11,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:11,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 09:42:11,379 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 09:42:11,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:11,379 INFO L85 PathProgramCache]: Analyzing trace with hash -496079228, now seen corresponding path program 1 times [2023-08-24 09:42:11,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:11,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268296152] [2023-08-24 09:42:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:11,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:11,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:11,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268296152] [2023-08-24 09:42:11,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268296152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:11,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960666262] [2023-08-24 09:42:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:11,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:11,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:11,501 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 09:42:11,511 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 09:42:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:11,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:42:11,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:11,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:11,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960666262] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:11,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:42:11,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-08-24 09:42:11,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692489631] [2023-08-24 09:42:11,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:42:11,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:42:11,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:42:11,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:42:11,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:42:11,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 09:42:11,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:11,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:42:11,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:12,030 INFO L124 PetriNetUnfolderBase]: 544/799 cut-off events. [2023-08-24 09:42:12,030 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2023-08-24 09:42:12,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452 conditions, 799 events. 544/799 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3057 event pairs, 139 based on Foata normal form. 16/814 useless extension candidates. Maximal degree in co-relation 2433. Up to 410 conditions per place. [2023-08-24 09:42:12,037 INFO L140 encePairwiseOnDemand]: 286/294 looper letters, 58 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2023-08-24 09:42:12,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 68 transitions, 396 flow [2023-08-24 09:42:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:42:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:42:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 801 transitions. [2023-08-24 09:42:12,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892128279883382 [2023-08-24 09:42:12,041 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 801 transitions. [2023-08-24 09:42:12,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 801 transitions. [2023-08-24 09:42:12,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:12,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 801 transitions. [2023-08-24 09:42:12,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 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 09:42:12,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:42:12,047 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:42:12,048 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 110 flow. Second operand 7 states and 801 transitions. [2023-08-24 09:42:12,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 68 transitions, 396 flow [2023-08-24 09:42:12,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 68 transitions, 334 flow, removed 29 selfloop flow, removed 8 redundant places. [2023-08-24 09:42:12,056 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 141 flow [2023-08-24 09:42:12,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=141, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-08-24 09:42:12,058 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-08-24 09:42:12,058 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 141 flow [2023-08-24 09:42:12,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 09:42:12,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:12,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:12,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 09:42:12,265 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 09:42:12,265 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 09:42:12,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:12,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1751924946, now seen corresponding path program 2 times [2023-08-24 09:42:12,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:12,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455982675] [2023-08-24 09:42:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:12,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:12,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:12,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455982675] [2023-08-24 09:42:12,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455982675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:12,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717090204] [2023-08-24 09:42:12,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:42:12,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:12,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:12,369 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 09:42:12,410 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 09:42:12,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:42:12,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:12,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:42:12,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:12,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:12,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717090204] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:12,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:42:12,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-08-24 09:42:12,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139693932] [2023-08-24 09:42:12,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:42:12,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:42:12,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:12,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:42:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-24 09:42:12,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:42:12,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 141 flow. Second operand has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 09:42:12,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:12,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:42:12,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:12,890 INFO L124 PetriNetUnfolderBase]: 736/1083 cut-off events. [2023-08-24 09:42:12,891 INFO L125 PetriNetUnfolderBase]: For 1058/1058 co-relation queries the response was YES. [2023-08-24 09:42:12,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3300 conditions, 1083 events. 736/1083 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4337 event pairs, 221 based on Foata normal form. 12/1092 useless extension candidates. Maximal degree in co-relation 3278. Up to 648 conditions per place. [2023-08-24 09:42:12,899 INFO L140 encePairwiseOnDemand]: 286/294 looper letters, 60 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2023-08-24 09:42:12,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 73 transitions, 447 flow [2023-08-24 09:42:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:42:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:42:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 797 transitions. [2023-08-24 09:42:12,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872691933916424 [2023-08-24 09:42:12,903 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 797 transitions. [2023-08-24 09:42:12,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 797 transitions. [2023-08-24 09:42:12,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:12,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 797 transitions. [2023-08-24 09:42:12,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.85714285714286) internal successors, (797), 7 states have internal predecessors, (797), 0 states have call successors, (0), 0 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 09:42:12,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:42:12,911 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:42:12,911 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 141 flow. Second operand 7 states and 797 transitions. [2023-08-24 09:42:12,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 73 transitions, 447 flow [2023-08-24 09:42:12,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 412 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-24 09:42:12,915 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 198 flow [2023-08-24 09:42:12,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-24 09:42:12,917 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-08-24 09:42:12,917 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 198 flow [2023-08-24 09:42:12,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 09:42:12,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:12,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:12,925 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 09:42:13,125 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 09:42:13,126 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 09:42:13,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:13,127 INFO L85 PathProgramCache]: Analyzing trace with hash 599876626, now seen corresponding path program 3 times [2023-08-24 09:42:13,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:13,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28190984] [2023-08-24 09:42:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:13,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:13,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:13,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28190984] [2023-08-24 09:42:13,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28190984] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:13,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238526450] [2023-08-24 09:42:13,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:42:13,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:13,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:13,263 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 09:42:13,284 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 09:42:13,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:42:13,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:13,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:42:13,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:13,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:13,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238526450] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:13,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:42:13,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-08-24 09:42:13,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79018459] [2023-08-24 09:42:13,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:42:13,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:42:13,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:13,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:42:13,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:42:13,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:42:13,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 09:42:13,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:13,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:42:13,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:13,731 INFO L124 PetriNetUnfolderBase]: 840/1246 cut-off events. [2023-08-24 09:42:13,731 INFO L125 PetriNetUnfolderBase]: For 2290/2290 co-relation queries the response was YES. [2023-08-24 09:42:13,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4380 conditions, 1246 events. 840/1246 cut-off events. For 2290/2290 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5152 event pairs, 307 based on Foata normal form. 16/1259 useless extension candidates. Maximal degree in co-relation 4355. Up to 903 conditions per place. [2023-08-24 09:42:13,740 INFO L140 encePairwiseOnDemand]: 286/294 looper letters, 58 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2023-08-24 09:42:13,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 527 flow [2023-08-24 09:42:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:42:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:42:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 798 transitions. [2023-08-24 09:42:13,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2023-08-24 09:42:13,743 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 798 transitions. [2023-08-24 09:42:13,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 798 transitions. [2023-08-24 09:42:13,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:13,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 798 transitions. [2023-08-24 09:42:13,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 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 09:42:13,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:42:13,749 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:42:13,749 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 198 flow. Second operand 7 states and 798 transitions. [2023-08-24 09:42:13,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 527 flow [2023-08-24 09:42:13,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 76 transitions, 486 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-24 09:42:13,755 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 295 flow [2023-08-24 09:42:13,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=295, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-08-24 09:42:13,756 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2023-08-24 09:42:13,756 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 295 flow [2023-08-24 09:42:13,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 09:42:13,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:13,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:13,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 09:42:13,962 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 09:42:13,962 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 09:42:13,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1290624674, now seen corresponding path program 4 times [2023-08-24 09:42:13,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:13,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002835745] [2023-08-24 09:42:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:13,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:14,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:14,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002835745] [2023-08-24 09:42:14,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002835745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:14,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127382336] [2023-08-24 09:42:14,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:42:14,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:14,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:14,088 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 09:42:14,115 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 09:42:14,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:42:14,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:14,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 09:42:14,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:14,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:14,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127382336] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:14,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:14,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-08-24 09:42:14,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594489091] [2023-08-24 09:42:14,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:14,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 09:42:14,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:14,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 09:42:14,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-24 09:42:14,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 09:42:14,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 295 flow. Second operand has 13 states, 13 states have (on average 103.76923076923077) internal successors, (1349), 13 states have internal predecessors, (1349), 0 states have call successors, (0), 0 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 09:42:14,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:14,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 09:42:14,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:14,782 INFO L124 PetriNetUnfolderBase]: 869/1312 cut-off events. [2023-08-24 09:42:14,782 INFO L125 PetriNetUnfolderBase]: For 3495/3495 co-relation queries the response was YES. [2023-08-24 09:42:14,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5094 conditions, 1312 events. 869/1312 cut-off events. For 3495/3495 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5306 event pairs, 166 based on Foata normal form. 18/1329 useless extension candidates. Maximal degree in co-relation 5066. Up to 461 conditions per place. [2023-08-24 09:42:14,791 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 105 selfloop transitions, 70 changer transitions 0/175 dead transitions. [2023-08-24 09:42:14,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 175 transitions, 1382 flow [2023-08-24 09:42:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 09:42:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 09:42:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1839 transitions. [2023-08-24 09:42:14,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3679471788715486 [2023-08-24 09:42:14,798 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1839 transitions. [2023-08-24 09:42:14,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1839 transitions. [2023-08-24 09:42:14,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:14,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1839 transitions. [2023-08-24 09:42:14,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 108.17647058823529) internal successors, (1839), 17 states have internal predecessors, (1839), 0 states have call successors, (0), 0 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 09:42:14,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:42:14,812 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:42:14,812 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 295 flow. Second operand 17 states and 1839 transitions. [2023-08-24 09:42:14,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 175 transitions, 1382 flow [2023-08-24 09:42:14,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 175 transitions, 1262 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-24 09:42:14,824 INFO L231 Difference]: Finished difference. Result has 63 places, 100 transitions, 830 flow [2023-08-24 09:42:14,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=830, PETRI_PLACES=63, PETRI_TRANSITIONS=100} [2023-08-24 09:42:14,826 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2023-08-24 09:42:14,826 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 100 transitions, 830 flow [2023-08-24 09:42:14,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 103.76923076923077) internal successors, (1349), 13 states have internal predecessors, (1349), 0 states have call successors, (0), 0 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 09:42:14,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:14,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:14,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 09:42:15,032 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 09:42:15,033 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 09:42:15,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:15,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1330225794, now seen corresponding path program 5 times [2023-08-24 09:42:15,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:15,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782080190] [2023-08-24 09:42:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:15,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:15,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:15,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782080190] [2023-08-24 09:42:15,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782080190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:15,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418772923] [2023-08-24 09:42:15,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:42:15,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:15,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:15,177 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 09:42:15,204 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 09:42:15,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:42:15,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:15,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 09:42:15,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:15,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:15,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418772923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:15,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:15,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 09:42:15,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311610814] [2023-08-24 09:42:15,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:15,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 09:42:15,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 09:42:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-08-24 09:42:15,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 09:42:15,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 100 transitions, 830 flow. Second operand has 15 states, 15 states have (on average 104.0) internal successors, (1560), 15 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:42:15,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:15,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 09:42:15,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:15,868 INFO L124 PetriNetUnfolderBase]: 850/1272 cut-off events. [2023-08-24 09:42:15,869 INFO L125 PetriNetUnfolderBase]: For 3699/3699 co-relation queries the response was YES. [2023-08-24 09:42:15,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5453 conditions, 1272 events. 850/1272 cut-off events. For 3699/3699 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4982 event pairs, 208 based on Foata normal form. 14/1285 useless extension candidates. Maximal degree in co-relation 5423. Up to 624 conditions per place. [2023-08-24 09:42:15,878 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 87 selfloop transitions, 74 changer transitions 0/161 dead transitions. [2023-08-24 09:42:15,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 161 transitions, 1403 flow [2023-08-24 09:42:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:42:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:42:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1407 transitions. [2023-08-24 09:42:15,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36813186813186816 [2023-08-24 09:42:15,883 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1407 transitions. [2023-08-24 09:42:15,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1407 transitions. [2023-08-24 09:42:15,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:15,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1407 transitions. [2023-08-24 09:42:15,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 108.23076923076923) internal successors, (1407), 13 states have internal predecessors, (1407), 0 states have call successors, (0), 0 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 09:42:15,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:42:15,892 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:42:15,892 INFO L175 Difference]: Start difference. First operand has 63 places, 100 transitions, 830 flow. Second operand 13 states and 1407 transitions. [2023-08-24 09:42:15,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 161 transitions, 1403 flow [2023-08-24 09:42:15,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 161 transitions, 1268 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-08-24 09:42:15,907 INFO L231 Difference]: Finished difference. Result has 73 places, 118 transitions, 981 flow [2023-08-24 09:42:15,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=981, PETRI_PLACES=73, PETRI_TRANSITIONS=118} [2023-08-24 09:42:15,908 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-08-24 09:42:15,908 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 118 transitions, 981 flow [2023-08-24 09:42:15,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 104.0) internal successors, (1560), 15 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:42:15,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:15,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:15,919 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 09:42:16,119 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 09:42:16,120 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 09:42:16,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:16,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1057462672, now seen corresponding path program 6 times [2023-08-24 09:42:16,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:16,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813866732] [2023-08-24 09:42:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:16,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:16,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:16,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813866732] [2023-08-24 09:42:16,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813866732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:16,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437641688] [2023-08-24 09:42:16,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:42:16,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:16,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:16,215 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 09:42:16,242 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 09:42:16,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:42:16,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:16,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:42:16,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:16,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:42:16,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437641688] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:16,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:42:16,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-08-24 09:42:16,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589201423] [2023-08-24 09:42:16,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:42:16,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:42:16,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:16,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:42:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-24 09:42:16,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:42:16,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 118 transitions, 981 flow. Second operand has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 09:42:16,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:16,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:42:16,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:16,701 INFO L124 PetriNetUnfolderBase]: 809/1205 cut-off events. [2023-08-24 09:42:16,701 INFO L125 PetriNetUnfolderBase]: For 3910/3910 co-relation queries the response was YES. [2023-08-24 09:42:16,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5353 conditions, 1205 events. 809/1205 cut-off events. For 3910/3910 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4736 event pairs, 171 based on Foata normal form. 14/1216 useless extension candidates. Maximal degree in co-relation 5320. Up to 649 conditions per place. [2023-08-24 09:42:16,711 INFO L140 encePairwiseOnDemand]: 286/294 looper letters, 78 selfloop transitions, 50 changer transitions 0/138 dead transitions. [2023-08-24 09:42:16,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 138 transitions, 1277 flow [2023-08-24 09:42:16,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:42:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:42:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 798 transitions. [2023-08-24 09:42:16,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2023-08-24 09:42:16,714 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 798 transitions. [2023-08-24 09:42:16,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 798 transitions. [2023-08-24 09:42:16,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:16,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 798 transitions. [2023-08-24 09:42:16,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 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 09:42:16,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:42:16,719 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:42:16,719 INFO L175 Difference]: Start difference. First operand has 73 places, 118 transitions, 981 flow. Second operand 7 states and 798 transitions. [2023-08-24 09:42:16,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 138 transitions, 1277 flow [2023-08-24 09:42:16,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 138 transitions, 1196 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-24 09:42:16,732 INFO L231 Difference]: Finished difference. Result has 72 places, 114 transitions, 964 flow [2023-08-24 09:42:16,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=964, PETRI_PLACES=72, PETRI_TRANSITIONS=114} [2023-08-24 09:42:16,733 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-08-24 09:42:16,733 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 114 transitions, 964 flow [2023-08-24 09:42:16,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 09:42:16,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:16,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:16,743 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 09:42:16,939 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 09:42:16,939 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 09:42:16,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash 560514790, now seen corresponding path program 1 times [2023-08-24 09:42:16,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:16,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003030117] [2023-08-24 09:42:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:16,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:42:17,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:17,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003030117] [2023-08-24 09:42:17,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003030117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:17,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832723567] [2023-08-24 09:42:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:17,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:17,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:17,045 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 09:42:17,070 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 09:42:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:17,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 09:42:17,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:42:17,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:42:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832723567] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:17,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:42:17,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 09:42:17,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273411972] [2023-08-24 09:42:17,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:42:17,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:42:17,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:17,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:42:17,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 09:42:17,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 294 [2023-08-24 09:42:17,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 114 transitions, 964 flow. Second operand has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 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 09:42:17,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:17,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 294 [2023-08-24 09:42:17,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:17,365 INFO L124 PetriNetUnfolderBase]: 743/1087 cut-off events. [2023-08-24 09:42:17,365 INFO L125 PetriNetUnfolderBase]: For 3839/3997 co-relation queries the response was YES. [2023-08-24 09:42:17,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5051 conditions, 1087 events. 743/1087 cut-off events. For 3839/3997 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4441 event pairs, 181 based on Foata normal form. 169/1188 useless extension candidates. Maximal degree in co-relation 5017. Up to 842 conditions per place. [2023-08-24 09:42:17,373 INFO L140 encePairwiseOnDemand]: 289/294 looper letters, 106 selfloop transitions, 14 changer transitions 0/132 dead transitions. [2023-08-24 09:42:17,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 132 transitions, 1323 flow [2023-08-24 09:42:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 09:42:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 09:42:17,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 609 transitions. [2023-08-24 09:42:17,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2023-08-24 09:42:17,376 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 609 transitions. [2023-08-24 09:42:17,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 609 transitions. [2023-08-24 09:42:17,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:17,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 609 transitions. [2023-08-24 09:42:17,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 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 09:42:17,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 09:42:17,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 09:42:17,380 INFO L175 Difference]: Start difference. First operand has 72 places, 114 transitions, 964 flow. Second operand 5 states and 609 transitions. [2023-08-24 09:42:17,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 132 transitions, 1323 flow [2023-08-24 09:42:17,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 132 transitions, 1212 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-24 09:42:17,389 INFO L231 Difference]: Finished difference. Result has 71 places, 115 transitions, 922 flow [2023-08-24 09:42:17,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=922, PETRI_PLACES=71, PETRI_TRANSITIONS=115} [2023-08-24 09:42:17,390 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2023-08-24 09:42:17,390 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 115 transitions, 922 flow [2023-08-24 09:42:17,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 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 09:42:17,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:17,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:17,397 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 09:42:17,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:17,598 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 09:42:17,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash -930821626, now seen corresponding path program 1 times [2023-08-24 09:42:17,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:17,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25601560] [2023-08-24 09:42:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:17,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:18,320 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 09:42:18,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:18,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25601560] [2023-08-24 09:42:18,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25601560] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:18,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252116836] [2023-08-24 09:42:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:18,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:18,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:18,325 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 09:42:18,339 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 09:42:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:18,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 09:42:18,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:18,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:42:18,790 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 14 treesize of output 16 [2023-08-24 09:42:18,881 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:42:18,883 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:18,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-24 09:42:18,978 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 09:42:18,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:19,173 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:19,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 48 [2023-08-24 09:42:19,179 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 22 treesize of output 16 [2023-08-24 09:42:19,909 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 09:42:19,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252116836] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:19,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:19,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-08-24 09:42:19,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573839829] [2023-08-24 09:42:19,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:19,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 09:42:19,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 09:42:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=554, Unknown=1, NotChecked=0, Total=650 [2023-08-24 09:42:19,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 09:42:19,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 115 transitions, 922 flow. Second operand has 26 states, 26 states have (on average 84.3076923076923) internal successors, (2192), 26 states have internal predecessors, (2192), 0 states have call successors, (0), 0 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 09:42:19,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:19,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 09:42:19,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:21,358 INFO L124 PetriNetUnfolderBase]: 1393/2046 cut-off events. [2023-08-24 09:42:21,358 INFO L125 PetriNetUnfolderBase]: For 5989/6161 co-relation queries the response was YES. [2023-08-24 09:42:21,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9530 conditions, 2046 events. 1393/2046 cut-off events. For 5989/6161 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8971 event pairs, 156 based on Foata normal form. 138/2180 useless extension candidates. Maximal degree in co-relation 8332. Up to 1232 conditions per place. [2023-08-24 09:42:21,382 INFO L140 encePairwiseOnDemand]: 283/294 looper letters, 219 selfloop transitions, 140 changer transitions 7/372 dead transitions. [2023-08-24 09:42:21,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 372 transitions, 3576 flow [2023-08-24 09:42:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:42:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:42:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1205 transitions. [2023-08-24 09:42:21,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31527995813710097 [2023-08-24 09:42:21,386 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1205 transitions. [2023-08-24 09:42:21,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1205 transitions. [2023-08-24 09:42:21,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:21,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1205 transitions. [2023-08-24 09:42:21,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 92.6923076923077) internal successors, (1205), 13 states have internal predecessors, (1205), 0 states have call successors, (0), 0 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 09:42:21,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:42:21,395 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:42:21,395 INFO L175 Difference]: Start difference. First operand has 71 places, 115 transitions, 922 flow. Second operand 13 states and 1205 transitions. [2023-08-24 09:42:21,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 372 transitions, 3576 flow [2023-08-24 09:42:21,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 372 transitions, 3539 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-24 09:42:21,420 INFO L231 Difference]: Finished difference. Result has 86 places, 228 transitions, 2335 flow [2023-08-24 09:42:21,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2335, PETRI_PLACES=86, PETRI_TRANSITIONS=228} [2023-08-24 09:42:21,421 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2023-08-24 09:42:21,421 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 228 transitions, 2335 flow [2023-08-24 09:42:21,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.3076923076923) internal successors, (2192), 26 states have internal predecessors, (2192), 0 states have call successors, (0), 0 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 09:42:21,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:21,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:21,436 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 09:42:21,635 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,SelfDestructingSolverStorable11 [2023-08-24 09:42:21,635 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 09:42:21,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1482607534, now seen corresponding path program 1 times [2023-08-24 09:42:21,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:21,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629639789] [2023-08-24 09:42:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:21,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:22,328 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 09:42:22,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:22,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629639789] [2023-08-24 09:42:22,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629639789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:22,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629605140] [2023-08-24 09:42:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:22,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:22,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:22,331 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 09:42:22,335 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 09:42:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:22,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 09:42:22,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:22,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:42:22,532 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:42:22,585 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:42:22,621 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:42:22,703 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:42:22,731 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 09:42:22,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:22,869 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 09:42:22,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629605140] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:22,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:22,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 17 [2023-08-24 09:42:22,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126445910] [2023-08-24 09:42:22,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:22,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:42:22,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:22,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:42:22,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:42:22,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:42:22,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 228 transitions, 2335 flow. Second operand has 19 states, 19 states have (on average 90.6842105263158) internal successors, (1723), 19 states have internal predecessors, (1723), 0 states have call successors, (0), 0 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 09:42:22,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:22,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:42:22,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:23,504 INFO L124 PetriNetUnfolderBase]: 2135/3106 cut-off events. [2023-08-24 09:42:23,505 INFO L125 PetriNetUnfolderBase]: For 14228/14434 co-relation queries the response was YES. [2023-08-24 09:42:23,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16820 conditions, 3106 events. 2135/3106 cut-off events. For 14228/14434 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 14495 event pairs, 207 based on Foata normal form. 181/3223 useless extension candidates. Maximal degree in co-relation 16408. Up to 2044 conditions per place. [2023-08-24 09:42:23,532 INFO L140 encePairwiseOnDemand]: 283/294 looper letters, 222 selfloop transitions, 194 changer transitions 1/429 dead transitions. [2023-08-24 09:42:23,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 429 transitions, 5039 flow [2023-08-24 09:42:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:42:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:42:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 792 transitions. [2023-08-24 09:42:23,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2023-08-24 09:42:23,535 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 792 transitions. [2023-08-24 09:42:23,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 792 transitions. [2023-08-24 09:42:23,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:23,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 792 transitions. [2023-08-24 09:42:23,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 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 09:42:23,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:42:23,540 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:42:23,540 INFO L175 Difference]: Start difference. First operand has 86 places, 228 transitions, 2335 flow. Second operand 8 states and 792 transitions. [2023-08-24 09:42:23,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 429 transitions, 5039 flow [2023-08-24 09:42:23,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 429 transitions, 4811 flow, removed 113 selfloop flow, removed 1 redundant places. [2023-08-24 09:42:23,590 INFO L231 Difference]: Finished difference. Result has 96 places, 337 transitions, 3972 flow [2023-08-24 09:42:23,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3972, PETRI_PLACES=96, PETRI_TRANSITIONS=337} [2023-08-24 09:42:23,590 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2023-08-24 09:42:23,590 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 337 transitions, 3972 flow [2023-08-24 09:42:23,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.6842105263158) internal successors, (1723), 19 states have internal predecessors, (1723), 0 states have call successors, (0), 0 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 09:42:23,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:23,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:23,597 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 09:42:23,797 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,SelfDestructingSolverStorable12 [2023-08-24 09:42:23,797 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 09:42:23,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1084770934, now seen corresponding path program 2 times [2023-08-24 09:42:23,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:23,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770155898] [2023-08-24 09:42:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:23,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:24,548 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 09:42:24,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:24,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770155898] [2023-08-24 09:42:24,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770155898] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:24,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810189016] [2023-08-24 09:42:24,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:42:24,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:24,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:24,550 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 09:42:24,553 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 09:42:24,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:42:24,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:24,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 09:42:24,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:24,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:42:24,820 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 14 treesize of output 16 [2023-08-24 09:42:24,871 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:42:24,909 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 09:42:24,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:24,987 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_527 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_527) c_~A~0.base) c_~A~0.offset)) 4294967296) (mod c_~sum1~0 4294967296))) is different from false [2023-08-24 09:42:24,999 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:25,000 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-08-24 09:42:25,006 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 09:42:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-24 09:42:25,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810189016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:25,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:25,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2023-08-24 09:42:25,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628348309] [2023-08-24 09:42:25,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:25,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:42:25,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:25,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:42:25,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=337, Unknown=1, NotChecked=38, Total=462 [2023-08-24 09:42:25,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:42:25,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 337 transitions, 3972 flow. Second operand has 22 states, 22 states have (on average 90.45454545454545) internal successors, (1990), 22 states have internal predecessors, (1990), 0 states have call successors, (0), 0 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 09:42:25,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:25,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:42:25,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:26,199 INFO L124 PetriNetUnfolderBase]: 2525/3674 cut-off events. [2023-08-24 09:42:26,199 INFO L125 PetriNetUnfolderBase]: For 22710/22968 co-relation queries the response was YES. [2023-08-24 09:42:26,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22025 conditions, 3674 events. 2525/3674 cut-off events. For 22710/22968 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 17713 event pairs, 226 based on Foata normal form. 227/3828 useless extension candidates. Maximal degree in co-relation 21645. Up to 2027 conditions per place. [2023-08-24 09:42:26,231 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 192 selfloop transitions, 278 changer transitions 1/483 dead transitions. [2023-08-24 09:42:26,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 483 transitions, 6338 flow [2023-08-24 09:42:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:42:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:42:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 792 transitions. [2023-08-24 09:42:26,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2023-08-24 09:42:26,233 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 792 transitions. [2023-08-24 09:42:26,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 792 transitions. [2023-08-24 09:42:26,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:26,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 792 transitions. [2023-08-24 09:42:26,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 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 09:42:26,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:42:26,238 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:42:26,238 INFO L175 Difference]: Start difference. First operand has 96 places, 337 transitions, 3972 flow. Second operand 8 states and 792 transitions. [2023-08-24 09:42:26,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 483 transitions, 6338 flow [2023-08-24 09:42:26,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 483 transitions, 6175 flow, removed 55 selfloop flow, removed 2 redundant places. [2023-08-24 09:42:26,327 INFO L231 Difference]: Finished difference. Result has 104 places, 397 transitions, 5437 flow [2023-08-24 09:42:26,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=3809, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5437, PETRI_PLACES=104, PETRI_TRANSITIONS=397} [2023-08-24 09:42:26,328 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2023-08-24 09:42:26,328 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 397 transitions, 5437 flow [2023-08-24 09:42:26,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 90.45454545454545) internal successors, (1990), 22 states have internal predecessors, (1990), 0 states have call successors, (0), 0 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 09:42:26,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:26,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:26,334 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 09:42:26,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 09:42:26,533 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 09:42:26,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:26,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1022520044, now seen corresponding path program 3 times [2023-08-24 09:42:26,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:26,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26188194] [2023-08-24 09:42:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:26,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:27,180 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 09:42:27,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:27,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26188194] [2023-08-24 09:42:27,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26188194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:27,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321770037] [2023-08-24 09:42:27,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:42:27,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:27,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:27,185 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 09:42:27,188 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 09:42:27,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:42:27,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:27,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 09:42:27,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:27,388 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:42:27,424 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 09:42:27,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:27,476 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:27,477 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-08-24 09:42:27,830 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 09:42:27,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321770037] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:27,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:27,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 14 [2023-08-24 09:42:27,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326006262] [2023-08-24 09:42:27,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:27,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 09:42:27,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:27,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 09:42:27,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-08-24 09:42:27,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:42:27,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 397 transitions, 5437 flow. Second operand has 16 states, 16 states have (on average 91.1875) internal successors, (1459), 16 states have internal predecessors, (1459), 0 states have call successors, (0), 0 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 09:42:27,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:27,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:42:27,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:28,566 INFO L124 PetriNetUnfolderBase]: 2945/4241 cut-off events. [2023-08-24 09:42:28,566 INFO L125 PetriNetUnfolderBase]: For 34302/34630 co-relation queries the response was YES. [2023-08-24 09:42:28,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28662 conditions, 4241 events. 2945/4241 cut-off events. For 34302/34630 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 20613 event pairs, 403 based on Foata normal form. 297/4431 useless extension candidates. Maximal degree in co-relation 28263. Up to 3562 conditions per place. [2023-08-24 09:42:28,599 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 371 selfloop transitions, 146 changer transitions 1/530 dead transitions. [2023-08-24 09:42:28,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 530 transitions, 7992 flow [2023-08-24 09:42:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:42:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:42:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 784 transitions. [2023-08-24 09:42:28,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-24 09:42:28,601 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 784 transitions. [2023-08-24 09:42:28,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 784 transitions. [2023-08-24 09:42:28,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:28,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 784 transitions. [2023-08-24 09:42:28,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.0) internal successors, (784), 8 states have internal predecessors, (784), 0 states have call successors, (0), 0 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 09:42:28,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:42:28,605 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:42:28,605 INFO L175 Difference]: Start difference. First operand has 104 places, 397 transitions, 5437 flow. Second operand 8 states and 784 transitions. [2023-08-24 09:42:28,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 530 transitions, 7992 flow [2023-08-24 09:42:28,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 530 transitions, 7789 flow, removed 46 selfloop flow, removed 3 redundant places. [2023-08-24 09:42:28,750 INFO L231 Difference]: Finished difference. Result has 112 places, 471 transitions, 6836 flow [2023-08-24 09:42:28,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=5254, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6836, PETRI_PLACES=112, PETRI_TRANSITIONS=471} [2023-08-24 09:42:28,750 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2023-08-24 09:42:28,751 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 471 transitions, 6836 flow [2023-08-24 09:42:28,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.1875) internal successors, (1459), 16 states have internal predecessors, (1459), 0 states have call successors, (0), 0 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 09:42:28,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:28,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:28,767 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 09:42:28,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 09:42:28,967 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 09:42:28,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:28,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1824941946, now seen corresponding path program 2 times [2023-08-24 09:42:28,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:28,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385751893] [2023-08-24 09:42:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:28,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:29,884 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 09:42:29,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:29,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385751893] [2023-08-24 09:42:29,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385751893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:29,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671286410] [2023-08-24 09:42:29,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:42:29,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:29,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:29,889 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 09:42:29,892 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 09:42:29,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:42:29,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:30,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 09:42:30,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:30,271 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:42:30,273 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:30,273 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-24 09:42:30,310 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 09:42:30,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:30,364 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:30,364 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-08-24 09:42:30,782 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 09:42:30,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671286410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:30,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:30,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 27 [2023-08-24 09:42:30,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839616636] [2023-08-24 09:42:30,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:30,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 09:42:30,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:30,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 09:42:30,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2023-08-24 09:42:30,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 09:42:30,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 471 transitions, 6836 flow. Second operand has 29 states, 29 states have (on average 74.37931034482759) internal successors, (2157), 29 states have internal predecessors, (2157), 0 states have call successors, (0), 0 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 09:42:30,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:30,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 09:42:30,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:31,875 INFO L124 PetriNetUnfolderBase]: 3197/4644 cut-off events. [2023-08-24 09:42:31,875 INFO L125 PetriNetUnfolderBase]: For 34952/34952 co-relation queries the response was YES. [2023-08-24 09:42:31,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31492 conditions, 4644 events. 3197/4644 cut-off events. For 34952/34952 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22216 event pairs, 498 based on Foata normal form. 1/4644 useless extension candidates. Maximal degree in co-relation 31078. Up to 4102 conditions per place. [2023-08-24 09:42:31,916 INFO L140 encePairwiseOnDemand]: 283/294 looper letters, 442 selfloop transitions, 126 changer transitions 1/569 dead transitions. [2023-08-24 09:42:31,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 569 transitions, 8983 flow [2023-08-24 09:42:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:42:31,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:42:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1031 transitions. [2023-08-24 09:42:31,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2697540554683412 [2023-08-24 09:42:31,918 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1031 transitions. [2023-08-24 09:42:31,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1031 transitions. [2023-08-24 09:42:31,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:31,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1031 transitions. [2023-08-24 09:42:31,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 79.3076923076923) internal successors, (1031), 13 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 09:42:31,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:42:31,924 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:42:31,924 INFO L175 Difference]: Start difference. First operand has 112 places, 471 transitions, 6836 flow. Second operand 13 states and 1031 transitions. [2023-08-24 09:42:31,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 569 transitions, 8983 flow [2023-08-24 09:42:32,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 569 transitions, 8673 flow, removed 34 selfloop flow, removed 4 redundant places. [2023-08-24 09:42:32,115 INFO L231 Difference]: Finished difference. Result has 127 places, 515 transitions, 7660 flow [2023-08-24 09:42:32,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=6566, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7660, PETRI_PLACES=127, PETRI_TRANSITIONS=515} [2023-08-24 09:42:32,117 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2023-08-24 09:42:32,117 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 515 transitions, 7660 flow [2023-08-24 09:42:32,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 74.37931034482759) internal successors, (2157), 29 states have internal predecessors, (2157), 0 states have call successors, (0), 0 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 09:42:32,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:32,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:32,127 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 09:42:32,323 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,SelfDestructingSolverStorable15 [2023-08-24 09:42:32,323 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 09:42:32,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:32,324 INFO L85 PathProgramCache]: Analyzing trace with hash -385810400, now seen corresponding path program 4 times [2023-08-24 09:42:32,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:32,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310628161] [2023-08-24 09:42:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:32,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:32,683 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 09:42:32,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:32,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310628161] [2023-08-24 09:42:32,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310628161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:32,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189506188] [2023-08-24 09:42:32,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:42:32,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:32,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:32,689 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 09:42:32,693 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 09:42:32,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:42:32,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:32,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 09:42:32,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:32,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:42:32,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:42:32,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:42:33,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:42:33,091 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:42:33,136 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 09:42:33,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:33,230 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_664 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_664) c_~A~0.base))) (= (mod (+ (select .cse0 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4))) c_~sum1~0) 4294967296) (mod (+ (select .cse0 c_~A~0.offset) c_~sum3~0 c_~sum2~0) 4294967296)))) is different from false [2023-08-24 09:42:33,242 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_663 (Array Int Int)) (v_ArrVal_664 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_663) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_664) c_~A~0.base))) (= (mod (+ c_~sum1~0 (select .cse0 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) 4294967296) (mod (+ c_~sum3~0 (select .cse0 c_~A~0.offset) c_~sum2~0) 4294967296)))) is different from false [2023-08-24 09:42:33,277 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 09:42:33,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189506188] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:33,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:33,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 18 [2023-08-24 09:42:33,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842962906] [2023-08-24 09:42:33,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:33,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:42:33,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:33,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:42:33,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=226, Unknown=2, NotChecked=66, Total=380 [2023-08-24 09:42:33,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:42:33,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 515 transitions, 7660 flow. Second operand has 20 states, 20 states have (on average 91.05) internal successors, (1821), 20 states have internal predecessors, (1821), 0 states have call successors, (0), 0 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 09:42:33,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:33,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:42:33,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:34,115 INFO L124 PetriNetUnfolderBase]: 3219/4661 cut-off events. [2023-08-24 09:42:34,116 INFO L125 PetriNetUnfolderBase]: For 44435/44824 co-relation queries the response was YES. [2023-08-24 09:42:34,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33213 conditions, 4661 events. 3219/4661 cut-off events. For 44435/44824 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23256 event pairs, 459 based on Foata normal form. 340/4881 useless extension candidates. Maximal degree in co-relation 32779. Up to 4137 conditions per place. [2023-08-24 09:42:34,211 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 424 selfloop transitions, 124 changer transitions 1/562 dead transitions. [2023-08-24 09:42:34,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 562 transitions, 9131 flow [2023-08-24 09:42:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:42:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:42:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 781 transitions. [2023-08-24 09:42:34,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3320578231292517 [2023-08-24 09:42:34,214 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 781 transitions. [2023-08-24 09:42:34,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 781 transitions. [2023-08-24 09:42:34,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:34,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 781 transitions. [2023-08-24 09:42:34,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 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 09:42:34,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:42:34,218 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:42:34,218 INFO L175 Difference]: Start difference. First operand has 127 places, 515 transitions, 7660 flow. Second operand 8 states and 781 transitions. [2023-08-24 09:42:34,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 562 transitions, 9131 flow [2023-08-24 09:42:34,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 562 transitions, 9013 flow, removed 58 selfloop flow, removed 1 redundant places. [2023-08-24 09:42:34,361 INFO L231 Difference]: Finished difference. Result has 135 places, 523 transitions, 7950 flow [2023-08-24 09:42:34,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=7562, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7950, PETRI_PLACES=135, PETRI_TRANSITIONS=523} [2023-08-24 09:42:34,361 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2023-08-24 09:42:34,361 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 523 transitions, 7950 flow [2023-08-24 09:42:34,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 91.05) internal successors, (1821), 20 states have internal predecessors, (1821), 0 states have call successors, (0), 0 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 09:42:34,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:34,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:34,368 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 09:42:34,568 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,SelfDestructingSolverStorable16 [2023-08-24 09:42:34,568 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 09:42:34,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:34,569 INFO L85 PathProgramCache]: Analyzing trace with hash -713549884, now seen corresponding path program 3 times [2023-08-24 09:42:34,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:34,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163374774] [2023-08-24 09:42:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:34,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:35,151 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 09:42:35,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:35,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163374774] [2023-08-24 09:42:35,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163374774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:35,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858032441] [2023-08-24 09:42:35,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:42:35,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:35,153 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 09:42:35,157 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 09:42:35,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:42:35,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:35,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 09:42:35,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:35,582 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:42:35,584 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:35,584 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-24 09:42:35,649 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 09:42:35,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:35,704 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:35,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-08-24 09:42:36,159 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 09:42:36,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858032441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:36,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:36,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2023-08-24 09:42:36,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064987449] [2023-08-24 09:42:36,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:36,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 09:42:36,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 09:42:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-08-24 09:42:36,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 09:42:36,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 523 transitions, 7950 flow. Second operand has 26 states, 26 states have (on average 84.42307692307692) internal successors, (2195), 26 states have internal predecessors, (2195), 0 states have call successors, (0), 0 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 09:42:36,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:36,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 09:42:36,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:37,495 INFO L124 PetriNetUnfolderBase]: 3449/5034 cut-off events. [2023-08-24 09:42:37,496 INFO L125 PetriNetUnfolderBase]: For 42007/42007 co-relation queries the response was YES. [2023-08-24 09:42:37,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35010 conditions, 5034 events. 3449/5034 cut-off events. For 42007/42007 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24639 event pairs, 594 based on Foata normal form. 1/5035 useless extension candidates. Maximal degree in co-relation 34572. Up to 4430 conditions per place. [2023-08-24 09:42:37,589 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 469 selfloop transitions, 150 changer transitions 2/621 dead transitions. [2023-08-24 09:42:37,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 621 transitions, 10060 flow [2023-08-24 09:42:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 09:42:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 09:42:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1352 transitions. [2023-08-24 09:42:37,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30657596371882084 [2023-08-24 09:42:37,591 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1352 transitions. [2023-08-24 09:42:37,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1352 transitions. [2023-08-24 09:42:37,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:37,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1352 transitions. [2023-08-24 09:42:37,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 90.13333333333334) internal successors, (1352), 15 states have internal predecessors, (1352), 0 states have call successors, (0), 0 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 09:42:37,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 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 09:42:37,597 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 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 09:42:37,597 INFO L175 Difference]: Start difference. First operand has 135 places, 523 transitions, 7950 flow. Second operand 15 states and 1352 transitions. [2023-08-24 09:42:37,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 621 transitions, 10060 flow [2023-08-24 09:42:37,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 621 transitions, 9761 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-24 09:42:37,785 INFO L231 Difference]: Finished difference. Result has 149 places, 547 transitions, 8381 flow [2023-08-24 09:42:37,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=7671, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8381, PETRI_PLACES=149, PETRI_TRANSITIONS=547} [2023-08-24 09:42:37,785 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2023-08-24 09:42:37,786 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 547 transitions, 8381 flow [2023-08-24 09:42:37,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.42307692307692) internal successors, (2195), 26 states have internal predecessors, (2195), 0 states have call successors, (0), 0 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 09:42:37,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:37,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:37,791 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 09:42:37,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:37,987 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 09:42:37,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash -252953414, now seen corresponding path program 4 times [2023-08-24 09:42:37,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:37,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389507384] [2023-08-24 09:42:37,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:37,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:42:38,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389507384] [2023-08-24 09:42:38,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389507384] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967413854] [2023-08-24 09:42:38,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:42:38,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:38,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:38,501 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 09:42:38,511 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 09:42:38,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:42:38,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:38,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 09:42:38,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:38,880 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:38,880 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-08-24 09:42:38,960 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 09:42:38,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:39,080 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:39,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-08-24 09:42:39,407 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 09:42:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967413854] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:39,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:39,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 24 [2023-08-24 09:42:39,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254404693] [2023-08-24 09:42:39,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:39,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 09:42:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 09:42:39,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2023-08-24 09:42:39,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 09:42:39,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 547 transitions, 8381 flow. Second operand has 26 states, 26 states have (on average 84.65384615384616) internal successors, (2201), 26 states have internal predecessors, (2201), 0 states have call successors, (0), 0 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 09:42:39,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:39,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 09:42:39,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:42,494 INFO L124 PetriNetUnfolderBase]: 4303/6241 cut-off events. [2023-08-24 09:42:42,494 INFO L125 PetriNetUnfolderBase]: For 52388/52388 co-relation queries the response was YES. [2023-08-24 09:42:42,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43055 conditions, 6241 events. 4303/6241 cut-off events. For 52388/52388 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31310 event pairs, 562 based on Foata normal form. 2/6243 useless extension candidates. Maximal degree in co-relation 42582. Up to 4251 conditions per place. [2023-08-24 09:42:42,540 INFO L140 encePairwiseOnDemand]: 281/294 looper letters, 456 selfloop transitions, 543 changer transitions 11/1010 dead transitions. [2023-08-24 09:42:42,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1010 transitions, 15412 flow [2023-08-24 09:42:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-24 09:42:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-24 09:42:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4467 transitions. [2023-08-24 09:42:42,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30387755102040814 [2023-08-24 09:42:42,548 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4467 transitions. [2023-08-24 09:42:42,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4467 transitions. [2023-08-24 09:42:42,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:42:42,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4467 transitions. [2023-08-24 09:42:42,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 89.34) internal successors, (4467), 50 states have internal predecessors, (4467), 0 states have call successors, (0), 0 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 09:42:42,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 294.0) internal successors, (14994), 51 states have internal predecessors, (14994), 0 states have call successors, (0), 0 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 09:42:42,570 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 294.0) internal successors, (14994), 51 states have internal predecessors, (14994), 0 states have call successors, (0), 0 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 09:42:42,570 INFO L175 Difference]: Start difference. First operand has 149 places, 547 transitions, 8381 flow. Second operand 50 states and 4467 transitions. [2023-08-24 09:42:42,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1010 transitions, 15412 flow [2023-08-24 09:42:42,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 1010 transitions, 15093 flow, removed 55 selfloop flow, removed 7 redundant places. [2023-08-24 09:42:42,829 INFO L231 Difference]: Finished difference. Result has 206 places, 844 transitions, 13551 flow [2023-08-24 09:42:42,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=8150, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=13551, PETRI_PLACES=206, PETRI_TRANSITIONS=844} [2023-08-24 09:42:42,830 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 176 predicate places. [2023-08-24 09:42:42,830 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 844 transitions, 13551 flow [2023-08-24 09:42:42,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.65384615384616) internal successors, (2201), 26 states have internal predecessors, (2201), 0 states have call successors, (0), 0 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 09:42:42,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:42,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:42,836 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 09:42:43,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:43,032 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 09:42:43,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:43,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1569067930, now seen corresponding path program 5 times [2023-08-24 09:42:43,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:43,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862947538] [2023-08-24 09:42:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:43,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:43,808 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 09:42:43,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:43,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862947538] [2023-08-24 09:42:43,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862947538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:43,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790006556] [2023-08-24 09:42:43,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:42:43,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:43,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:43,813 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 09:42:43,837 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 09:42:43,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:42:43,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:43,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 09:42:43,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:44,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:42:44,048 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:42:44,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:42:44,171 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:42:44,381 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:42:44,433 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 09:42:44,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:44,875 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:44,875 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 66 treesize of output 55 [2023-08-24 09:42:44,886 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:44,886 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 462 [2023-08-24 09:42:44,901 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:44,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 198 [2023-08-24 09:42:44,916 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:44,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 92 [2023-08-24 09:42:44,931 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:42:44,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 91 [2023-08-24 09:42:46,503 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 09:42:46,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790006556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:46,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:46,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 29 [2023-08-24 09:42:46,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527660776] [2023-08-24 09:42:46,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:46,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 09:42:46,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:46,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 09:42:46,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=764, Unknown=5, NotChecked=0, Total=930 [2023-08-24 09:42:46,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 09:42:46,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 844 transitions, 13551 flow. Second operand has 31 states, 31 states have (on average 74.2258064516129) internal successors, (2301), 31 states have internal predecessors, (2301), 0 states have call successors, (0), 0 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 09:42:46,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:46,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 09:42:46,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:42:50,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:42:52,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:42:54,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:43:00,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:43:03,276 INFO L124 PetriNetUnfolderBase]: 4930/7170 cut-off events. [2023-08-24 09:43:03,277 INFO L125 PetriNetUnfolderBase]: For 69193/69193 co-relation queries the response was YES. [2023-08-24 09:43:03,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53376 conditions, 7170 events. 4930/7170 cut-off events. For 69193/69193 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 36875 event pairs, 685 based on Foata normal form. 4/7174 useless extension candidates. Maximal degree in co-relation 52837. Up to 6052 conditions per place. [2023-08-24 09:43:03,326 INFO L140 encePairwiseOnDemand]: 280/294 looper letters, 821 selfloop transitions, 263 changer transitions 3/1087 dead transitions. [2023-08-24 09:43:03,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1087 transitions, 18662 flow [2023-08-24 09:43:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 09:43:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 09:43:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2227 transitions. [2023-08-24 09:43:03,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27052964042759964 [2023-08-24 09:43:03,332 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2227 transitions. [2023-08-24 09:43:03,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2227 transitions. [2023-08-24 09:43:03,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:43:03,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2227 transitions. [2023-08-24 09:43:03,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 79.53571428571429) internal successors, (2227), 28 states have internal predecessors, (2227), 0 states have call successors, (0), 0 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 09:43:03,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 294.0) internal successors, (8526), 29 states have internal predecessors, (8526), 0 states have call successors, (0), 0 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 09:43:03,342 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 294.0) internal successors, (8526), 29 states have internal predecessors, (8526), 0 states have call successors, (0), 0 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 09:43:03,342 INFO L175 Difference]: Start difference. First operand has 206 places, 844 transitions, 13551 flow. Second operand 28 states and 2227 transitions. [2023-08-24 09:43:03,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1087 transitions, 18662 flow [2023-08-24 09:43:03,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 1087 transitions, 16335 flow, removed 1035 selfloop flow, removed 7 redundant places. [2023-08-24 09:43:03,899 INFO L231 Difference]: Finished difference. Result has 238 places, 939 transitions, 13726 flow [2023-08-24 09:43:03,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=11705, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13726, PETRI_PLACES=238, PETRI_TRANSITIONS=939} [2023-08-24 09:43:03,900 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2023-08-24 09:43:03,900 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 939 transitions, 13726 flow [2023-08-24 09:43:03,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 74.2258064516129) internal successors, (2301), 31 states have internal predecessors, (2301), 0 states have call successors, (0), 0 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 09:43:03,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:43:03,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:43:03,917 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 09:43:04,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:04,117 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 09:43:04,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:43:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1342128478, now seen corresponding path program 5 times [2023-08-24 09:43:04,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:43:04,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370844658] [2023-08-24 09:43:04,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:43:04,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:43:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:43:04,777 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 09:43:04,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:43:04,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370844658] [2023-08-24 09:43:04,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370844658] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:43:04,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698119240] [2023-08-24 09:43:04,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:43:04,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:04,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:43:04,779 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 09:43:04,781 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 09:43:04,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:43:04,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:43:04,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 09:43:04,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:43:04,942 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:43:04,982 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:43:05,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:43:05,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:43:05,174 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 14 treesize of output 16 [2023-08-24 09:43:05,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:43:05,244 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 09:43:05,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:43:05,406 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_850 (Array Int Int))) (= (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_850) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) 4294967296))) is different from false [2023-08-24 09:43:05,476 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_849 (Array Int Int)) (v_ArrVal_850 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_849))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ c_~sum1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_850) c_~A~0.base) c_~A~0.offset)) 4294967296)))) is different from false [2023-08-24 09:43:05,489 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_849 (Array Int Int)) (v_ArrVal_848 (Array Int Int)) (v_ArrVal_850 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_848) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_849))) (= (mod (+ c_~sum1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_850) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296) (mod (+ c_~sum3~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|) c_~sum2~0) 4294967296)))) is different from false [2023-08-24 09:43:05,497 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:43:05,498 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 59 treesize of output 48 [2023-08-24 09:43:05,504 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6838 treesize of output 6454 [2023-08-24 09:43:05,515 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 93 treesize of output 87 [2023-08-24 09:43:05,518 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 186 treesize of output 178 [2023-08-24 09:43:05,534 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 94 treesize of output 82 [2023-08-24 09:43:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 09:43:06,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698119240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:43:06,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:43:06,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-24 09:43:06,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387824685] [2023-08-24 09:43:06,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:43:06,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 09:43:06,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:43:06,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 09:43:06,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=433, Unknown=11, NotChecked=138, Total=702 [2023-08-24 09:43:06,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:43:06,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 939 transitions, 13726 flow. Second operand has 27 states, 27 states have (on average 90.0) internal successors, (2430), 27 states have internal predecessors, (2430), 0 states have call successors, (0), 0 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 09:43:06,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:43:06,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:43:06,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:43:07,140 WARN L839 $PredicateComparison]: unable to prove that (and (<= c_~sum2~0 c_~sum1~0) (= c_~sum3~0 0) (forall ((v_ArrVal_850 (Array Int Int))) (= (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_850) c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296) (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum3~0 c_~sum2~0) 4294967296))) (<= c_~sum1~0 c_~sum2~0)) is different from false [2023-08-24 09:43:08,749 INFO L124 PetriNetUnfolderBase]: 5076/7387 cut-off events. [2023-08-24 09:43:08,749 INFO L125 PetriNetUnfolderBase]: For 79115/79530 co-relation queries the response was YES. [2023-08-24 09:43:08,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55738 conditions, 7387 events. 5076/7387 cut-off events. For 79115/79530 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 39775 event pairs, 598 based on Foata normal form. 336/7533 useless extension candidates. Maximal degree in co-relation 55408. Up to 6385 conditions per place. [2023-08-24 09:43:08,803 INFO L140 encePairwiseOnDemand]: 280/294 looper letters, 767 selfloop transitions, 219 changer transitions 1/1011 dead transitions. [2023-08-24 09:43:08,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1011 transitions, 16498 flow [2023-08-24 09:43:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:43:08,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:43:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 878 transitions. [2023-08-24 09:43:08,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3318216175359032 [2023-08-24 09:43:08,806 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 878 transitions. [2023-08-24 09:43:08,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 878 transitions. [2023-08-24 09:43:08,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:43:08,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 878 transitions. [2023-08-24 09:43:08,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.55555555555556) internal successors, (878), 9 states have internal predecessors, (878), 0 states have call successors, (0), 0 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 09:43:08,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 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 09:43:08,809 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 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 09:43:08,809 INFO L175 Difference]: Start difference. First operand has 238 places, 939 transitions, 13726 flow. Second operand 9 states and 878 transitions. [2023-08-24 09:43:08,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1011 transitions, 16498 flow [2023-08-24 09:43:09,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 1011 transitions, 16058 flow, removed 102 selfloop flow, removed 13 redundant places. [2023-08-24 09:43:09,268 INFO L231 Difference]: Finished difference. Result has 235 places, 973 transitions, 14307 flow [2023-08-24 09:43:09,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=13286, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14307, PETRI_PLACES=235, PETRI_TRANSITIONS=973} [2023-08-24 09:43:09,269 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2023-08-24 09:43:09,269 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 973 transitions, 14307 flow [2023-08-24 09:43:09,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 90.0) internal successors, (2430), 27 states have internal predecessors, (2430), 0 states have call successors, (0), 0 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 09:43:09,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:43:09,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:43:09,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-24 09:43:09,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:09,470 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 09:43:09,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:43:09,471 INFO L85 PathProgramCache]: Analyzing trace with hash -491606162, now seen corresponding path program 6 times [2023-08-24 09:43:09,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:43:09,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531740869] [2023-08-24 09:43:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:43:09,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:43:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:43:10,068 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 09:43:10,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:43:10,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531740869] [2023-08-24 09:43:10,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531740869] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:43:10,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965672880] [2023-08-24 09:43:10,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:43:10,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:10,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:43:10,069 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 09:43:10,071 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 09:43:10,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:43:10,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:43:10,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 09:43:10,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:43:10,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:43:10,391 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 14 treesize of output 16 [2023-08-24 09:43:10,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:43:10,484 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 09:43:10,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:43:10,623 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:43:10,624 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 48 [2023-08-24 09:43:10,628 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 22 treesize of output 16 [2023-08-24 09:43:11,019 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 09:43:11,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965672880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:43:11,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:43:11,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-08-24 09:43:11,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997620079] [2023-08-24 09:43:11,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:43:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:43:11,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:43:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:43:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=397, Unknown=3, NotChecked=0, Total=506 [2023-08-24 09:43:11,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:43:11,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 973 transitions, 14307 flow. Second operand has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 09:43:11,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:43:11,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:43:11,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:43:13,198 INFO L124 PetriNetUnfolderBase]: 5257/7643 cut-off events. [2023-08-24 09:43:13,198 INFO L125 PetriNetUnfolderBase]: For 88494/89076 co-relation queries the response was YES. [2023-08-24 09:43:13,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60040 conditions, 7643 events. 5257/7643 cut-off events. For 88494/89076 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 41307 event pairs, 672 based on Foata normal form. 380/7829 useless extension candidates. Maximal degree in co-relation 59635. Up to 6667 conditions per place. [2023-08-24 09:43:13,260 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 788 selfloop transitions, 229 changer transitions 1/1042 dead transitions. [2023-08-24 09:43:13,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 1042 transitions, 17144 flow [2023-08-24 09:43:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:43:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:43:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 784 transitions. [2023-08-24 09:43:13,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-24 09:43:13,261 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 784 transitions. [2023-08-24 09:43:13,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 784 transitions. [2023-08-24 09:43:13,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:43:13,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 784 transitions. [2023-08-24 09:43:13,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.0) internal successors, (784), 8 states have internal predecessors, (784), 0 states have call successors, (0), 0 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 09:43:13,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:43:13,264 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:43:13,264 INFO L175 Difference]: Start difference. First operand has 235 places, 973 transitions, 14307 flow. Second operand 8 states and 784 transitions. [2023-08-24 09:43:13,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 1042 transitions, 17144 flow [2023-08-24 09:43:13,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 1042 transitions, 16743 flow, removed 86 selfloop flow, removed 5 redundant places. [2023-08-24 09:43:13,742 INFO L231 Difference]: Finished difference. Result has 239 places, 992 transitions, 14848 flow [2023-08-24 09:43:13,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=13906, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14848, PETRI_PLACES=239, PETRI_TRANSITIONS=992} [2023-08-24 09:43:13,743 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2023-08-24 09:43:13,743 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 992 transitions, 14848 flow [2023-08-24 09:43:13,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 09:43:13,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:43:13,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:43:13,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 09:43:13,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:13,952 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 09:43:13,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:43:13,953 INFO L85 PathProgramCache]: Analyzing trace with hash -500303968, now seen corresponding path program 6 times [2023-08-24 09:43:13,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:43:13,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751669024] [2023-08-24 09:43:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:43:13,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:43:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:43:14,994 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 09:43:14,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:43:14,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751669024] [2023-08-24 09:43:14,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751669024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:43:14,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892875861] [2023-08-24 09:43:14,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:43:14,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:14,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:43:14,995 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 09:43:14,999 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 09:43:15,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:43:15,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:43:15,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 09:43:15,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:43:15,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:43:15,225 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:43:15,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:43:15,434 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 14 treesize of output 16 [2023-08-24 09:43:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:43:15,531 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 14 treesize of output 16 [2023-08-24 09:43:15,676 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:43:15,679 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:43:15,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-24 09:43:15,808 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 09:43:15,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:43:16,349 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_942 (Array Int Int)) (v_ArrVal_944 (Array Int Int)) (v_ArrVal_943 (Array Int Int)) (~M~0 Int)) (or (< 0 ~M~0) (< ~M~0 0) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_942))) (= (mod (+ (select (select (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_943) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_944) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ c_~sum1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296))))) is different from false [2023-08-24 09:43:16,361 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:43:16,361 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 60 treesize of output 49 [2023-08-24 09:43:16,378 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:43:16,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3990 treesize of output 3610 [2023-08-24 09:43:16,392 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 110 treesize of output 86 [2023-08-24 09:43:16,399 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 105 treesize of output 93 [2023-08-24 09:43:16,412 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:43:16,413 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 170 [2023-08-24 09:43:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 09:43:16,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892875861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:43:16,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:43:16,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-24 09:43:16,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511650377] [2023-08-24 09:43:16,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:43:16,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:43:16,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:43:16,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:43:16,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=932, Unknown=9, NotChecked=62, Total=1122 [2023-08-24 09:43:16,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 09:43:16,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 992 transitions, 14848 flow. Second operand has 34 states, 34 states have (on average 73.8529411764706) internal successors, (2511), 34 states have internal predecessors, (2511), 0 states have call successors, (0), 0 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 09:43:16,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:43:16,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 09:43:16,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:43:24,279 INFO L124 PetriNetUnfolderBase]: 6692/9869 cut-off events. [2023-08-24 09:43:24,279 INFO L125 PetriNetUnfolderBase]: For 111885/111885 co-relation queries the response was YES. [2023-08-24 09:43:24,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75768 conditions, 9869 events. 6692/9869 cut-off events. For 111885/111885 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 55333 event pairs, 839 based on Foata normal form. 5/9860 useless extension candidates. Maximal degree in co-relation 75308. Up to 6227 conditions per place. [2023-08-24 09:43:24,364 INFO L140 encePairwiseOnDemand]: 280/294 looper letters, 757 selfloop transitions, 558 changer transitions 5/1320 dead transitions. [2023-08-24 09:43:24,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1320 transitions, 21624 flow [2023-08-24 09:43:24,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 09:43:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 09:43:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1578 transitions. [2023-08-24 09:43:24,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2824919441460795 [2023-08-24 09:43:24,367 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1578 transitions. [2023-08-24 09:43:24,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1578 transitions. [2023-08-24 09:43:24,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:43:24,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1578 transitions. [2023-08-24 09:43:24,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.05263157894737) internal successors, (1578), 19 states have internal predecessors, (1578), 0 states have call successors, (0), 0 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 09:43:24,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 294.0) internal successors, (5880), 20 states have internal predecessors, (5880), 0 states have call successors, (0), 0 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 09:43:24,373 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 294.0) internal successors, (5880), 20 states have internal predecessors, (5880), 0 states have call successors, (0), 0 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 09:43:24,373 INFO L175 Difference]: Start difference. First operand has 239 places, 992 transitions, 14848 flow. Second operand 19 states and 1578 transitions. [2023-08-24 09:43:24,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1320 transitions, 21624 flow [2023-08-24 09:43:25,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 1320 transitions, 21141 flow, removed 74 selfloop flow, removed 5 redundant places. [2023-08-24 09:43:25,147 INFO L231 Difference]: Finished difference. Result has 261 places, 1119 transitions, 18291 flow [2023-08-24 09:43:25,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=14417, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=438, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=18291, PETRI_PLACES=261, PETRI_TRANSITIONS=1119} [2023-08-24 09:43:25,148 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 231 predicate places. [2023-08-24 09:43:25,148 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 1119 transitions, 18291 flow [2023-08-24 09:43:25,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 73.8529411764706) internal successors, (2511), 34 states have internal predecessors, (2511), 0 states have call successors, (0), 0 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 09:43:25,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:43:25,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:43:25,153 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 09:43:25,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:25,349 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 09:43:25,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:43:25,349 INFO L85 PathProgramCache]: Analyzing trace with hash 124083054, now seen corresponding path program 7 times [2023-08-24 09:43:25,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:43:25,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712460526] [2023-08-24 09:43:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:43:25,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:43:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:43:26,298 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 09:43:26,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:43:26,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712460526] [2023-08-24 09:43:26,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712460526] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:43:26,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370443817] [2023-08-24 09:43:26,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:43:26,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:26,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:43:26,300 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 09:43:26,302 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 09:43:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:43:26,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 09:43:26,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:43:26,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:43:26,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:43:26,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:43:26,736 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 14 treesize of output 16 [2023-08-24 09:43:26,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:43:26,853 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 14 treesize of output 16 [2023-08-24 09:43:27,080 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:43:27,082 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:43:27,082 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-24 09:43:27,155 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 09:43:27,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:43:27,753 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:43:27,754 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 60 treesize of output 49 [2023-08-24 09:43:27,768 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:43:27,769 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 490 treesize of output 450 [2023-08-24 09:43:27,779 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 216 treesize of output 192 [2023-08-24 09:43:27,787 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 192 treesize of output 180 [2023-08-24 09:43:27,808 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:43:27,808 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 91 [2023-08-24 09:43:31,355 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-24 09:43:31,485 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 09:43:31,622 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-24 09:43:31,754 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 09:43:31,863 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 09:43:32,035 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 09:43:32,430 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 09:43:35,503 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 09:43:35,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370443817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:43:35,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:43:35,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-08-24 09:43:35,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606359685] [2023-08-24 09:43:35,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:43:35,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 09:43:35,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:43:35,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 09:43:35,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=693, Unknown=8, NotChecked=0, Total=812 [2023-08-24 09:43:35,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 294 [2023-08-24 09:43:35,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 1119 transitions, 18291 flow. Second operand has 29 states, 29 states have (on average 78.10344827586206) internal successors, (2265), 29 states have internal predecessors, (2265), 0 states have call successors, (0), 0 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 09:43:35,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:43:35,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 294 [2023-08-24 09:43:35,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:43:39,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:43:41,713 INFO L124 PetriNetUnfolderBase]: 7021/10394 cut-off events. [2023-08-24 09:43:41,713 INFO L125 PetriNetUnfolderBase]: For 137944/138142 co-relation queries the response was YES. [2023-08-24 09:43:41,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84620 conditions, 10394 events. 7021/10394 cut-off events. For 137944/138142 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 59798 event pairs, 1122 based on Foata normal form. 147/10492 useless extension candidates. Maximal degree in co-relation 83980. Up to 8022 conditions per place. [2023-08-24 09:43:41,836 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 908 selfloop transitions, 413 changer transitions 9/1375 dead transitions. [2023-08-24 09:43:41,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1375 transitions, 24518 flow [2023-08-24 09:43:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:43:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:43:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1128 transitions. [2023-08-24 09:43:41,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29513343799058084 [2023-08-24 09:43:41,839 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1128 transitions. [2023-08-24 09:43:41,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1128 transitions. [2023-08-24 09:43:41,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:43:41,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1128 transitions. [2023-08-24 09:43:41,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 86.76923076923077) internal successors, (1128), 13 states have internal predecessors, (1128), 0 states have call successors, (0), 0 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 09:43:41,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:43:41,844 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:43:41,845 INFO L175 Difference]: Start difference. First operand has 261 places, 1119 transitions, 18291 flow. Second operand 13 states and 1128 transitions. [2023-08-24 09:43:41,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1375 transitions, 24518 flow [2023-08-24 09:43:42,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1375 transitions, 23737 flow, removed 307 selfloop flow, removed 4 redundant places. [2023-08-24 09:43:42,972 INFO L231 Difference]: Finished difference. Result has 274 places, 1189 transitions, 20053 flow [2023-08-24 09:43:42,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=17622, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=20053, PETRI_PLACES=274, PETRI_TRANSITIONS=1189} [2023-08-24 09:43:42,973 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2023-08-24 09:43:42,973 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 1189 transitions, 20053 flow [2023-08-24 09:43:42,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 78.10344827586206) internal successors, (2265), 29 states have internal predecessors, (2265), 0 states have call successors, (0), 0 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 09:43:42,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:43:42,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:43:42,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 09:43:43,174 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,SelfDestructingSolverStorable23 [2023-08-24 09:43:43,174 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 09:43:43,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:43:43,174 INFO L85 PathProgramCache]: Analyzing trace with hash 677924830, now seen corresponding path program 7 times [2023-08-24 09:43:43,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:43:43,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364604467] [2023-08-24 09:43:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:43:43,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:43:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:43:43,807 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 09:43:43,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:43:43,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364604467] [2023-08-24 09:43:43,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364604467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:43:43,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62786944] [2023-08-24 09:43:43,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:43:43,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:43,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:43:43,824 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:43:43,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 09:43:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:43:43,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 09:43:43,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:43:43,977 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:43:44,019 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:43:44,072 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:43:44,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:43:44,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:43:44,249 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 09:43:44,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:43:44,480 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 09:43:44,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62786944] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:43:44,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:43:44,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 5] total 20 [2023-08-24 09:43:44,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508564542] [2023-08-24 09:43:44,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:43:44,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:43:44,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:43:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:43:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=352, Unknown=3, NotChecked=0, Total=462 [2023-08-24 09:43:44,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:43:44,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 1189 transitions, 20053 flow. Second operand has 22 states, 22 states have (on average 90.81818181818181) internal successors, (1998), 22 states have internal predecessors, (1998), 0 states have call successors, (0), 0 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 09:43:44,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:43:44,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:43:44,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:43:47,377 INFO L124 PetriNetUnfolderBase]: 6827/10087 cut-off events. [2023-08-24 09:43:47,378 INFO L125 PetriNetUnfolderBase]: For 155171/156143 co-relation queries the response was YES. [2023-08-24 09:43:47,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86404 conditions, 10087 events. 6827/10087 cut-off events. For 155171/156143 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 59248 event pairs, 1154 based on Foata normal form. 655/10467 useless extension candidates. Maximal degree in co-relation 85726. Up to 9235 conditions per place. [2023-08-24 09:43:47,479 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 1018 selfloop transitions, 197 changer transitions 1/1250 dead transitions. [2023-08-24 09:43:47,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1250 transitions, 23323 flow [2023-08-24 09:43:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:43:47,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:43:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 781 transitions. [2023-08-24 09:43:47,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3320578231292517 [2023-08-24 09:43:47,481 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 781 transitions. [2023-08-24 09:43:47,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 781 transitions. [2023-08-24 09:43:47,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:43:47,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 781 transitions. [2023-08-24 09:43:47,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 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 09:43:47,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:43:47,484 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:43:47,484 INFO L175 Difference]: Start difference. First operand has 274 places, 1189 transitions, 20053 flow. Second operand 8 states and 781 transitions. [2023-08-24 09:43:47,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1250 transitions, 23323 flow [2023-08-24 09:43:48,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1250 transitions, 22963 flow, removed 86 selfloop flow, removed 6 redundant places. [2023-08-24 09:43:48,412 INFO L231 Difference]: Finished difference. Result has 277 places, 1203 transitions, 20508 flow [2023-08-24 09:43:48,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=19693, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=992, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20508, PETRI_PLACES=277, PETRI_TRANSITIONS=1203} [2023-08-24 09:43:48,413 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 247 predicate places. [2023-08-24 09:43:48,413 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 1203 transitions, 20508 flow [2023-08-24 09:43:48,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 90.81818181818181) internal successors, (1998), 22 states have internal predecessors, (1998), 0 states have call successors, (0), 0 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 09:43:48,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:43:48,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:43:48,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 09:43:48,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 09:43:48,620 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 09:43:48,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:43:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash -469285916, now seen corresponding path program 8 times [2023-08-24 09:43:48,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:43:48,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024811578] [2023-08-24 09:43:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:43:48,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:43:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:43:48,952 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 09:43:48,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:43:48,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024811578] [2023-08-24 09:43:48,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024811578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:43:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222695720] [2023-08-24 09:43:48,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:43:48,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:48,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:43:48,954 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:43:48,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 09:43:49,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:43:49,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:43:49,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 09:43:49,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:43:49,155 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:43:49,213 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 09:43:49,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:43:49,291 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:43:49,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-08-24 09:43:49,615 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 09:43:49,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222695720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:43:49,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:43:49,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 11 [2023-08-24 09:43:49,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663995017] [2023-08-24 09:43:49,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:43:49,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 09:43:49,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:43:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 09:43:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-24 09:43:49,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 294 [2023-08-24 09:43:49,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 1203 transitions, 20508 flow. Second operand has 13 states, 13 states have (on average 108.07692307692308) internal successors, (1405), 13 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 09:43:49,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:43:49,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 294 [2023-08-24 09:43:49,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:43:52,313 INFO L124 PetriNetUnfolderBase]: 6997/10338 cut-off events. [2023-08-24 09:43:52,313 INFO L125 PetriNetUnfolderBase]: For 163255/164302 co-relation queries the response was YES. [2023-08-24 09:43:52,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89034 conditions, 10338 events. 6997/10338 cut-off events. For 163255/164302 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 60945 event pairs, 1048 based on Foata normal form. 714/10793 useless extension candidates. Maximal degree in co-relation 88677. Up to 9492 conditions per place. [2023-08-24 09:43:52,415 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1048 selfloop transitions, 173 changer transitions 1/1256 dead transitions. [2023-08-24 09:43:52,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1256 transitions, 23645 flow [2023-08-24 09:43:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:43:52,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:43:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 802 transitions. [2023-08-24 09:43:52,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38969873663751214 [2023-08-24 09:43:52,417 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 802 transitions. [2023-08-24 09:43:52,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 802 transitions. [2023-08-24 09:43:52,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:43:52,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 802 transitions. [2023-08-24 09:43:52,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.57142857142857) internal successors, (802), 7 states have internal predecessors, (802), 0 states have call successors, (0), 0 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 09:43:52,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:43:52,420 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:43:52,420 INFO L175 Difference]: Start difference. First operand has 277 places, 1203 transitions, 20508 flow. Second operand 7 states and 802 transitions. [2023-08-24 09:43:52,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1256 transitions, 23645 flow [2023-08-24 09:43:53,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 1256 transitions, 23077 flow, removed 117 selfloop flow, removed 5 redundant places. [2023-08-24 09:43:53,554 INFO L231 Difference]: Finished difference. Result has 281 places, 1219 transitions, 20654 flow [2023-08-24 09:43:53,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=19940, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1034, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20654, PETRI_PLACES=281, PETRI_TRANSITIONS=1219} [2023-08-24 09:43:53,555 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2023-08-24 09:43:53,555 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 1219 transitions, 20654 flow [2023-08-24 09:43:53,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 108.07692307692308) internal successors, (1405), 13 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 09:43:53,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:43:53,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:43:53,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 09:43:53,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 09:43:53,757 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 09:43:53,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:43:53,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1943276834, now seen corresponding path program 9 times [2023-08-24 09:43:53,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:43:53,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964848719] [2023-08-24 09:43:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:43:53,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:43:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:43:54,320 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 09:43:54,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:43:54,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964848719] [2023-08-24 09:43:54,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964848719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:43:54,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799462076] [2023-08-24 09:43:54,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:43:54,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:54,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:43:54,321 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:43:54,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 09:43:54,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:43:54,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:43:54,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 09:43:54,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:43:54,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:43:54,610 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 09:43:54,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:43:54,669 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:43:54,669 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-08-24 09:43:54,958 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 09:43:54,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799462076] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:43:54,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:43:54,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 15 [2023-08-24 09:43:54,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787050956] [2023-08-24 09:43:54,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:43:54,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:43:54,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:43:54,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:43:54,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:43:54,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:43:54,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 1219 transitions, 20654 flow. Second operand has 17 states, 17 states have (on average 91.52941176470588) internal successors, (1556), 17 states have internal predecessors, (1556), 0 states have call successors, (0), 0 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 09:43:54,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:43:54,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:43:54,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:43:57,756 INFO L124 PetriNetUnfolderBase]: 7073/10455 cut-off events. [2023-08-24 09:43:57,757 INFO L125 PetriNetUnfolderBase]: For 166940/168043 co-relation queries the response was YES. [2023-08-24 09:43:57,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89765 conditions, 10455 events. 7073/10455 cut-off events. For 166940/168043 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 61901 event pairs, 1218 based on Foata normal form. 700/10868 useless extension candidates. Maximal degree in co-relation 89406. Up to 9765 conditions per place. [2023-08-24 09:43:57,861 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 1071 selfloop transitions, 155 changer transitions 1/1261 dead transitions. [2023-08-24 09:43:57,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1261 transitions, 23684 flow [2023-08-24 09:43:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:43:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:43:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 778 transitions. [2023-08-24 09:43:57,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307823129251701 [2023-08-24 09:43:57,863 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 778 transitions. [2023-08-24 09:43:57,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 778 transitions. [2023-08-24 09:43:57,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:43:57,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 778 transitions. [2023-08-24 09:43:57,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.25) internal successors, (778), 8 states have internal predecessors, (778), 0 states have call successors, (0), 0 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 09:43:57,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:43:57,866 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:43:57,866 INFO L175 Difference]: Start difference. First operand has 281 places, 1219 transitions, 20654 flow. Second operand 8 states and 778 transitions. [2023-08-24 09:43:57,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1261 transitions, 23684 flow [2023-08-24 09:43:59,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 1261 transitions, 23379 flow, removed 73 selfloop flow, removed 2 redundant places. [2023-08-24 09:43:59,090 INFO L231 Difference]: Finished difference. Result has 288 places, 1225 transitions, 20852 flow [2023-08-24 09:43:59,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=20361, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1064, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20852, PETRI_PLACES=288, PETRI_TRANSITIONS=1225} [2023-08-24 09:43:59,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2023-08-24 09:43:59,091 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 1225 transitions, 20852 flow [2023-08-24 09:43:59,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 91.52941176470588) internal successors, (1556), 17 states have internal predecessors, (1556), 0 states have call successors, (0), 0 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 09:43:59,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:43:59,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:43:59,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 09:43:59,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:59,292 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 09:43:59,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:43:59,293 INFO L85 PathProgramCache]: Analyzing trace with hash -369171528, now seen corresponding path program 8 times [2023-08-24 09:43:59,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:43:59,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956964277] [2023-08-24 09:43:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:43:59,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:43:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:43:59,882 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 09:43:59,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:43:59,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956964277] [2023-08-24 09:43:59,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956964277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:43:59,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897719021] [2023-08-24 09:43:59,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:43:59,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:43:59,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:43:59,885 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:43:59,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 09:44:00,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:44:00,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:44:00,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 09:44:00,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:44:00,311 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:44:00,313 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:44:00,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-24 09:44:00,355 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 09:44:00,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:44:00,452 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:44:00,452 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-08-24 09:44:00,860 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 09:44:00,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897719021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:44:00,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:44:00,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-08-24 09:44:00,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729528577] [2023-08-24 09:44:00,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:44:00,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 09:44:00,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:44:00,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 09:44:00,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2023-08-24 09:44:00,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 09:44:00,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 1225 transitions, 20852 flow. Second operand has 27 states, 27 states have (on average 84.55555555555556) internal successors, (2283), 27 states have internal predecessors, (2283), 0 states have call successors, (0), 0 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 09:44:00,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:44:00,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 09:44:00,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:44:04,728 INFO L124 PetriNetUnfolderBase]: 7647/11318 cut-off events. [2023-08-24 09:44:04,728 INFO L125 PetriNetUnfolderBase]: For 155750/155750 co-relation queries the response was YES. [2023-08-24 09:44:04,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93828 conditions, 11318 events. 7647/11318 cut-off events. For 155750/155750 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 65118 event pairs, 1405 based on Foata normal form. 2/11306 useless extension candidates. Maximal degree in co-relation 93464. Up to 10276 conditions per place. [2023-08-24 09:44:04,830 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 1087 selfloop transitions, 247 changer transitions 5/1339 dead transitions. [2023-08-24 09:44:04,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 1339 transitions, 24978 flow [2023-08-24 09:44:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 09:44:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 09:44:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1525 transitions. [2023-08-24 09:44:04,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051220488195278 [2023-08-24 09:44:04,833 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1525 transitions. [2023-08-24 09:44:04,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1525 transitions. [2023-08-24 09:44:04,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:44:04,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1525 transitions. [2023-08-24 09:44:04,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 89.70588235294117) internal successors, (1525), 17 states have internal predecessors, (1525), 0 states have call successors, (0), 0 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 09:44:04,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:44:04,839 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:44:04,839 INFO L175 Difference]: Start difference. First operand has 288 places, 1225 transitions, 20852 flow. Second operand 17 states and 1525 transitions. [2023-08-24 09:44:04,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 1339 transitions, 24978 flow [2023-08-24 09:44:06,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1339 transitions, 24578 flow, removed 52 selfloop flow, removed 5 redundant places. [2023-08-24 09:44:06,047 INFO L231 Difference]: Finished difference. Result has 304 places, 1253 transitions, 21604 flow [2023-08-24 09:44:06,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=20460, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=985, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=21604, PETRI_PLACES=304, PETRI_TRANSITIONS=1253} [2023-08-24 09:44:06,048 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 274 predicate places. [2023-08-24 09:44:06,048 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 1253 transitions, 21604 flow [2023-08-24 09:44:06,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.55555555555556) internal successors, (2283), 27 states have internal predecessors, (2283), 0 states have call successors, (0), 0 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 09:44:06,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:44:06,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:44:06,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 09:44:06,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 09:44:06,253 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 09:44:06,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:44:06,253 INFO L85 PathProgramCache]: Analyzing trace with hash -818294988, now seen corresponding path program 9 times [2023-08-24 09:44:06,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:44:06,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998319336] [2023-08-24 09:44:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:44:06,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:44:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:44:06,804 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 09:44:06,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:44:06,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998319336] [2023-08-24 09:44:06,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998319336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:44:06,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985391805] [2023-08-24 09:44:06,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:44:06,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:44:06,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:44:06,805 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:44:06,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 09:44:06,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:44:06,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:44:06,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 09:44:06,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:44:07,214 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:44:07,216 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:44:07,217 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-24 09:44:07,253 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 09:44:07,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:44:07,346 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:44:07,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-08-24 09:44:07,749 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 09:44:07,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985391805] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:44:07,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:44:07,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-08-24 09:44:07,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822651026] [2023-08-24 09:44:07,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:44:07,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 09:44:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:44:07,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 09:44:07,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2023-08-24 09:44:07,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 09:44:07,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 1253 transitions, 21604 flow. Second operand has 27 states, 27 states have (on average 84.55555555555556) internal successors, (2283), 27 states have internal predecessors, (2283), 0 states have call successors, (0), 0 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 09:44:07,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:44:07,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 09:44:07,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:44:11,798 INFO L124 PetriNetUnfolderBase]: 7697/11405 cut-off events. [2023-08-24 09:44:11,798 INFO L125 PetriNetUnfolderBase]: For 155792/155792 co-relation queries the response was YES. [2023-08-24 09:44:11,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94823 conditions, 11405 events. 7697/11405 cut-off events. For 155792/155792 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 65899 event pairs, 1421 based on Foata normal form. 1/11392 useless extension candidates. Maximal degree in co-relation 94452. Up to 10479 conditions per place. [2023-08-24 09:44:11,897 INFO L140 encePairwiseOnDemand]: 281/294 looper letters, 1115 selfloop transitions, 231 changer transitions 2/1348 dead transitions. [2023-08-24 09:44:11,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1348 transitions, 25573 flow [2023-08-24 09:44:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 09:44:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 09:44:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1525 transitions. [2023-08-24 09:44:11,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051220488195278 [2023-08-24 09:44:11,899 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1525 transitions. [2023-08-24 09:44:11,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1525 transitions. [2023-08-24 09:44:11,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:44:11,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1525 transitions. [2023-08-24 09:44:11,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 89.70588235294117) internal successors, (1525), 17 states have internal predecessors, (1525), 0 states have call successors, (0), 0 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 09:44:11,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:44:11,904 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:44:11,904 INFO L175 Difference]: Start difference. First operand has 304 places, 1253 transitions, 21604 flow. Second operand 17 states and 1525 transitions. [2023-08-24 09:44:11,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1348 transitions, 25573 flow [2023-08-24 09:44:13,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1348 transitions, 25017 flow, removed 84 selfloop flow, removed 9 redundant places. [2023-08-24 09:44:13,101 INFO L231 Difference]: Finished difference. Result has 315 places, 1276 transitions, 22131 flow [2023-08-24 09:44:13,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=21056, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=22131, PETRI_PLACES=315, PETRI_TRANSITIONS=1276} [2023-08-24 09:44:13,102 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 285 predicate places. [2023-08-24 09:44:13,102 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 1276 transitions, 22131 flow [2023-08-24 09:44:13,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.55555555555556) internal successors, (2283), 27 states have internal predecessors, (2283), 0 states have call successors, (0), 0 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 09:44:13,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:44:13,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:44:13,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 09:44:13,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 09:44:13,305 INFO L420 AbstractCegarLoop]: === Iteration 30 === 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 09:44:13,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:44:13,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1858762800, now seen corresponding path program 10 times [2023-08-24 09:44:13,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:44:13,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809240701] [2023-08-24 09:44:13,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:44:13,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:44:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:44:13,742 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 09:44:13,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:44:13,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809240701] [2023-08-24 09:44:13,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809240701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:44:13,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984898639] [2023-08-24 09:44:13,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:44:13,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:44:13,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:44:13,745 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:44:13,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 09:44:13,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:44:13,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:44:13,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 09:44:13,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:44:13,895 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:44:13,943 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:44:13,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:44:14,019 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:44:14,262 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:44:14,264 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:44:14,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-24 09:44:14,301 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 09:44:14,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:44:14,638 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 09:44:14,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984898639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:44:14,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:44:14,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 7] total 27 [2023-08-24 09:44:14,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814623101] [2023-08-24 09:44:14,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:44:14,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 09:44:14,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:44:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 09:44:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2023-08-24 09:44:14,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 09:44:14,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1276 transitions, 22131 flow. Second operand has 29 states, 29 states have (on average 74.37931034482759) internal successors, (2157), 29 states have internal predecessors, (2157), 0 states have call successors, (0), 0 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 09:44:14,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:44:14,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 09:44:14,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:44:20,048 INFO L124 PetriNetUnfolderBase]: 8193/12180 cut-off events. [2023-08-24 09:44:20,048 INFO L125 PetriNetUnfolderBase]: For 169689/169689 co-relation queries the response was YES. [2023-08-24 09:44:20,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102167 conditions, 12180 events. 8193/12180 cut-off events. For 169689/169689 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 71754 event pairs, 1702 based on Foata normal form. 2/12168 useless extension candidates. Maximal degree in co-relation 101780. Up to 11125 conditions per place. [2023-08-24 09:44:20,169 INFO L140 encePairwiseOnDemand]: 281/294 looper letters, 1149 selfloop transitions, 417 changer transitions 13/1579 dead transitions. [2023-08-24 09:44:20,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1579 transitions, 29944 flow [2023-08-24 09:44:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 09:44:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 09:44:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2740 transitions. [2023-08-24 09:44:20,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2662779397473275 [2023-08-24 09:44:20,173 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2740 transitions. [2023-08-24 09:44:20,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2740 transitions. [2023-08-24 09:44:20,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:44:20,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2740 transitions. [2023-08-24 09:44:20,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 78.28571428571429) internal successors, (2740), 35 states have internal predecessors, (2740), 0 states have call successors, (0), 0 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 09:44:20,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 294.0) internal successors, (10584), 36 states have internal predecessors, (10584), 0 states have call successors, (0), 0 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 09:44:20,185 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 294.0) internal successors, (10584), 36 states have internal predecessors, (10584), 0 states have call successors, (0), 0 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 09:44:20,185 INFO L175 Difference]: Start difference. First operand has 315 places, 1276 transitions, 22131 flow. Second operand 35 states and 2740 transitions. [2023-08-24 09:44:20,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1579 transitions, 29944 flow [2023-08-24 09:44:21,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1579 transitions, 29386 flow, removed 158 selfloop flow, removed 9 redundant places. [2023-08-24 09:44:21,596 INFO L231 Difference]: Finished difference. Result has 356 places, 1460 transitions, 26318 flow [2023-08-24 09:44:21,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=21767, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=974, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=26318, PETRI_PLACES=356, PETRI_TRANSITIONS=1460} [2023-08-24 09:44:21,597 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 326 predicate places. [2023-08-24 09:44:21,597 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1460 transitions, 26318 flow [2023-08-24 09:44:21,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 74.37931034482759) internal successors, (2157), 29 states have internal predecessors, (2157), 0 states have call successors, (0), 0 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 09:44:21,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:44:21,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:44:21,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 09:44:21,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:44:21,799 INFO L420 AbstractCegarLoop]: === Iteration 31 === 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 09:44:21,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:44:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1399879980, now seen corresponding path program 11 times [2023-08-24 09:44:21,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:44:21,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62132056] [2023-08-24 09:44:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:44:21,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:44:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:44:22,409 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 09:44:22,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:44:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62132056] [2023-08-24 09:44:22,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62132056] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:44:22,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281475983] [2023-08-24 09:44:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:44:22,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:44:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:44:22,411 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:44:22,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 09:44:22,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:44:22,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:44:22,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 09:44:22,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:44:22,927 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:44:22,978 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 09:44:22,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:44:23,074 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:44:23,075 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-08-24 09:44:23,801 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 09:44:23,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281475983] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:44:23,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:44:23,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-08-24 09:44:23,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567532357] [2023-08-24 09:44:23,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:44:23,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:44:23,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:44:23,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:44:23,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:44:23,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 09:44:23,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1460 transitions, 26318 flow. Second operand has 25 states, 25 states have (on average 84.76) internal successors, (2119), 25 states have internal predecessors, (2119), 0 states have call successors, (0), 0 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 09:44:23,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:44:23,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 09:44:23,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:44:30,834 INFO L124 PetriNetUnfolderBase]: 9389/13958 cut-off events. [2023-08-24 09:44:30,835 INFO L125 PetriNetUnfolderBase]: For 239525/239525 co-relation queries the response was YES. [2023-08-24 09:44:30,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123042 conditions, 13958 events. 9389/13958 cut-off events. For 239525/239525 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 84222 event pairs, 1489 based on Foata normal form. 5/13949 useless extension candidates. Maximal degree in co-relation 122400. Up to 11202 conditions per place. [2023-08-24 09:44:30,977 INFO L140 encePairwiseOnDemand]: 281/294 looper letters, 1229 selfloop transitions, 602 changer transitions 11/1842 dead transitions. [2023-08-24 09:44:30,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1842 transitions, 35796 flow [2023-08-24 09:44:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 09:44:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 09:44:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3872 transitions. [2023-08-24 09:44:30,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.306280651795602 [2023-08-24 09:44:30,982 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3872 transitions. [2023-08-24 09:44:30,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3872 transitions. [2023-08-24 09:44:30,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:44:30,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3872 transitions. [2023-08-24 09:44:30,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 90.04651162790698) internal successors, (3872), 43 states have internal predecessors, (3872), 0 states have call successors, (0), 0 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 09:44:30,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 294.0) internal successors, (12936), 44 states have internal predecessors, (12936), 0 states have call successors, (0), 0 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 09:44:30,997 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 294.0) internal successors, (12936), 44 states have internal predecessors, (12936), 0 states have call successors, (0), 0 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 09:44:30,997 INFO L175 Difference]: Start difference. First operand has 356 places, 1460 transitions, 26318 flow. Second operand 43 states and 3872 transitions. [2023-08-24 09:44:30,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1842 transitions, 35796 flow [2023-08-24 09:44:33,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1842 transitions, 34449 flow, removed 588 selfloop flow, removed 6 redundant places. [2023-08-24 09:44:33,183 INFO L231 Difference]: Finished difference. Result has 412 places, 1631 transitions, 30152 flow [2023-08-24 09:44:33,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=25158, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=30152, PETRI_PLACES=412, PETRI_TRANSITIONS=1631} [2023-08-24 09:44:33,184 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2023-08-24 09:44:33,184 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1631 transitions, 30152 flow [2023-08-24 09:44:33,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.76) internal successors, (2119), 25 states have internal predecessors, (2119), 0 states have call successors, (0), 0 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 09:44:33,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:44:33,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:44:33,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 09:44:33,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:44:33,389 INFO L420 AbstractCegarLoop]: === Iteration 32 === 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 09:44:33,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:44:33,389 INFO L85 PathProgramCache]: Analyzing trace with hash -26686250, now seen corresponding path program 12 times [2023-08-24 09:44:33,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:44:33,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629168963] [2023-08-24 09:44:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:44:33,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:44:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:44:33,841 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 09:44:33,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:44:33,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629168963] [2023-08-24 09:44:33,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629168963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:44:33,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400423653] [2023-08-24 09:44:33,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:44:33,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:44:33,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:44:33,842 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:44:33,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 09:44:33,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:44:33,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:44:33,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 09:44:33,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:44:34,213 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:44:34,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-08-24 09:44:34,285 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 09:44:34,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:44:34,394 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:44:34,394 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-08-24 09:44:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:44:34,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400423653] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:44:34,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:44:34,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 23 [2023-08-24 09:44:34,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985539677] [2023-08-24 09:44:34,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:44:34,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:44:34,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:44:34,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:44:34,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:44:34,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 09:44:34,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1631 transitions, 30152 flow. Second operand has 25 states, 25 states have (on average 84.76) internal successors, (2119), 25 states have internal predecessors, (2119), 0 states have call successors, (0), 0 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 09:44:34,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:44:34,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 09:44:34,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:44:42,010 INFO L124 PetriNetUnfolderBase]: 9808/14651 cut-off events. [2023-08-24 09:44:42,011 INFO L125 PetriNetUnfolderBase]: For 298217/298217 co-relation queries the response was YES. [2023-08-24 09:44:42,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135152 conditions, 14651 events. 9808/14651 cut-off events. For 298217/298217 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 89774 event pairs, 1934 based on Foata normal form. 4/14641 useless extension candidates. Maximal degree in co-relation 134540. Up to 13404 conditions per place. [2023-08-24 09:44:42,200 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 1445 selfloop transitions, 403 changer transitions 10/1858 dead transitions. [2023-08-24 09:44:42,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1858 transitions, 36888 flow [2023-08-24 09:44:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 09:44:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 09:44:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3534 transitions. [2023-08-24 09:44:42,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30051020408163265 [2023-08-24 09:44:42,203 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3534 transitions. [2023-08-24 09:44:42,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3534 transitions. [2023-08-24 09:44:42,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:44:42,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3534 transitions. [2023-08-24 09:44:42,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 88.35) internal successors, (3534), 40 states have internal predecessors, (3534), 0 states have call successors, (0), 0 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 09:44:42,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 294.0) internal successors, (12054), 41 states have internal predecessors, (12054), 0 states have call successors, (0), 0 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 09:44:42,216 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 294.0) internal successors, (12054), 41 states have internal predecessors, (12054), 0 states have call successors, (0), 0 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 09:44:42,217 INFO L175 Difference]: Start difference. First operand has 412 places, 1631 transitions, 30152 flow. Second operand 40 states and 3534 transitions. [2023-08-24 09:44:42,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1858 transitions, 36888 flow [2023-08-24 09:44:45,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 1858 transitions, 35486 flow, removed 582 selfloop flow, removed 13 redundant places. [2023-08-24 09:44:45,193 INFO L231 Difference]: Finished difference. Result has 448 places, 1738 transitions, 31840 flow [2023-08-24 09:44:45,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=28779, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=31840, PETRI_PLACES=448, PETRI_TRANSITIONS=1738} [2023-08-24 09:44:45,195 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 418 predicate places. [2023-08-24 09:44:45,195 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 1738 transitions, 31840 flow [2023-08-24 09:44:45,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.76) internal successors, (2119), 25 states have internal predecessors, (2119), 0 states have call successors, (0), 0 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 09:44:45,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:44:45,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:44:45,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 09:44:45,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:44:45,396 INFO L420 AbstractCegarLoop]: === Iteration 33 === 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 09:44:45,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:44:45,396 INFO L85 PathProgramCache]: Analyzing trace with hash 736861342, now seen corresponding path program 10 times [2023-08-24 09:44:45,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:44:45,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887651357] [2023-08-24 09:44:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:44:45,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:44:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:44:46,002 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 09:44:46,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:44:46,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887651357] [2023-08-24 09:44:46,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887651357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:44:46,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849206472] [2023-08-24 09:44:46,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:44:46,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:44:46,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:44:46,004 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:44:46,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 09:44:46,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:44:46,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:44:46,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 09:44:46,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:44:46,163 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:44:46,212 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:44:46,257 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:44:46,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:44:46,401 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 14 treesize of output 16 [2023-08-24 09:44:46,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:44:46,478 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 09:44:46,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:44:46,543 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1404 (Array Int Int))) (= (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1404) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4))) c_~sum1~0) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0) 4294967296))) is different from false [2023-08-24 09:44:46,554 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1404 (Array Int Int))) (= (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1404) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4))) c_~sum1~0) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork1_~i~1 4)))) 4294967296))) is different from false [2023-08-24 09:44:46,645 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1404 (Array Int Int)) (v_ArrVal_1403 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1403))) (= (mod (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1404) c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296) (mod (+ c_~sum3~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~sum2~0) 4294967296)))) is different from false [2023-08-24 09:44:46,658 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1404 (Array Int Int)) (v_ArrVal_1403 (Array Int Int)) (v_ArrVal_1402 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1402) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1403))) (= (mod (+ c_~sum1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296) (mod (+ c_~sum3~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|) c_~sum2~0) 4294967296)))) is different from false [2023-08-24 09:44:46,667 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:44:46,667 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 59 treesize of output 48 [2023-08-24 09:44:46,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 846 treesize of output 798 [2023-08-24 09:44:46,675 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 192 treesize of output 180 [2023-08-24 09:44:46,678 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 180 treesize of output 172 [2023-08-24 09:44:46,686 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 88 treesize of output 82 [2023-08-24 09:44:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-24 09:44:47,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849206472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:44:47,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:44:47,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-24 09:44:47,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003111294] [2023-08-24 09:44:47,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:44:47,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 09:44:47,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:44:47,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 09:44:47,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=394, Unknown=8, NotChecked=180, Total=702 [2023-08-24 09:44:47,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:44:47,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1738 transitions, 31840 flow. Second operand has 27 states, 27 states have (on average 90.03703703703704) internal successors, (2431), 27 states have internal predecessors, (2431), 0 states have call successors, (0), 0 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 09:44:47,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:44:47,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:44:47,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:44:47,977 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1404 (Array Int Int))) (= (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1404) c_~A~0.base) c_~A~0.offset)) 4294967296))) (<= c_~sum2~0 c_~sum1~0) (= c_~sum3~0 0) (<= c_~sum1~0 c_~sum2~0)) is different from false [2023-08-24 09:44:53,011 INFO L124 PetriNetUnfolderBase]: 9513/14255 cut-off events. [2023-08-24 09:44:53,011 INFO L125 PetriNetUnfolderBase]: For 305183/306061 co-relation queries the response was YES. [2023-08-24 09:44:53,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132353 conditions, 14255 events. 9513/14255 cut-off events. For 305183/306061 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 90329 event pairs, 1523 based on Foata normal form. 669/14607 useless extension candidates. Maximal degree in co-relation 131981. Up to 13300 conditions per place. [2023-08-24 09:44:53,174 INFO L140 encePairwiseOnDemand]: 280/294 looper letters, 1523 selfloop transitions, 229 changer transitions 1/1801 dead transitions. [2023-08-24 09:44:53,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1801 transitions, 36278 flow [2023-08-24 09:44:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:44:53,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:44:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 875 transitions. [2023-08-24 09:44:53,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3306878306878307 [2023-08-24 09:44:53,175 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 875 transitions. [2023-08-24 09:44:53,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 875 transitions. [2023-08-24 09:44:53,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:44:53,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 875 transitions. [2023-08-24 09:44:53,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.22222222222223) internal successors, (875), 9 states have internal predecessors, (875), 0 states have call successors, (0), 0 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 09:44:53,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 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 09:44:53,178 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 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 09:44:53,178 INFO L175 Difference]: Start difference. First operand has 448 places, 1738 transitions, 31840 flow. Second operand 9 states and 875 transitions. [2023-08-24 09:44:53,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1801 transitions, 36278 flow [2023-08-24 09:44:55,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 1801 transitions, 35523 flow, removed 267 selfloop flow, removed 11 redundant places. [2023-08-24 09:44:55,785 INFO L231 Difference]: Finished difference. Result has 448 places, 1766 transitions, 32180 flow [2023-08-24 09:44:55,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=31091, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=32180, PETRI_PLACES=448, PETRI_TRANSITIONS=1766} [2023-08-24 09:44:55,786 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 418 predicate places. [2023-08-24 09:44:55,786 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 1766 transitions, 32180 flow [2023-08-24 09:44:55,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 90.03703703703704) internal successors, (2431), 27 states have internal predecessors, (2431), 0 states have call successors, (0), 0 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 09:44:55,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:44:55,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:44:55,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 09:44:55,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:44:55,987 INFO L420 AbstractCegarLoop]: === Iteration 34 === 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 09:44:55,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:44:55,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1793639880, now seen corresponding path program 11 times [2023-08-24 09:44:55,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:44:55,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934095310] [2023-08-24 09:44:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:44:55,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:44:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:44:56,578 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 09:44:56,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:44:56,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934095310] [2023-08-24 09:44:56,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934095310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:44:56,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799265497] [2023-08-24 09:44:56,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:44:56,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:44:56,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:44:56,580 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:44:56,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 09:44:56,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:44:56,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:44:56,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 09:44:56,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:44:56,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:44:56,919 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 14 treesize of output 16 [2023-08-24 09:44:56,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:44:57,004 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 09:44:57,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:44:57,169 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:44:57,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-08-24 09:44:57,173 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 09:44:57,503 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 09:44:57,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799265497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:44:57,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:44:57,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-08-24 09:44:57,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815819379] [2023-08-24 09:44:57,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:44:57,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:44:57,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:44:57,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:44:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=406, Unknown=5, NotChecked=0, Total=506 [2023-08-24 09:44:57,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:44:57,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1766 transitions, 32180 flow. Second operand has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 09:44:57,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:44:57,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:44:57,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:45:03,504 INFO L124 PetriNetUnfolderBase]: 9608/14398 cut-off events. [2023-08-24 09:45:03,504 INFO L125 PetriNetUnfolderBase]: For 318841/319812 co-relation queries the response was YES. [2023-08-24 09:45:03,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136706 conditions, 14398 events. 9608/14398 cut-off events. For 318841/319812 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 91435 event pairs, 1289 based on Foata normal form. 715/14831 useless extension candidates. Maximal degree in co-relation 136326. Up to 12823 conditions per place. [2023-08-24 09:45:03,670 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1452 selfloop transitions, 313 changer transitions 1/1814 dead transitions. [2023-08-24 09:45:03,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1814 transitions, 36535 flow [2023-08-24 09:45:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:45:03,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:45:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 779 transitions. [2023-08-24 09:45:03,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3312074829931973 [2023-08-24 09:45:03,671 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 779 transitions. [2023-08-24 09:45:03,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 779 transitions. [2023-08-24 09:45:03,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:45:03,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 779 transitions. [2023-08-24 09:45:03,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.375) internal successors, (779), 8 states have internal predecessors, (779), 0 states have call successors, (0), 0 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 09:45:03,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:45:03,673 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:45:03,673 INFO L175 Difference]: Start difference. First operand has 448 places, 1766 transitions, 32180 flow. Second operand 8 states and 779 transitions. [2023-08-24 09:45:03,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1814 transitions, 36535 flow [2023-08-24 09:45:06,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1814 transitions, 36005 flow, removed 153 selfloop flow, removed 4 redundant places. [2023-08-24 09:45:06,446 INFO L231 Difference]: Finished difference. Result has 453 places, 1776 transitions, 32702 flow [2023-08-24 09:45:06,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=31650, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=32702, PETRI_PLACES=453, PETRI_TRANSITIONS=1776} [2023-08-24 09:45:06,447 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 423 predicate places. [2023-08-24 09:45:06,447 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1776 transitions, 32702 flow [2023-08-24 09:45:06,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 09:45:06,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:45:06,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:45:06,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 09:45:06,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-24 09:45:06,653 INFO L420 AbstractCegarLoop]: === Iteration 35 === 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 09:45:06,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:45:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2138418142, now seen corresponding path program 12 times [2023-08-24 09:45:06,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:45:06,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906756663] [2023-08-24 09:45:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:45:06,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:45:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:45:07,193 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 09:45:07,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:45:07,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906756663] [2023-08-24 09:45:07,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906756663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:45:07,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739486318] [2023-08-24 09:45:07,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:45:07,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:45:07,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:45:07,194 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:45:07,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 09:45:07,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:45:07,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:45:07,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 09:45:07,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:45:07,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:45:07,551 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 14 treesize of output 16 [2023-08-24 09:45:07,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:45:07,636 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 09:45:07,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:45:07,758 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:45:07,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 48 [2023-08-24 09:45:07,764 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 22 treesize of output 16 [2023-08-24 09:45:08,120 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 09:45:08,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739486318] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:45:08,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:45:08,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-08-24 09:45:08,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650841021] [2023-08-24 09:45:08,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:45:08,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:45:08,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:45:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:45:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=393, Unknown=5, NotChecked=0, Total=506 [2023-08-24 09:45:08,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:45:08,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1776 transitions, 32702 flow. Second operand has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 09:45:08,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:45:08,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:45:08,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:45:14,062 INFO L124 PetriNetUnfolderBase]: 9635/14450 cut-off events. [2023-08-24 09:45:14,062 INFO L125 PetriNetUnfolderBase]: For 321889/322854 co-relation queries the response was YES. [2023-08-24 09:45:14,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138192 conditions, 14450 events. 9635/14450 cut-off events. For 321889/322854 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 92117 event pairs, 1567 based on Foata normal form. 689/14816 useless extension candidates. Maximal degree in co-relation 137809. Up to 13325 conditions per place. [2023-08-24 09:45:14,270 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1540 selfloop transitions, 229 changer transitions 1/1818 dead transitions. [2023-08-24 09:45:14,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1818 transitions, 36941 flow [2023-08-24 09:45:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:45:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:45:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 778 transitions. [2023-08-24 09:45:14,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307823129251701 [2023-08-24 09:45:14,271 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 778 transitions. [2023-08-24 09:45:14,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 778 transitions. [2023-08-24 09:45:14,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:45:14,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 778 transitions. [2023-08-24 09:45:14,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.25) internal successors, (778), 8 states have internal predecessors, (778), 0 states have call successors, (0), 0 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 09:45:14,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:45:14,274 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:45:14,274 INFO L175 Difference]: Start difference. First operand has 453 places, 1776 transitions, 32702 flow. Second operand 8 states and 778 transitions. [2023-08-24 09:45:14,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1818 transitions, 36941 flow [2023-08-24 09:45:17,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1818 transitions, 36370 flow, removed 77 selfloop flow, removed 4 redundant places. [2023-08-24 09:45:17,044 INFO L231 Difference]: Finished difference. Result has 457 places, 1780 transitions, 32791 flow [2023-08-24 09:45:17,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=32131, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=32791, PETRI_PLACES=457, PETRI_TRANSITIONS=1780} [2023-08-24 09:45:17,046 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 427 predicate places. [2023-08-24 09:45:17,046 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1780 transitions, 32791 flow [2023-08-24 09:45:17,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 09:45:17,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:45:17,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:45:17,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 09:45:17,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:45:17,247 INFO L420 AbstractCegarLoop]: === Iteration 36 === 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 09:45:17,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:45:17,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2031439576, now seen corresponding path program 13 times [2023-08-24 09:45:17,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:45:17,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795316587] [2023-08-24 09:45:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:45:17,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:45:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:45:17,823 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 09:45:17,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:45:17,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795316587] [2023-08-24 09:45:17,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795316587] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:45:17,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116762410] [2023-08-24 09:45:17,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:45:17,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:45:17,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:45:17,824 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:45:17,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 09:45:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:45:17,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 09:45:17,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:45:17,981 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:45:18,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:45:18,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:45:18,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:45:18,190 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 14 treesize of output 16 [2023-08-24 09:45:18,230 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-24 09:45:18,269 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 09:45:18,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:45:18,342 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1543 (Array Int Int))) (= (mod c_~sum1~0 4294967296) (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1543) c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork1_~i~1 4)))) 4294967296))) is different from false [2023-08-24 09:45:18,449 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1543 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1543) c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296))) is different from false [2023-08-24 09:45:18,464 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1543 (Array Int Int)) (v_ArrVal_1542 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1542))) (= (mod (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1543) c_~A~0.base) c_~A~0.offset)) 4294967296)))) is different from false [2023-08-24 09:45:18,479 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1543 (Array Int Int)) (v_ArrVal_1542 (Array Int Int)) (v_ArrVal_1541 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1541) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1542))) (= (mod (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|) c_~sum1~0) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1543) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296)))) is different from false [2023-08-24 09:45:18,488 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:45:18,488 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 59 treesize of output 48 [2023-08-24 09:45:18,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3414 treesize of output 3222 [2023-08-24 09:45:18,500 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 192 treesize of output 184 [2023-08-24 09:45:18,506 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 89 treesize of output 83 [2023-08-24 09:45:18,512 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 94 treesize of output 82 [2023-08-24 09:45:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-24 09:45:22,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116762410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:45:22,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:45:22,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-24 09:45:22,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499290968] [2023-08-24 09:45:22,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:45:22,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 09:45:22,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:45:22,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 09:45:22,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=402, Unknown=6, NotChecked=180, Total=702 [2023-08-24 09:45:22,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 09:45:22,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1780 transitions, 32791 flow. Second operand has 27 states, 27 states have (on average 90.03703703703704) internal successors, (2431), 27 states have internal predecessors, (2431), 0 states have call successors, (0), 0 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 09:45:22,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:45:22,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 09:45:22,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:45:28,760 INFO L124 PetriNetUnfolderBase]: 9718/14578 cut-off events. [2023-08-24 09:45:28,761 INFO L125 PetriNetUnfolderBase]: For 331020/332003 co-relation queries the response was YES. [2023-08-24 09:45:28,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139383 conditions, 14578 events. 9718/14578 cut-off events. For 331020/332003 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 93079 event pairs, 1609 based on Foata normal form. 719/14987 useless extension candidates. Maximal degree in co-relation 138999. Up to 13394 conditions per place. [2023-08-24 09:45:28,954 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1515 selfloop transitions, 273 changer transitions 1/1837 dead transitions. [2023-08-24 09:45:28,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1837 transitions, 37299 flow [2023-08-24 09:45:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:45:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:45:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 781 transitions. [2023-08-24 09:45:28,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3320578231292517 [2023-08-24 09:45:28,956 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 781 transitions. [2023-08-24 09:45:28,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 781 transitions. [2023-08-24 09:45:28,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:45:28,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 781 transitions. [2023-08-24 09:45:28,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 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 09:45:28,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:45:28,959 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:45:28,959 INFO L175 Difference]: Start difference. First operand has 457 places, 1780 transitions, 32791 flow. Second operand 8 states and 781 transitions. [2023-08-24 09:45:28,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1837 transitions, 37299 flow [2023-08-24 09:45:31,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1837 transitions, 36751 flow, removed 61 selfloop flow, removed 6 redundant places. [2023-08-24 09:45:31,953 INFO L231 Difference]: Finished difference. Result has 460 places, 1791 transitions, 33293 flow [2023-08-24 09:45:31,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=32245, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=33293, PETRI_PLACES=460, PETRI_TRANSITIONS=1791} [2023-08-24 09:45:31,955 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 430 predicate places. [2023-08-24 09:45:31,955 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 1791 transitions, 33293 flow [2023-08-24 09:45:31,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 90.03703703703704) internal successors, (2431), 27 states have internal predecessors, (2431), 0 states have call successors, (0), 0 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 09:45:31,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:45:31,956 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] [2023-08-24 09:45:31,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 09:45:32,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:45:32,162 INFO L420 AbstractCegarLoop]: === Iteration 37 === 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 09:45:32,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:45:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1453327993, now seen corresponding path program 13 times [2023-08-24 09:45:32,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:45:32,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092752236] [2023-08-24 09:45:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:45:32,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:45:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:45:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:45:32,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:45:32,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092752236] [2023-08-24 09:45:32,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092752236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:45:32,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087277248] [2023-08-24 09:45:32,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:45:32,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:45:32,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:45:32,250 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:45:32,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 09:45:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:45:32,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:45:32,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:45:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:45:32,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:45:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:45:32,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087277248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:45:32,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:45:32,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 09:45:32,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258492786] [2023-08-24 09:45:32,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:45:32,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:45:32,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:45:32,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:45:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:45:32,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 294 [2023-08-24 09:45:32,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 1791 transitions, 33293 flow. Second operand has 14 states, 14 states have (on average 117.92857142857143) internal successors, (1651), 14 states have internal predecessors, (1651), 0 states have call successors, (0), 0 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 09:45:32,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:45:32,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 294 [2023-08-24 09:45:32,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:45:38,381 INFO L124 PetriNetUnfolderBase]: 10342/15315 cut-off events. [2023-08-24 09:45:38,381 INFO L125 PetriNetUnfolderBase]: For 430880/432706 co-relation queries the response was YES. [2023-08-24 09:45:38,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150932 conditions, 15315 events. 10342/15315 cut-off events. For 430880/432706 co-relation queries the response was YES. Maximal size of possible extension queue 1079. Compared 97991 event pairs, 2412 based on Foata normal form. 1585/16228 useless extension candidates. Maximal degree in co-relation 150491. Up to 10627 conditions per place. [2023-08-24 09:45:38,610 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 1750 selfloop transitions, 184 changer transitions 1/2034 dead transitions. [2023-08-24 09:45:38,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 2034 transitions, 40483 flow [2023-08-24 09:45:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:45:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:45:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 985 transitions. [2023-08-24 09:45:38,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187925170068027 [2023-08-24 09:45:38,612 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 985 transitions. [2023-08-24 09:45:38,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 985 transitions. [2023-08-24 09:45:38,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:45:38,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 985 transitions. [2023-08-24 09:45:38,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.125) internal successors, (985), 8 states have internal predecessors, (985), 0 states have call successors, (0), 0 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 09:45:38,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:45:38,615 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 09:45:38,615 INFO L175 Difference]: Start difference. First operand has 460 places, 1791 transitions, 33293 flow. Second operand 8 states and 985 transitions. [2023-08-24 09:45:38,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 2034 transitions, 40483 flow [2023-08-24 09:45:41,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 2034 transitions, 39725 flow, removed 176 selfloop flow, removed 5 redundant places. [2023-08-24 09:45:41,945 INFO L231 Difference]: Finished difference. Result has 464 places, 1745 transitions, 32350 flow [2023-08-24 09:45:41,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=30902, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=32350, PETRI_PLACES=464, PETRI_TRANSITIONS=1745} [2023-08-24 09:45:41,946 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 434 predicate places. [2023-08-24 09:45:41,947 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 1745 transitions, 32350 flow [2023-08-24 09:45:41,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 117.92857142857143) internal successors, (1651), 14 states have internal predecessors, (1651), 0 states have call successors, (0), 0 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 09:45:41,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:45:41,947 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] [2023-08-24 09:45:41,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 09:45:42,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 09:45:42,152 INFO L420 AbstractCegarLoop]: === Iteration 38 === 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 09:45:42,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:45:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1575003854, now seen corresponding path program 14 times [2023-08-24 09:45:42,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:45:42,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399185001] [2023-08-24 09:45:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:45:42,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:45:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:45:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:45:42,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:45:42,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399185001] [2023-08-24 09:45:42,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399185001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:45:42,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030111736] [2023-08-24 09:45:42,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:45:42,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:45:42,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:45:42,277 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:45:42,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 09:45:42,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:45:42,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:45:42,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:45:42,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:45:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:45:42,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:45:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:45:42,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030111736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:45:42,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:45:42,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 09:45:42,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493204272] [2023-08-24 09:45:42,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:45:42,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:45:42,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:45:42,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:45:42,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:45:42,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 294 [2023-08-24 09:45:42,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 1745 transitions, 32350 flow. Second operand has 14 states, 14 states have (on average 117.5) internal successors, (1645), 14 states have internal predecessors, (1645), 0 states have call successors, (0), 0 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 09:45:42,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:45:42,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 294 [2023-08-24 09:45:42,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:45:47,882 INFO L124 PetriNetUnfolderBase]: 9085/13842 cut-off events. [2023-08-24 09:45:47,883 INFO L125 PetriNetUnfolderBase]: For 408960/410606 co-relation queries the response was YES. [2023-08-24 09:45:48,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139202 conditions, 13842 events. 9085/13842 cut-off events. For 408960/410606 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 92176 event pairs, 1975 based on Foata normal form. 1604/14854 useless extension candidates. Maximal degree in co-relation 138765. Up to 5959 conditions per place. [2023-08-24 09:45:48,080 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 1427 selfloop transitions, 169 changer transitions 52/1743 dead transitions. [2023-08-24 09:45:48,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1743 transitions, 35987 flow [2023-08-24 09:45:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:45:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:45:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 868 transitions. [2023-08-24 09:45:48,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2023-08-24 09:45:48,082 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 868 transitions. [2023-08-24 09:45:48,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 868 transitions. [2023-08-24 09:45:48,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:45:48,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 868 transitions. [2023-08-24 09:45:48,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 09:45:48,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:45:48,084 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:45:48,084 INFO L175 Difference]: Start difference. First operand has 464 places, 1745 transitions, 32350 flow. Second operand 7 states and 868 transitions. [2023-08-24 09:45:48,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1743 transitions, 35987 flow [2023-08-24 09:45:51,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1743 transitions, 35709 flow, removed 131 selfloop flow, removed 5 redundant places. [2023-08-24 09:45:51,300 INFO L231 Difference]: Finished difference. Result has 459 places, 1501 transitions, 29361 flow [2023-08-24 09:45:51,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=29220, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29361, PETRI_PLACES=459, PETRI_TRANSITIONS=1501} [2023-08-24 09:45:51,302 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 429 predicate places. [2023-08-24 09:45:51,302 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 1501 transitions, 29361 flow [2023-08-24 09:45:51,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 117.5) internal successors, (1645), 14 states have internal predecessors, (1645), 0 states have call successors, (0), 0 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 09:45:51,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:45:51,302 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] [2023-08-24 09:45:51,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 09:45:51,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 09:45:51,503 INFO L420 AbstractCegarLoop]: === Iteration 39 === 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 09:45:51,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:45:51,503 INFO L85 PathProgramCache]: Analyzing trace with hash -442254462, now seen corresponding path program 15 times [2023-08-24 09:45:51,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:45:51,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467581561] [2023-08-24 09:45:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:45:51,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:45:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:45:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:45:51,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:45:51,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467581561] [2023-08-24 09:45:51,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467581561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:45:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28648686] [2023-08-24 09:45:51,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:45:51,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:45:51,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:45:51,688 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:45:51,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 09:45:51,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:45:51,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:45:51,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:45:51,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:45:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:45:51,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:45:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:45:51,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28648686] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:45:51,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:45:51,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-24 09:45:51,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404200558] [2023-08-24 09:45:51,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:45:51,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 09:45:51,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:45:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 09:45:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-24 09:45:51,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 294 [2023-08-24 09:45:51,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 1501 transitions, 29361 flow. Second operand has 15 states, 15 states have (on average 112.6) internal successors, (1689), 15 states have internal predecessors, (1689), 0 states have call successors, (0), 0 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 09:45:51,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:45:51,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 294 [2023-08-24 09:45:51,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:45:56,835 INFO L124 PetriNetUnfolderBase]: 8303/13002 cut-off events. [2023-08-24 09:45:56,836 INFO L125 PetriNetUnfolderBase]: For 340780/341065 co-relation queries the response was YES. [2023-08-24 09:45:56,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128871 conditions, 13002 events. 8303/13002 cut-off events. For 340780/341065 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 87120 event pairs, 2088 based on Foata normal form. 673/13633 useless extension candidates. Maximal degree in co-relation 128409. Up to 5025 conditions per place. [2023-08-24 09:45:56,995 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 1318 selfloop transitions, 253 changer transitions 156/1783 dead transitions. [2023-08-24 09:45:56,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1783 transitions, 37235 flow [2023-08-24 09:45:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:45:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:45:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 838 transitions. [2023-08-24 09:45:56,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4071914480077745 [2023-08-24 09:45:56,996 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 838 transitions. [2023-08-24 09:45:56,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 838 transitions. [2023-08-24 09:45:56,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:45:56,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 838 transitions. [2023-08-24 09:45:56,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.71428571428571) internal successors, (838), 7 states have internal predecessors, (838), 0 states have call successors, (0), 0 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 09:45:56,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:45:56,999 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:45:56,999 INFO L175 Difference]: Start difference. First operand has 459 places, 1501 transitions, 29361 flow. Second operand 7 states and 838 transitions. [2023-08-24 09:45:56,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1783 transitions, 37235 flow [2023-08-24 09:46:00,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1783 transitions, 36382 flow, removed 185 selfloop flow, removed 8 redundant places. [2023-08-24 09:46:00,292 INFO L231 Difference]: Finished difference. Result has 458 places, 1391 transitions, 27436 flow [2023-08-24 09:46:00,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=27967, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=27436, PETRI_PLACES=458, PETRI_TRANSITIONS=1391} [2023-08-24 09:46:00,293 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 428 predicate places. [2023-08-24 09:46:00,293 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1391 transitions, 27436 flow [2023-08-24 09:46:00,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 112.6) internal successors, (1689), 15 states have internal predecessors, (1689), 0 states have call successors, (0), 0 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 09:46:00,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:00,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:46:00,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 09:46:00,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 09:46:00,495 INFO L420 AbstractCegarLoop]: === Iteration 40 === 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 09:46:00,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:46:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1307022612, now seen corresponding path program 1 times [2023-08-24 09:46:00,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:46:00,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326156444] [2023-08-24 09:46:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:00,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:46:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:00,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:46:00,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326156444] [2023-08-24 09:46:00,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326156444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:46:00,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789067395] [2023-08-24 09:46:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:00,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:00,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:46:00,605 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:46:00,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 09:46:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:00,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:46:00,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:46:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:00,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:46:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:00,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789067395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:46:00,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:46:00,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 09:46:00,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550564260] [2023-08-24 09:46:00,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:46:00,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 09:46:00,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:46:00,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 09:46:00,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-08-24 09:46:00,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:46:00,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1391 transitions, 27436 flow. Second operand has 16 states, 16 states have (on average 108.1875) internal successors, (1731), 16 states have internal predecessors, (1731), 0 states have call successors, (0), 0 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 09:46:00,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:46:00,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:46:00,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:46:05,461 INFO L124 PetriNetUnfolderBase]: 7644/12169 cut-off events. [2023-08-24 09:46:05,462 INFO L125 PetriNetUnfolderBase]: For 336480/336704 co-relation queries the response was YES. [2023-08-24 09:46:05,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122297 conditions, 12169 events. 7644/12169 cut-off events. For 336480/336704 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 83307 event pairs, 1642 based on Foata normal form. 372/12510 useless extension candidates. Maximal degree in co-relation 122119. Up to 4417 conditions per place. [2023-08-24 09:46:05,600 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1181 selfloop transitions, 235 changer transitions 149/1615 dead transitions. [2023-08-24 09:46:05,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1615 transitions, 33807 flow [2023-08-24 09:46:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:46:05,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:46:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1158 transitions. [2023-08-24 09:46:05,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39387755102040817 [2023-08-24 09:46:05,602 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1158 transitions. [2023-08-24 09:46:05,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1158 transitions. [2023-08-24 09:46:05,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:46:05,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1158 transitions. [2023-08-24 09:46:05,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 115.8) internal successors, (1158), 10 states have internal predecessors, (1158), 0 states have call successors, (0), 0 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 09:46:05,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 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 09:46:05,606 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 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 09:46:05,606 INFO L175 Difference]: Start difference. First operand has 458 places, 1391 transitions, 27436 flow. Second operand 10 states and 1158 transitions. [2023-08-24 09:46:05,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1615 transitions, 33807 flow [2023-08-24 09:46:08,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1615 transitions, 33607 flow, removed 50 selfloop flow, removed 11 redundant places. [2023-08-24 09:46:08,761 INFO L231 Difference]: Finished difference. Result has 453 places, 1309 transitions, 26514 flow [2023-08-24 09:46:08,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=26729, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=26514, PETRI_PLACES=453, PETRI_TRANSITIONS=1309} [2023-08-24 09:46:08,762 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 423 predicate places. [2023-08-24 09:46:08,762 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1309 transitions, 26514 flow [2023-08-24 09:46:08,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.1875) internal successors, (1731), 16 states have internal predecessors, (1731), 0 states have call successors, (0), 0 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 09:46:08,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:08,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:46:08,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 09:46:08,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 09:46:08,963 INFO L420 AbstractCegarLoop]: === Iteration 41 === 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 09:46:08,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:46:08,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1888191016, now seen corresponding path program 2 times [2023-08-24 09:46:08,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:46:08,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013509767] [2023-08-24 09:46:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:08,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:46:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:09,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:46:09,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013509767] [2023-08-24 09:46:09,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013509767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:46:09,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561614319] [2023-08-24 09:46:09,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:46:09,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:09,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:46:09,076 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:46:09,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 09:46:09,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:46:09,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:46:09,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:46:09,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:46:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:09,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:46:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:09,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561614319] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:46:09,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:46:09,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 09:46:09,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000608237] [2023-08-24 09:46:09,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:46:09,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:46:09,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:46:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:46:09,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:46:09,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:46:09,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1309 transitions, 26514 flow. Second operand has 18 states, 18 states have (on average 108.05555555555556) internal successors, (1945), 18 states have internal predecessors, (1945), 0 states have call successors, (0), 0 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 09:46:09,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:46:09,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:46:09,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:46:13,333 INFO L124 PetriNetUnfolderBase]: 6923/10733 cut-off events. [2023-08-24 09:46:13,333 INFO L125 PetriNetUnfolderBase]: For 324948/325112 co-relation queries the response was YES. [2023-08-24 09:46:13,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112114 conditions, 10733 events. 6923/10733 cut-off events. For 324948/325112 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 68533 event pairs, 1709 based on Foata normal form. 236/10945 useless extension candidates. Maximal degree in co-relation 111937. Up to 4417 conditions per place. [2023-08-24 09:46:13,466 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1171 selfloop transitions, 281 changer transitions 58/1559 dead transitions. [2023-08-24 09:46:13,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1559 transitions, 33205 flow [2023-08-24 09:46:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:46:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:46:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1489 transitions. [2023-08-24 09:46:13,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38958660387231814 [2023-08-24 09:46:13,468 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1489 transitions. [2023-08-24 09:46:13,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1489 transitions. [2023-08-24 09:46:13,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:46:13,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1489 transitions. [2023-08-24 09:46:13,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 114.53846153846153) internal successors, (1489), 13 states have internal predecessors, (1489), 0 states have call successors, (0), 0 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 09:46:13,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:46:13,473 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:46:13,473 INFO L175 Difference]: Start difference. First operand has 453 places, 1309 transitions, 26514 flow. Second operand 13 states and 1489 transitions. [2023-08-24 09:46:13,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1559 transitions, 33205 flow [2023-08-24 09:46:16,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 1559 transitions, 32047 flow, removed 263 selfloop flow, removed 21 redundant places. [2023-08-24 09:46:16,109 INFO L231 Difference]: Finished difference. Result has 438 places, 1310 transitions, 26547 flow [2023-08-24 09:46:16,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=25152, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=26547, PETRI_PLACES=438, PETRI_TRANSITIONS=1310} [2023-08-24 09:46:16,110 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 408 predicate places. [2023-08-24 09:46:16,110 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 1310 transitions, 26547 flow [2023-08-24 09:46:16,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.05555555555556) internal successors, (1945), 18 states have internal predecessors, (1945), 0 states have call successors, (0), 0 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 09:46:16,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:16,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:46:16,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 09:46:16,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:16,311 INFO L420 AbstractCegarLoop]: === Iteration 42 === 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 09:46:16,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:46:16,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1110475596, now seen corresponding path program 3 times [2023-08-24 09:46:16,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:46:16,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894619523] [2023-08-24 09:46:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:16,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:46:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:16,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:46:16,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894619523] [2023-08-24 09:46:16,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894619523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:46:16,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623617058] [2023-08-24 09:46:16,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:46:16,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:16,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:46:16,421 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:46:16,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 09:46:16,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:46:16,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:46:16,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:46:16,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:46:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:16,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:46:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:16,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623617058] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:46:16,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:46:16,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 09:46:16,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217570782] [2023-08-24 09:46:16,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:46:16,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:46:16,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:46:16,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:46:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:46:16,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:46:16,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 1310 transitions, 26547 flow. Second operand has 17 states, 17 states have (on average 108.29411764705883) internal successors, (1841), 17 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 09:46:16,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:46:16,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:46:16,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:46:20,409 INFO L124 PetriNetUnfolderBase]: 6648/10418 cut-off events. [2023-08-24 09:46:20,409 INFO L125 PetriNetUnfolderBase]: For 271689/271823 co-relation queries the response was YES. [2023-08-24 09:46:20,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106062 conditions, 10418 events. 6648/10418 cut-off events. For 271689/271823 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 67337 event pairs, 1730 based on Foata normal form. 230/10624 useless extension candidates. Maximal degree in co-relation 105896. Up to 4417 conditions per place. [2023-08-24 09:46:20,532 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1147 selfloop transitions, 200 changer transitions 74/1470 dead transitions. [2023-08-24 09:46:20,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1470 transitions, 31426 flow [2023-08-24 09:46:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:46:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:46:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1149 transitions. [2023-08-24 09:46:20,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39081632653061227 [2023-08-24 09:46:20,533 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1149 transitions. [2023-08-24 09:46:20,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1149 transitions. [2023-08-24 09:46:20,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:46:20,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1149 transitions. [2023-08-24 09:46:20,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 114.9) internal successors, (1149), 10 states have internal predecessors, (1149), 0 states have call successors, (0), 0 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 09:46:20,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 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 09:46:20,536 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 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 09:46:20,536 INFO L175 Difference]: Start difference. First operand has 438 places, 1310 transitions, 26547 flow. Second operand 10 states and 1149 transitions. [2023-08-24 09:46:20,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1470 transitions, 31426 flow [2023-08-24 09:46:22,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1470 transitions, 30776 flow, removed 99 selfloop flow, removed 11 redundant places. [2023-08-24 09:46:22,959 INFO L231 Difference]: Finished difference. Result has 433 places, 1238 transitions, 24639 flow [2023-08-24 09:46:22,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=25080, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1068, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24639, PETRI_PLACES=433, PETRI_TRANSITIONS=1238} [2023-08-24 09:46:22,960 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 403 predicate places. [2023-08-24 09:46:22,961 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1238 transitions, 24639 flow [2023-08-24 09:46:22,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 108.29411764705883) internal successors, (1841), 17 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 09:46:22,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:22,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:46:22,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 09:46:23,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-24 09:46:23,166 INFO L420 AbstractCegarLoop]: === Iteration 43 === 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 09:46:23,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:46:23,167 INFO L85 PathProgramCache]: Analyzing trace with hash -714030286, now seen corresponding path program 4 times [2023-08-24 09:46:23,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:46:23,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41199145] [2023-08-24 09:46:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:23,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:46:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:23,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:46:23,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41199145] [2023-08-24 09:46:23,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41199145] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:46:23,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502981190] [2023-08-24 09:46:23,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:46:23,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:23,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:46:23,265 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:46:23,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 09:46:23,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:46:23,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:46:23,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 09:46:23,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:46:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:23,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:46:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:23,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502981190] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:46:23,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:46:23,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2023-08-24 09:46:23,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593010662] [2023-08-24 09:46:23,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:46:23,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:46:23,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:46:23,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:46:23,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:46:23,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 09:46:23,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1238 transitions, 24639 flow. Second operand has 14 states, 14 states have (on average 104.14285714285714) internal successors, (1458), 14 states have internal predecessors, (1458), 0 states have call successors, (0), 0 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 09:46:23,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:46:23,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 09:46:23,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:46:27,592 INFO L124 PetriNetUnfolderBase]: 6851/10622 cut-off events. [2023-08-24 09:46:27,592 INFO L125 PetriNetUnfolderBase]: For 264461/264461 co-relation queries the response was YES. [2023-08-24 09:46:27,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106270 conditions, 10622 events. 6851/10622 cut-off events. For 264461/264461 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 67443 event pairs, 693 based on Foata normal form. 224/10846 useless extension candidates. Maximal degree in co-relation 106108. Up to 3196 conditions per place. [2023-08-24 09:46:27,734 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 953 selfloop transitions, 525 changer transitions 60/1538 dead transitions. [2023-08-24 09:46:27,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 1538 transitions, 32185 flow [2023-08-24 09:46:27,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 09:46:27,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 09:46:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2613 transitions. [2023-08-24 09:46:27,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3703231292517007 [2023-08-24 09:46:27,737 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2613 transitions. [2023-08-24 09:46:27,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2613 transitions. [2023-08-24 09:46:27,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:46:27,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2613 transitions. [2023-08-24 09:46:27,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 108.875) internal successors, (2613), 24 states have internal predecessors, (2613), 0 states have call successors, (0), 0 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 09:46:27,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 294.0) internal successors, (7350), 25 states have internal predecessors, (7350), 0 states have call successors, (0), 0 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 09:46:27,745 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 294.0) internal successors, (7350), 25 states have internal predecessors, (7350), 0 states have call successors, (0), 0 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 09:46:27,745 INFO L175 Difference]: Start difference. First operand has 433 places, 1238 transitions, 24639 flow. Second operand 24 states and 2613 transitions. [2023-08-24 09:46:27,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 1538 transitions, 32185 flow [2023-08-24 09:46:30,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1538 transitions, 31487 flow, removed 111 selfloop flow, removed 9 redundant places. [2023-08-24 09:46:30,051 INFO L231 Difference]: Finished difference. Result has 454 places, 1276 transitions, 26444 flow [2023-08-24 09:46:30,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=23886, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=26444, PETRI_PLACES=454, PETRI_TRANSITIONS=1276} [2023-08-24 09:46:30,053 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 424 predicate places. [2023-08-24 09:46:30,053 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1276 transitions, 26444 flow [2023-08-24 09:46:30,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 104.14285714285714) internal successors, (1458), 14 states have internal predecessors, (1458), 0 states have call successors, (0), 0 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 09:46:30,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:30,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:46:30,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-08-24 09:46:30,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-24 09:46:30,254 INFO L420 AbstractCegarLoop]: === Iteration 44 === 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 09:46:30,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:46:30,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1910026426, now seen corresponding path program 5 times [2023-08-24 09:46:30,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:46:30,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624754349] [2023-08-24 09:46:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:30,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:46:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:30,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:46:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624754349] [2023-08-24 09:46:30,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624754349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:46:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404866643] [2023-08-24 09:46:30,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:46:30,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:30,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:46:30,330 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:46:30,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 09:46:30,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:46:30,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:46:30,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:46:30,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:46:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:30,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:46:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:30,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404866643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:46:30,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:46:30,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 09:46:30,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453037706] [2023-08-24 09:46:30,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:46:30,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:46:30,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:46:30,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:46:30,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:46:30,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:46:30,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1276 transitions, 26444 flow. Second operand has 17 states, 17 states have (on average 108.29411764705883) internal successors, (1841), 17 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 09:46:30,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:46:30,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:46:30,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:46:34,171 INFO L124 PetriNetUnfolderBase]: 6185/9636 cut-off events. [2023-08-24 09:46:34,171 INFO L125 PetriNetUnfolderBase]: For 259561/259646 co-relation queries the response was YES. [2023-08-24 09:46:34,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100389 conditions, 9636 events. 6185/9636 cut-off events. For 259561/259646 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 60732 event pairs, 1376 based on Foata normal form. 213/9832 useless extension candidates. Maximal degree in co-relation 100219. Up to 4418 conditions per place. [2023-08-24 09:46:34,287 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1128 selfloop transitions, 142 changer transitions 53/1377 dead transitions. [2023-08-24 09:46:34,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1377 transitions, 30485 flow [2023-08-24 09:46:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:46:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:46:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1035 transitions. [2023-08-24 09:46:34,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2023-08-24 09:46:34,288 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1035 transitions. [2023-08-24 09:46:34,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1035 transitions. [2023-08-24 09:46:34,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:46:34,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1035 transitions. [2023-08-24 09:46:34,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 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 09:46:34,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 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 09:46:34,291 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 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 09:46:34,291 INFO L175 Difference]: Start difference. First operand has 454 places, 1276 transitions, 26444 flow. Second operand 9 states and 1035 transitions. [2023-08-24 09:46:34,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1377 transitions, 30485 flow [2023-08-24 09:46:36,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1377 transitions, 29515 flow, removed 202 selfloop flow, removed 10 redundant places. [2023-08-24 09:46:36,588 INFO L231 Difference]: Finished difference. Result has 452 places, 1249 transitions, 25376 flow [2023-08-24 09:46:36,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=25050, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=25376, PETRI_PLACES=452, PETRI_TRANSITIONS=1249} [2023-08-24 09:46:36,589 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 422 predicate places. [2023-08-24 09:46:36,589 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 1249 transitions, 25376 flow [2023-08-24 09:46:36,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 108.29411764705883) internal successors, (1841), 17 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 09:46:36,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:36,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:46:36,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 09:46:36,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-24 09:46:36,790 INFO L420 AbstractCegarLoop]: === Iteration 45 === 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 09:46:36,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:46:36,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1400152444, now seen corresponding path program 6 times [2023-08-24 09:46:36,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:46:36,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020685018] [2023-08-24 09:46:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:36,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:46:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:36,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:46:36,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020685018] [2023-08-24 09:46:36,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020685018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:46:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30714298] [2023-08-24 09:46:36,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:46:36,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:36,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:46:36,889 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:46:36,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-24 09:46:37,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:46:37,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:46:37,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:46:37,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:46:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:37,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:46:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:37,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30714298] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:46:37,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:46:37,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 09:46:37,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389412376] [2023-08-24 09:46:37,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:46:37,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:46:37,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:46:37,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:46:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:46:37,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:46:37,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 1249 transitions, 25376 flow. Second operand has 18 states, 18 states have (on average 108.05555555555556) internal successors, (1945), 18 states have internal predecessors, (1945), 0 states have call successors, (0), 0 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 09:46:37,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:46:37,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:46:37,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:46:40,357 INFO L124 PetriNetUnfolderBase]: 5730/8880 cut-off events. [2023-08-24 09:46:40,357 INFO L125 PetriNetUnfolderBase]: For 219601/219680 co-relation queries the response was YES. [2023-08-24 09:46:40,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90590 conditions, 8880 events. 5730/8880 cut-off events. For 219601/219680 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 54630 event pairs, 1188 based on Foata normal form. 218/9081 useless extension candidates. Maximal degree in co-relation 90419. Up to 4418 conditions per place. [2023-08-24 09:46:40,474 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1073 selfloop transitions, 137 changer transitions 32/1294 dead transitions. [2023-08-24 09:46:40,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1294 transitions, 27647 flow [2023-08-24 09:46:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:46:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:46:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1147 transitions. [2023-08-24 09:46:40,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901360544217687 [2023-08-24 09:46:40,476 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1147 transitions. [2023-08-24 09:46:40,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1147 transitions. [2023-08-24 09:46:40,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:46:40,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1147 transitions. [2023-08-24 09:46:40,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 114.7) internal successors, (1147), 10 states have internal predecessors, (1147), 0 states have call successors, (0), 0 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 09:46:40,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 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 09:46:40,478 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 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 09:46:40,478 INFO L175 Difference]: Start difference. First operand has 452 places, 1249 transitions, 25376 flow. Second operand 10 states and 1147 transitions. [2023-08-24 09:46:40,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1294 transitions, 27647 flow [2023-08-24 09:46:42,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1294 transitions, 27153 flow, removed 161 selfloop flow, removed 12 redundant places. [2023-08-24 09:46:42,374 INFO L231 Difference]: Finished difference. Result has 445 places, 1176 transitions, 23703 flow [2023-08-24 09:46:42,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=23226, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1042, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23703, PETRI_PLACES=445, PETRI_TRANSITIONS=1176} [2023-08-24 09:46:42,375 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 415 predicate places. [2023-08-24 09:46:42,375 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1176 transitions, 23703 flow [2023-08-24 09:46:42,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.05555555555556) internal successors, (1945), 18 states have internal predecessors, (1945), 0 states have call successors, (0), 0 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 09:46:42,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:42,375 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] [2023-08-24 09:46:42,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-24 09:46:42,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:42,576 INFO L420 AbstractCegarLoop]: === Iteration 46 === 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 09:46:42,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:46:42,576 INFO L85 PathProgramCache]: Analyzing trace with hash -523952796, now seen corresponding path program 14 times [2023-08-24 09:46:42,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:46:42,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338183448] [2023-08-24 09:46:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:42,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:46:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:46:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338183448] [2023-08-24 09:46:42,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338183448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:46:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570418913] [2023-08-24 09:46:42,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:46:42,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:42,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:46:42,660 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:46:42,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-24 09:46:42,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:46:42,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:46:42,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:46:42,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:46:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:42,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:46:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:46:42,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570418913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:46:42,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:46:42,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 09:46:42,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791390970] [2023-08-24 09:46:42,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:46:42,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:46:42,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:46:42,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:46:42,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:46:42,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 294 [2023-08-24 09:46:42,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1176 transitions, 23703 flow. Second operand has 14 states, 14 states have (on average 113.85714285714286) internal successors, (1594), 14 states have internal predecessors, (1594), 0 states have call successors, (0), 0 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 09:46:42,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:46:42,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 294 [2023-08-24 09:46:42,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:46:45,200 INFO L124 PetriNetUnfolderBase]: 4042/6386 cut-off events. [2023-08-24 09:46:45,201 INFO L125 PetriNetUnfolderBase]: For 161366/161596 co-relation queries the response was YES. [2023-08-24 09:46:45,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67819 conditions, 6386 events. 4042/6386 cut-off events. For 161366/161596 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39203 event pairs, 1017 based on Foata normal form. 524/6866 useless extension candidates. Maximal degree in co-relation 67653. Up to 4326 conditions per place. [2023-08-24 09:46:45,268 INFO L140 encePairwiseOnDemand]: 289/294 looper letters, 637 selfloop transitions, 3 changer transitions 344/1035 dead transitions. [2023-08-24 09:46:45,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1035 transitions, 23144 flow [2023-08-24 09:46:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:46:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:46:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 834 transitions. [2023-08-24 09:46:45,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40524781341107874 [2023-08-24 09:46:45,270 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 834 transitions. [2023-08-24 09:46:45,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 834 transitions. [2023-08-24 09:46:45,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:46:45,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 834 transitions. [2023-08-24 09:46:45,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.14285714285714) internal successors, (834), 7 states have internal predecessors, (834), 0 states have call successors, (0), 0 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 09:46:45,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:46:45,272 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 09:46:45,272 INFO L175 Difference]: Start difference. First operand has 445 places, 1176 transitions, 23703 flow. Second operand 7 states and 834 transitions. [2023-08-24 09:46:45,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1035 transitions, 23144 flow [2023-08-24 09:46:46,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1035 transitions, 22702 flow, removed 42 selfloop flow, removed 20 redundant places. [2023-08-24 09:46:46,385 INFO L231 Difference]: Finished difference. Result has 408 places, 691 transitions, 12306 flow [2023-08-24 09:46:46,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=20683, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1008, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12306, PETRI_PLACES=408, PETRI_TRANSITIONS=691} [2023-08-24 09:46:46,385 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 378 predicate places. [2023-08-24 09:46:46,385 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 691 transitions, 12306 flow [2023-08-24 09:46:46,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 113.85714285714286) internal successors, (1594), 14 states have internal predecessors, (1594), 0 states have call successors, (0), 0 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 09:46:46,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:46,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:46:46,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-08-24 09:46:46,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:46,586 INFO L420 AbstractCegarLoop]: === Iteration 47 === 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 09:46:46,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:46:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash 376001385, now seen corresponding path program 16 times [2023-08-24 09:46:46,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:46:46,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148621939] [2023-08-24 09:46:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:46,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:46:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:46,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:46:46,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148621939] [2023-08-24 09:46:46,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148621939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:46:46,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111529082] [2023-08-24 09:46:46,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:46:46,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:46,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:46:46,706 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:46:46,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-24 09:46:46,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:46:46,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:46:46,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:46:46,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:46:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:46,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:46:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:47,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111529082] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:46:47,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:46:47,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-24 09:46:47,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914332783] [2023-08-24 09:46:47,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:46:47,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:46:47,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:46:47,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:46:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:46:47,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 09:46:47,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 691 transitions, 12306 flow. Second operand has 17 states, 17 states have (on average 103.3529411764706) internal successors, (1757), 17 states have internal predecessors, (1757), 0 states have call successors, (0), 0 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 09:46:47,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:46:47,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 09:46:47,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:46:49,093 INFO L124 PetriNetUnfolderBase]: 3488/5121 cut-off events. [2023-08-24 09:46:49,093 INFO L125 PetriNetUnfolderBase]: For 135400/135400 co-relation queries the response was YES. [2023-08-24 09:46:49,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52244 conditions, 5121 events. 3488/5121 cut-off events. For 135400/135400 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 26091 event pairs, 181 based on Foata normal form. 80/5201 useless extension candidates. Maximal degree in co-relation 52090. Up to 1450 conditions per place. [2023-08-24 09:46:49,152 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 554 selfloop transitions, 460 changer transitions 1/1015 dead transitions. [2023-08-24 09:46:49,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1015 transitions, 19540 flow [2023-08-24 09:46:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 09:46:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 09:46:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2174 transitions. [2023-08-24 09:46:49,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697278911564626 [2023-08-24 09:46:49,154 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2174 transitions. [2023-08-24 09:46:49,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2174 transitions. [2023-08-24 09:46:49,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:46:49,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2174 transitions. [2023-08-24 09:46:49,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 108.7) internal successors, (2174), 20 states have internal predecessors, (2174), 0 states have call successors, (0), 0 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 09:46:49,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 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 09:46:49,160 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 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 09:46:49,160 INFO L175 Difference]: Start difference. First operand has 408 places, 691 transitions, 12306 flow. Second operand 20 states and 2174 transitions. [2023-08-24 09:46:49,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1015 transitions, 19540 flow [2023-08-24 09:46:49,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1015 transitions, 18175 flow, removed 553 selfloop flow, removed 32 redundant places. [2023-08-24 09:46:49,742 INFO L231 Difference]: Finished difference. Result has 336 places, 784 transitions, 14577 flow [2023-08-24 09:46:49,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=11365, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=14577, PETRI_PLACES=336, PETRI_TRANSITIONS=784} [2023-08-24 09:46:49,743 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2023-08-24 09:46:49,743 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 784 transitions, 14577 flow [2023-08-24 09:46:49,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 103.3529411764706) internal successors, (1757), 17 states have internal predecessors, (1757), 0 states have call successors, (0), 0 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 09:46:49,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:49,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:46:49,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-24 09:46:49,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-24 09:46:49,944 INFO L420 AbstractCegarLoop]: === Iteration 48 === 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 09:46:49,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:46:49,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1403881909, now seen corresponding path program 17 times [2023-08-24 09:46:49,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:46:49,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19257486] [2023-08-24 09:46:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:49,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:46:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:50,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:46:50,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19257486] [2023-08-24 09:46:50,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19257486] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:46:50,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225254654] [2023-08-24 09:46:50,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:46:50,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:50,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:46:50,050 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:46:50,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-24 09:46:50,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:46:50,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:46:50,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:46:50,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:46:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:50,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:46:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:50,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225254654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:46:50,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:46:50,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2023-08-24 09:46:50,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938336854] [2023-08-24 09:46:50,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:46:50,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 09:46:50,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:46:50,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 09:46:50,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-24 09:46:50,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 09:46:50,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 784 transitions, 14577 flow. Second operand has 16 states, 16 states have (on average 103.5) internal successors, (1656), 16 states have internal predecessors, (1656), 0 states have call successors, (0), 0 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 09:46:50,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:46:50,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 09:46:50,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:46:52,140 INFO L124 PetriNetUnfolderBase]: 3542/5213 cut-off events. [2023-08-24 09:46:52,141 INFO L125 PetriNetUnfolderBase]: For 121633/121633 co-relation queries the response was YES. [2023-08-24 09:46:52,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52846 conditions, 5213 events. 3542/5213 cut-off events. For 121633/121633 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 26653 event pairs, 261 based on Foata normal form. 38/5251 useless extension candidates. Maximal degree in co-relation 52709. Up to 1559 conditions per place. [2023-08-24 09:46:52,197 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 644 selfloop transitions, 459 changer transitions 1/1104 dead transitions. [2023-08-24 09:46:52,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1104 transitions, 21687 flow [2023-08-24 09:46:52,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 09:46:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 09:46:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2144 transitions. [2023-08-24 09:46:52,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36462585034013606 [2023-08-24 09:46:52,199 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2144 transitions. [2023-08-24 09:46:52,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2144 transitions. [2023-08-24 09:46:52,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:46:52,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2144 transitions. [2023-08-24 09:46:52,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 107.2) internal successors, (2144), 20 states have internal predecessors, (2144), 0 states have call successors, (0), 0 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 09:46:52,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 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 09:46:52,205 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 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 09:46:52,205 INFO L175 Difference]: Start difference. First operand has 336 places, 784 transitions, 14577 flow. Second operand 20 states and 2144 transitions. [2023-08-24 09:46:52,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1104 transitions, 21687 flow [2023-08-24 09:46:52,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1104 transitions, 20710 flow, removed 415 selfloop flow, removed 9 redundant places. [2023-08-24 09:46:52,862 INFO L231 Difference]: Finished difference. Result has 349 places, 852 transitions, 16471 flow [2023-08-24 09:46:52,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=14019, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=16471, PETRI_PLACES=349, PETRI_TRANSITIONS=852} [2023-08-24 09:46:52,863 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2023-08-24 09:46:52,863 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 852 transitions, 16471 flow [2023-08-24 09:46:52,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 103.5) internal successors, (1656), 16 states have internal predecessors, (1656), 0 states have call successors, (0), 0 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 09:46:52,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:52,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:46:52,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-24 09:46:53,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-24 09:46:53,064 INFO L420 AbstractCegarLoop]: === Iteration 49 === 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 09:46:53,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:46:53,064 INFO L85 PathProgramCache]: Analyzing trace with hash -685145619, now seen corresponding path program 18 times [2023-08-24 09:46:53,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:46:53,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872787437] [2023-08-24 09:46:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:53,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:46:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:53,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:46:53,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872787437] [2023-08-24 09:46:53,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872787437] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:46:53,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142095602] [2023-08-24 09:46:53,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:46:53,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:53,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:46:53,160 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:46:53,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-24 09:46:53,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:46:53,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:46:53,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:46:53,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:46:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:53,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:46:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:53,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142095602] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:46:53,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:46:53,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 09:46:53,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16199996] [2023-08-24 09:46:53,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:46:53,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:46:53,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:46:53,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:46:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:46:53,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:46:53,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 852 transitions, 16471 flow. Second operand has 19 states, 19 states have (on average 108.21052631578948) internal successors, (2056), 19 states have internal predecessors, (2056), 0 states have call successors, (0), 0 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 09:46:53,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:46:53,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:46:53,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:46:55,198 INFO L124 PetriNetUnfolderBase]: 3880/5751 cut-off events. [2023-08-24 09:46:55,198 INFO L125 PetriNetUnfolderBase]: For 140125/140169 co-relation queries the response was YES. [2023-08-24 09:46:55,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58191 conditions, 5751 events. 3880/5751 cut-off events. For 140125/140169 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 30397 event pairs, 475 based on Foata normal form. 152/5894 useless extension candidates. Maximal degree in co-relation 58055. Up to 2983 conditions per place. [2023-08-24 09:46:55,257 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 727 selfloop transitions, 512 changer transitions 0/1280 dead transitions. [2023-08-24 09:46:55,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1280 transitions, 25050 flow [2023-08-24 09:46:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 09:46:55,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 09:46:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1700 transitions. [2023-08-24 09:46:55,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854875283446712 [2023-08-24 09:46:55,259 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1700 transitions. [2023-08-24 09:46:55,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1700 transitions. [2023-08-24 09:46:55,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:46:55,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1700 transitions. [2023-08-24 09:46:55,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 113.33333333333333) internal successors, (1700), 15 states have internal predecessors, (1700), 0 states have call successors, (0), 0 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 09:46:55,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 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 09:46:55,264 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 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 09:46:55,264 INFO L175 Difference]: Start difference. First operand has 349 places, 852 transitions, 16471 flow. Second operand 15 states and 1700 transitions. [2023-08-24 09:46:55,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1280 transitions, 25050 flow [2023-08-24 09:46:55,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1280 transitions, 24810 flow, removed 65 selfloop flow, removed 6 redundant places. [2023-08-24 09:46:55,992 INFO L231 Difference]: Finished difference. Result has 357 places, 998 transitions, 20295 flow [2023-08-24 09:46:55,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=15986, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=20295, PETRI_PLACES=357, PETRI_TRANSITIONS=998} [2023-08-24 09:46:55,993 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 327 predicate places. [2023-08-24 09:46:55,993 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 998 transitions, 20295 flow [2023-08-24 09:46:55,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 108.21052631578948) internal successors, (2056), 19 states have internal predecessors, (2056), 0 states have call successors, (0), 0 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 09:46:55,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:55,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:46:55,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-24 09:46:56,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-24 09:46:56,194 INFO L420 AbstractCegarLoop]: === Iteration 50 === 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 09:46:56,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:46:56,195 INFO L85 PathProgramCache]: Analyzing trace with hash -470899831, now seen corresponding path program 19 times [2023-08-24 09:46:56,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:46:56,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378684767] [2023-08-24 09:46:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:46:56,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:46:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:56,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:46:56,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378684767] [2023-08-24 09:46:56,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378684767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:46:56,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875166358] [2023-08-24 09:46:56,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:46:56,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:46:56,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:46:56,289 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:46:56,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-24 09:46:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:46:56,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:46:56,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:46:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:56,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:46:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:46:56,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875166358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:46:56,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:46:56,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 09:46:56,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737022298] [2023-08-24 09:46:56,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:46:56,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:46:56,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:46:56,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:46:56,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:46:56,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:46:56,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 998 transitions, 20295 flow. Second operand has 20 states, 20 states have (on average 108.0) internal successors, (2160), 20 states have internal predecessors, (2160), 0 states have call successors, (0), 0 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 09:46:56,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:46:56,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:46:56,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:46:58,837 INFO L124 PetriNetUnfolderBase]: 4023/6011 cut-off events. [2023-08-24 09:46:58,837 INFO L125 PetriNetUnfolderBase]: For 159644/159698 co-relation queries the response was YES. [2023-08-24 09:46:58,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64188 conditions, 6011 events. 4023/6011 cut-off events. For 159644/159698 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 32513 event pairs, 507 based on Foata normal form. 66/6064 useless extension candidates. Maximal degree in co-relation 64047. Up to 2903 conditions per place. [2023-08-24 09:46:58,901 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 866 selfloop transitions, 435 changer transitions 0/1342 dead transitions. [2023-08-24 09:46:58,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1342 transitions, 28145 flow [2023-08-24 09:46:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 09:46:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 09:46:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1812 transitions. [2023-08-24 09:46:58,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852040816326531 [2023-08-24 09:46:58,903 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1812 transitions. [2023-08-24 09:46:58,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1812 transitions. [2023-08-24 09:46:58,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:46:58,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1812 transitions. [2023-08-24 09:46:58,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 113.25) internal successors, (1812), 16 states have internal predecessors, (1812), 0 states have call successors, (0), 0 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 09:46:58,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 294.0) internal successors, (4998), 17 states have internal predecessors, (4998), 0 states have call successors, (0), 0 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 09:46:58,909 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 294.0) internal successors, (4998), 17 states have internal predecessors, (4998), 0 states have call successors, (0), 0 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 09:46:58,909 INFO L175 Difference]: Start difference. First operand has 357 places, 998 transitions, 20295 flow. Second operand 16 states and 1812 transitions. [2023-08-24 09:46:58,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1342 transitions, 28145 flow [2023-08-24 09:46:59,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1342 transitions, 27080 flow, removed 323 selfloop flow, removed 6 redundant places. [2023-08-24 09:46:59,870 INFO L231 Difference]: Finished difference. Result has 370 places, 1087 transitions, 22308 flow [2023-08-24 09:46:59,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=19345, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=22308, PETRI_PLACES=370, PETRI_TRANSITIONS=1087} [2023-08-24 09:46:59,871 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 340 predicate places. [2023-08-24 09:46:59,871 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1087 transitions, 22308 flow [2023-08-24 09:46:59,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.0) internal successors, (2160), 20 states have internal predecessors, (2160), 0 states have call successors, (0), 0 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 09:46:59,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:46:59,872 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:46:59,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-24 09:47:00,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:00,075 INFO L420 AbstractCegarLoop]: === Iteration 51 === 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 09:47:00,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:47:00,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1843520583, now seen corresponding path program 15 times [2023-08-24 09:47:00,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:47:00,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705825568] [2023-08-24 09:47:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:47:00,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:47:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:00,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:47:00,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705825568] [2023-08-24 09:47:00,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705825568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:47:00,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991280295] [2023-08-24 09:47:00,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:47:00,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:00,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:47:00,172 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:47:00,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-24 09:47:00,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:47:00,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:47:00,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:47:00,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:47:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:00,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:47:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:00,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991280295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:47:00,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:47:00,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 09:47:00,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075612577] [2023-08-24 09:47:00,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:47:00,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:47:00,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:47:00,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:47:00,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:47:00,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:47:00,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1087 transitions, 22308 flow. Second operand has 21 states, 21 states have (on average 107.85714285714286) internal successors, (2265), 21 states have internal predecessors, (2265), 0 states have call successors, (0), 0 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 09:47:00,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:47:00,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:47:00,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:47:03,236 INFO L124 PetriNetUnfolderBase]: 4887/7247 cut-off events. [2023-08-24 09:47:03,236 INFO L125 PetriNetUnfolderBase]: For 214185/214239 co-relation queries the response was YES. [2023-08-24 09:47:03,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80001 conditions, 7247 events. 4887/7247 cut-off events. For 214185/214239 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 39638 event pairs, 408 based on Foata normal form. 79/7313 useless extension candidates. Maximal degree in co-relation 79856. Up to 2157 conditions per place. [2023-08-24 09:47:03,322 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 954 selfloop transitions, 489 changer transitions 0/1484 dead transitions. [2023-08-24 09:47:03,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1484 transitions, 31750 flow [2023-08-24 09:47:03,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 09:47:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 09:47:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2058 transitions. [2023-08-24 09:47:03,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-08-24 09:47:03,324 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2058 transitions. [2023-08-24 09:47:03,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2058 transitions. [2023-08-24 09:47:03,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:47:03,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2058 transitions. [2023-08-24 09:47:03,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 114.33333333333333) internal successors, (2058), 18 states have internal predecessors, (2058), 0 states have call successors, (0), 0 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 09:47:03,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 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 09:47:03,328 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 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 09:47:03,328 INFO L175 Difference]: Start difference. First operand has 370 places, 1087 transitions, 22308 flow. Second operand 18 states and 2058 transitions. [2023-08-24 09:47:03,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1484 transitions, 31750 flow [2023-08-24 09:47:04,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1484 transitions, 31078 flow, removed 295 selfloop flow, removed 6 redundant places. [2023-08-24 09:47:04,700 INFO L231 Difference]: Finished difference. Result has 385 places, 1143 transitions, 24297 flow [2023-08-24 09:47:04,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=21572, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=24297, PETRI_PLACES=385, PETRI_TRANSITIONS=1143} [2023-08-24 09:47:04,702 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 355 predicate places. [2023-08-24 09:47:04,702 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1143 transitions, 24297 flow [2023-08-24 09:47:04,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 107.85714285714286) internal successors, (2265), 21 states have internal predecessors, (2265), 0 states have call successors, (0), 0 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 09:47:04,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:47:04,703 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:47:04,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-24 09:47:04,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:04,908 INFO L420 AbstractCegarLoop]: === Iteration 52 === 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 09:47:04,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:47:04,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1522461833, now seen corresponding path program 20 times [2023-08-24 09:47:04,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:47:04,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367223055] [2023-08-24 09:47:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:47:04,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:47:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:05,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:47:05,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367223055] [2023-08-24 09:47:05,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367223055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:47:05,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119125845] [2023-08-24 09:47:05,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:47:05,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:05,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:47:05,022 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:47:05,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-24 09:47:05,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:47:05,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:47:05,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:47:05,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:47:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:05,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:47:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:05,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119125845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:47:05,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:47:05,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 09:47:05,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8463629] [2023-08-24 09:47:05,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:47:05,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:47:05,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:47:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:47:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:47:05,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:47:05,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1143 transitions, 24297 flow. Second operand has 20 states, 20 states have (on average 107.9) internal successors, (2158), 20 states have internal predecessors, (2158), 0 states have call successors, (0), 0 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 09:47:05,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:47:05,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:47:05,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:47:07,953 INFO L124 PetriNetUnfolderBase]: 4831/7143 cut-off events. [2023-08-24 09:47:07,954 INFO L125 PetriNetUnfolderBase]: For 221840/221876 co-relation queries the response was YES. [2023-08-24 09:47:08,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80842 conditions, 7143 events. 4831/7143 cut-off events. For 221840/221876 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 38635 event pairs, 792 based on Foata normal form. 50/7180 useless extension candidates. Maximal degree in co-relation 80693. Up to 4132 conditions per place. [2023-08-24 09:47:08,044 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 907 selfloop transitions, 369 changer transitions 0/1317 dead transitions. [2023-08-24 09:47:08,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1317 transitions, 28970 flow [2023-08-24 09:47:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:47:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:47:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1463 transitions. [2023-08-24 09:47:08,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38278388278388276 [2023-08-24 09:47:08,046 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1463 transitions. [2023-08-24 09:47:08,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1463 transitions. [2023-08-24 09:47:08,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:47:08,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1463 transitions. [2023-08-24 09:47:08,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 112.53846153846153) internal successors, (1463), 13 states have internal predecessors, (1463), 0 states have call successors, (0), 0 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 09:47:08,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:47:08,050 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 09:47:08,050 INFO L175 Difference]: Start difference. First operand has 385 places, 1143 transitions, 24297 flow. Second operand 13 states and 1463 transitions. [2023-08-24 09:47:08,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1317 transitions, 28970 flow [2023-08-24 09:47:09,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1317 transitions, 28394 flow, removed 216 selfloop flow, removed 6 redundant places. [2023-08-24 09:47:09,525 INFO L231 Difference]: Finished difference. Result has 391 places, 1138 transitions, 24359 flow [2023-08-24 09:47:09,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=23621, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=24359, PETRI_PLACES=391, PETRI_TRANSITIONS=1138} [2023-08-24 09:47:09,526 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 361 predicate places. [2023-08-24 09:47:09,526 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1138 transitions, 24359 flow [2023-08-24 09:47:09,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 107.9) internal successors, (2158), 20 states have internal predecessors, (2158), 0 states have call successors, (0), 0 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 09:47:09,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:47:09,526 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:47:09,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-24 09:47:09,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:09,732 INFO L420 AbstractCegarLoop]: === Iteration 53 === 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 09:47:09,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:47:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1360002511, now seen corresponding path program 16 times [2023-08-24 09:47:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:47:09,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644851245] [2023-08-24 09:47:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:47:09,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:47:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:09,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:47:09,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644851245] [2023-08-24 09:47:09,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644851245] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:47:09,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884988803] [2023-08-24 09:47:09,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:47:09,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:09,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:47:09,821 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:47:09,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-24 09:47:09,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:47:09,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:47:09,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:47:09,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:47:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:10,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:47:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:10,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884988803] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:47:10,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:47:10,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-08-24 09:47:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223071402] [2023-08-24 09:47:10,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:47:10,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:47:10,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:47:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:47:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:47:10,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 09:47:10,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1138 transitions, 24359 flow. Second operand has 17 states, 17 states have (on average 103.41176470588235) internal successors, (1758), 17 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:47:10,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:47:10,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 09:47:10,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:47:12,772 INFO L124 PetriNetUnfolderBase]: 4931/7299 cut-off events. [2023-08-24 09:47:12,772 INFO L125 PetriNetUnfolderBase]: For 209847/209847 co-relation queries the response was YES. [2023-08-24 09:47:12,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80995 conditions, 7299 events. 4931/7299 cut-off events. For 209847/209847 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 39510 event pairs, 313 based on Foata normal form. 12/7311 useless extension candidates. Maximal degree in co-relation 80846. Up to 2167 conditions per place. [2023-08-24 09:47:12,856 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 751 selfloop transitions, 661 changer transitions 1/1413 dead transitions. [2023-08-24 09:47:12,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1413 transitions, 31571 flow [2023-08-24 09:47:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 09:47:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 09:47:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2158 transitions. [2023-08-24 09:47:12,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36700680272108843 [2023-08-24 09:47:12,858 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2158 transitions. [2023-08-24 09:47:12,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2158 transitions. [2023-08-24 09:47:12,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:47:12,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2158 transitions. [2023-08-24 09:47:12,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 107.9) internal successors, (2158), 20 states have internal predecessors, (2158), 0 states have call successors, (0), 0 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 09:47:12,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 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 09:47:12,862 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 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 09:47:12,862 INFO L175 Difference]: Start difference. First operand has 391 places, 1138 transitions, 24359 flow. Second operand 20 states and 2158 transitions. [2023-08-24 09:47:12,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1413 transitions, 31571 flow [2023-08-24 09:47:14,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1413 transitions, 30758 flow, removed 38 selfloop flow, removed 12 redundant places. [2023-08-24 09:47:14,102 INFO L231 Difference]: Finished difference. Result has 401 places, 1205 transitions, 26291 flow [2023-08-24 09:47:14,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=23547, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=26291, PETRI_PLACES=401, PETRI_TRANSITIONS=1205} [2023-08-24 09:47:14,234 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 371 predicate places. [2023-08-24 09:47:14,234 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1205 transitions, 26291 flow [2023-08-24 09:47:14,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 103.41176470588235) internal successors, (1758), 17 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:47:14,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:47:14,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:47:14,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-24 09:47:14,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-24 09:47:14,435 INFO L420 AbstractCegarLoop]: === Iteration 54 === 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 09:47:14,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:47:14,435 INFO L85 PathProgramCache]: Analyzing trace with hash 857190545, now seen corresponding path program 17 times [2023-08-24 09:47:14,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:47:14,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959350483] [2023-08-24 09:47:14,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:47:14,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:47:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:14,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:47:14,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959350483] [2023-08-24 09:47:14,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959350483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:47:14,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044508367] [2023-08-24 09:47:14,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:47:14,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:14,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:47:14,570 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:47:14,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-24 09:47:14,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:47:14,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:47:14,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:47:14,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:47:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:14,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:47:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:14,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044508367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:47:14,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:47:14,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-24 09:47:14,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133416003] [2023-08-24 09:47:14,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:47:14,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:47:14,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:47:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:47:14,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:47:14,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 09:47:14,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1205 transitions, 26291 flow. Second operand has 18 states, 18 states have (on average 103.27777777777777) internal successors, (1859), 18 states have internal predecessors, (1859), 0 states have call successors, (0), 0 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 09:47:14,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:47:14,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 09:47:14,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:47:17,881 INFO L124 PetriNetUnfolderBase]: 4938/7312 cut-off events. [2023-08-24 09:47:17,881 INFO L125 PetriNetUnfolderBase]: For 216372/216372 co-relation queries the response was YES. [2023-08-24 09:47:17,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82536 conditions, 7312 events. 4938/7312 cut-off events. For 216372/216372 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 39476 event pairs, 528 based on Foata normal form. 14/7326 useless extension candidates. Maximal degree in co-relation 82385. Up to 2182 conditions per place. [2023-08-24 09:47:18,145 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 802 selfloop transitions, 605 changer transitions 1/1408 dead transitions. [2023-08-24 09:47:18,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 1408 transitions, 31907 flow [2023-08-24 09:47:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 09:47:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 09:47:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2787 transitions. [2023-08-24 09:47:18,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36459968602825743 [2023-08-24 09:47:18,147 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2787 transitions. [2023-08-24 09:47:18,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2787 transitions. [2023-08-24 09:47:18,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:47:18,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2787 transitions. [2023-08-24 09:47:18,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 107.1923076923077) internal successors, (2787), 26 states have internal predecessors, (2787), 0 states have call successors, (0), 0 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 09:47:18,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 294.0) internal successors, (7938), 27 states have internal predecessors, (7938), 0 states have call successors, (0), 0 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 09:47:18,153 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 294.0) internal successors, (7938), 27 states have internal predecessors, (7938), 0 states have call successors, (0), 0 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 09:47:18,153 INFO L175 Difference]: Start difference. First operand has 401 places, 1205 transitions, 26291 flow. Second operand 26 states and 2787 transitions. [2023-08-24 09:47:18,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 1408 transitions, 31907 flow [2023-08-24 09:47:19,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1408 transitions, 31328 flow, removed 55 selfloop flow, removed 10 redundant places. [2023-08-24 09:47:19,562 INFO L231 Difference]: Finished difference. Result has 419 places, 1211 transitions, 27137 flow [2023-08-24 09:47:19,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=25728, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=599, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=27137, PETRI_PLACES=419, PETRI_TRANSITIONS=1211} [2023-08-24 09:47:19,563 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 389 predicate places. [2023-08-24 09:47:19,563 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 1211 transitions, 27137 flow [2023-08-24 09:47:19,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 103.27777777777777) internal successors, (1859), 18 states have internal predecessors, (1859), 0 states have call successors, (0), 0 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 09:47:19,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:47:19,564 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:47:19,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-24 09:47:19,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-24 09:47:19,770 INFO L420 AbstractCegarLoop]: === Iteration 55 === 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 09:47:19,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:47:19,770 INFO L85 PathProgramCache]: Analyzing trace with hash 232208751, now seen corresponding path program 18 times [2023-08-24 09:47:19,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:47:19,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478492745] [2023-08-24 09:47:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:47:19,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:47:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:19,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:47:19,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478492745] [2023-08-24 09:47:19,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478492745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:47:19,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364529371] [2023-08-24 09:47:19,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:47:19,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:19,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:47:19,862 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:47:19,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-24 09:47:20,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:47:20,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:47:20,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:47:20,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:47:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:20,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:47:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:20,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364529371] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:47:20,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:47:20,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 09:47:20,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349807821] [2023-08-24 09:47:20,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:47:20,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:47:20,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:47:20,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:47:20,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:47:20,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:47:20,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1211 transitions, 27137 flow. Second operand has 20 states, 20 states have (on average 107.9) internal successors, (2158), 20 states have internal predecessors, (2158), 0 states have call successors, (0), 0 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 09:47:20,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:47:20,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:47:20,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:47:22,994 INFO L124 PetriNetUnfolderBase]: 4874/7218 cut-off events. [2023-08-24 09:47:22,995 INFO L125 PetriNetUnfolderBase]: For 218640/218672 co-relation queries the response was YES. [2023-08-24 09:47:23,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82803 conditions, 7218 events. 4874/7218 cut-off events. For 218640/218672 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 39225 event pairs, 402 based on Foata normal form. 22/7227 useless extension candidates. Maximal degree in co-relation 82651. Up to 2155 conditions per place. [2023-08-24 09:47:23,085 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 943 selfloop transitions, 520 changer transitions 0/1516 dead transitions. [2023-08-24 09:47:23,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1516 transitions, 34674 flow [2023-08-24 09:47:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 09:47:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 09:47:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2049 transitions. [2023-08-24 09:47:23,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38718820861678005 [2023-08-24 09:47:23,087 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2049 transitions. [2023-08-24 09:47:23,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2049 transitions. [2023-08-24 09:47:23,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:47:23,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2049 transitions. [2023-08-24 09:47:23,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 113.83333333333333) internal successors, (2049), 18 states have internal predecessors, (2049), 0 states have call successors, (0), 0 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 09:47:23,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 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 09:47:23,093 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 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 09:47:23,093 INFO L175 Difference]: Start difference. First operand has 419 places, 1211 transitions, 27137 flow. Second operand 18 states and 2049 transitions. [2023-08-24 09:47:23,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1516 transitions, 34674 flow [2023-08-24 09:47:24,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1516 transitions, 33068 flow, removed 45 selfloop flow, removed 20 redundant places. [2023-08-24 09:47:24,834 INFO L231 Difference]: Finished difference. Result has 416 places, 1207 transitions, 26566 flow [2023-08-24 09:47:24,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=25526, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=520, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=26566, PETRI_PLACES=416, PETRI_TRANSITIONS=1207} [2023-08-24 09:47:24,835 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 386 predicate places. [2023-08-24 09:47:24,835 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1207 transitions, 26566 flow [2023-08-24 09:47:24,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 107.9) internal successors, (2158), 20 states have internal predecessors, (2158), 0 states have call successors, (0), 0 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 09:47:24,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:47:24,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:47:24,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-24 09:47:25,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:25,045 INFO L420 AbstractCegarLoop]: === Iteration 56 === 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 09:47:25,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:47:25,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1843313217, now seen corresponding path program 21 times [2023-08-24 09:47:25,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:47:25,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909412492] [2023-08-24 09:47:25,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:47:25,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:47:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:25,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:47:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909412492] [2023-08-24 09:47:25,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909412492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:47:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393273614] [2023-08-24 09:47:25,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:47:25,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:25,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:47:25,164 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:47:25,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-24 09:47:25,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:47:25,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:47:25,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:47:25,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:47:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:25,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:47:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:25,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393273614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:47:25,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:47:25,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 09:47:25,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150449879] [2023-08-24 09:47:25,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:47:25,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:47:25,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:47:25,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:47:25,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:47:25,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:47:25,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1207 transitions, 26566 flow. Second operand has 19 states, 19 states have (on average 108.10526315789474) internal successors, (2054), 19 states have internal predecessors, (2054), 0 states have call successors, (0), 0 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 09:47:25,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:47:25,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:47:25,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:47:27,931 INFO L124 PetriNetUnfolderBase]: 4640/6796 cut-off events. [2023-08-24 09:47:27,931 INFO L125 PetriNetUnfolderBase]: For 211071/211079 co-relation queries the response was YES. [2023-08-24 09:47:28,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78885 conditions, 6796 events. 4640/6796 cut-off events. For 211071/211079 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 35763 event pairs, 641 based on Foata normal form. 152/6944 useless extension candidates. Maximal degree in co-relation 78734. Up to 3830 conditions per place. [2023-08-24 09:47:28,181 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 754 selfloop transitions, 610 changer transitions 0/1412 dead transitions. [2023-08-24 09:47:28,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 1412 transitions, 31750 flow [2023-08-24 09:47:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 09:47:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 09:47:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1694 transitions. [2023-08-24 09:47:28,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38412698412698415 [2023-08-24 09:47:28,183 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1694 transitions. [2023-08-24 09:47:28,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1694 transitions. [2023-08-24 09:47:28,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:47:28,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1694 transitions. [2023-08-24 09:47:28,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 112.93333333333334) internal successors, (1694), 15 states have internal predecessors, (1694), 0 states have call successors, (0), 0 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 09:47:28,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 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 09:47:28,187 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 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 09:47:28,187 INFO L175 Difference]: Start difference. First operand has 416 places, 1207 transitions, 26566 flow. Second operand 15 states and 1694 transitions. [2023-08-24 09:47:28,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 1412 transitions, 31750 flow [2023-08-24 09:47:29,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1412 transitions, 30840 flow, removed 65 selfloop flow, removed 17 redundant places. [2023-08-24 09:47:29,401 INFO L231 Difference]: Finished difference. Result has 407 places, 1182 transitions, 26302 flow [2023-08-24 09:47:29,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=24804, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=26302, PETRI_PLACES=407, PETRI_TRANSITIONS=1182} [2023-08-24 09:47:29,402 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2023-08-24 09:47:29,402 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1182 transitions, 26302 flow [2023-08-24 09:47:29,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 108.10526315789474) internal successors, (2054), 19 states have internal predecessors, (2054), 0 states have call successors, (0), 0 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 09:47:29,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:47:29,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:47:29,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-24 09:47:29,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-24 09:47:29,603 INFO L420 AbstractCegarLoop]: === Iteration 57 === 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 09:47:29,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:47:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1460735005, now seen corresponding path program 19 times [2023-08-24 09:47:29,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:47:29,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679589790] [2023-08-24 09:47:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:47:29,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:47:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:29,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:47:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679589790] [2023-08-24 09:47:29,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679589790] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:47:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782495405] [2023-08-24 09:47:29,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:47:29,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:47:29,692 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:47:29,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-24 09:47:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:29,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:47:29,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:47:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:29,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:47:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:30,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782495405] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:47:30,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:47:30,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 09:47:30,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098128698] [2023-08-24 09:47:30,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:47:30,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:47:30,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:47:30,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:47:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:47:30,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:47:30,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1182 transitions, 26302 flow. Second operand has 18 states, 18 states have (on average 108.11111111111111) internal successors, (1946), 18 states have internal predecessors, (1946), 0 states have call successors, (0), 0 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 09:47:30,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:47:30,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:47:30,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:47:32,348 INFO L124 PetriNetUnfolderBase]: 4629/6773 cut-off events. [2023-08-24 09:47:32,348 INFO L125 PetriNetUnfolderBase]: For 202932/202946 co-relation queries the response was YES. [2023-08-24 09:47:32,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78705 conditions, 6773 events. 4629/6773 cut-off events. For 202932/202946 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 35341 event pairs, 942 based on Foata normal form. 33/6796 useless extension candidates. Maximal degree in co-relation 78556. Up to 4627 conditions per place. [2023-08-24 09:47:32,427 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 953 selfloop transitions, 239 changer transitions 0/1239 dead transitions. [2023-08-24 09:47:32,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1239 transitions, 29649 flow [2023-08-24 09:47:32,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:47:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:47:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1128 transitions. [2023-08-24 09:47:32,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3836734693877551 [2023-08-24 09:47:32,430 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1128 transitions. [2023-08-24 09:47:32,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1128 transitions. [2023-08-24 09:47:32,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:47:32,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1128 transitions. [2023-08-24 09:47:32,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 112.8) internal successors, (1128), 10 states have internal predecessors, (1128), 0 states have call successors, (0), 0 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 09:47:32,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 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 09:47:32,432 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 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 09:47:32,432 INFO L175 Difference]: Start difference. First operand has 407 places, 1182 transitions, 26302 flow. Second operand 10 states and 1128 transitions. [2023-08-24 09:47:32,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1239 transitions, 29649 flow [2023-08-24 09:47:33,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1239 transitions, 28626 flow, removed 80 selfloop flow, removed 11 redundant places. [2023-08-24 09:47:33,642 INFO L231 Difference]: Finished difference. Result has 406 places, 1178 transitions, 25739 flow [2023-08-24 09:47:33,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=25153, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=25739, PETRI_PLACES=406, PETRI_TRANSITIONS=1178} [2023-08-24 09:47:33,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 376 predicate places. [2023-08-24 09:47:33,643 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 1178 transitions, 25739 flow [2023-08-24 09:47:33,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.11111111111111) internal successors, (1946), 18 states have internal predecessors, (1946), 0 states have call successors, (0), 0 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 09:47:33,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:47:33,643 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:47:33,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-24 09:47:33,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-24 09:47:33,844 INFO L420 AbstractCegarLoop]: === Iteration 58 === 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 09:47:33,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:47:33,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1375102413, now seen corresponding path program 20 times [2023-08-24 09:47:33,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:47:33,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373768199] [2023-08-24 09:47:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:47:33,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:47:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:33,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:47:33,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373768199] [2023-08-24 09:47:33,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373768199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:47:33,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540274780] [2023-08-24 09:47:33,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:47:33,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:33,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:47:33,940 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:47:33,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-24 09:47:34,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:47:34,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:47:34,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:47:34,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:47:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:34,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:47:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:47:34,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540274780] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:47:34,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:47:34,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 09:47:34,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793262143] [2023-08-24 09:47:34,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:47:34,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:47:34,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:47:34,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:47:34,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:47:34,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 09:47:34,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 1178 transitions, 25739 flow. Second operand has 19 states, 19 states have (on average 107.94736842105263) internal successors, (2051), 19 states have internal predecessors, (2051), 0 states have call successors, (0), 0 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 09:47:34,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:47:34,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 09:47:34,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:47:36,589 INFO L124 PetriNetUnfolderBase]: 4590/6700 cut-off events. [2023-08-24 09:47:36,590 INFO L125 PetriNetUnfolderBase]: For 204809/204829 co-relation queries the response was YES. [2023-08-24 09:47:36,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77076 conditions, 6700 events. 4590/6700 cut-off events. For 204809/204829 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 34796 event pairs, 1066 based on Foata normal form. 33/6720 useless extension candidates. Maximal degree in co-relation 76926. Up to 5479 conditions per place. [2023-08-24 09:47:36,675 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 918 selfloop transitions, 265 changer transitions 0/1229 dead transitions. [2023-08-24 09:47:36,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1229 transitions, 28735 flow [2023-08-24 09:47:36,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 09:47:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 09:47:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1235 transitions. [2023-08-24 09:47:36,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3818800247371676 [2023-08-24 09:47:36,678 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1235 transitions. [2023-08-24 09:47:36,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1235 transitions. [2023-08-24 09:47:36,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:47:36,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1235 transitions. [2023-08-24 09:47:36,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 112.27272727272727) internal successors, (1235), 11 states have internal predecessors, (1235), 0 states have call successors, (0), 0 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 09:47:36,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 294.0) internal successors, (3528), 12 states have internal predecessors, (3528), 0 states have call successors, (0), 0 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 09:47:36,680 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 294.0) internal successors, (3528), 12 states have internal predecessors, (3528), 0 states have call successors, (0), 0 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 09:47:36,681 INFO L175 Difference]: Start difference. First operand has 406 places, 1178 transitions, 25739 flow. Second operand 11 states and 1235 transitions. [2023-08-24 09:47:36,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1229 transitions, 28735 flow [2023-08-24 09:47:38,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1229 transitions, 28237 flow, removed 23 selfloop flow, removed 8 redundant places. [2023-08-24 09:47:38,034 INFO L231 Difference]: Finished difference. Result has 407 places, 1169 transitions, 25687 flow [2023-08-24 09:47:38,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=25047, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=902, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=25687, PETRI_PLACES=407, PETRI_TRANSITIONS=1169} [2023-08-24 09:47:38,036 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2023-08-24 09:47:38,036 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1169 transitions, 25687 flow [2023-08-24 09:47:38,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 107.94736842105263) internal successors, (2051), 19 states have internal predecessors, (2051), 0 states have call successors, (0), 0 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 09:47:38,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:47:38,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:47:38,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-24 09:47:38,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:38,242 INFO L420 AbstractCegarLoop]: === Iteration 59 === 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 09:47:38,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:47:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1896569917, now seen corresponding path program 7 times [2023-08-24 09:47:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:47:38,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243504771] [2023-08-24 09:47:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:47:38,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:47:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:47:39,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:47:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243504771] [2023-08-24 09:47:39,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243504771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:47:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936794038] [2023-08-24 09:47:39,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:47:39,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:39,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:47:39,325 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:47:39,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-24 09:47:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:39,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-24 09:47:39,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:47:40,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:47:40,043 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 20 treesize of output 20 [2023-08-24 09:47:40,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:47:40,114 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 20 treesize of output 20 [2023-08-24 09:47:40,366 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:47:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:47:40,370 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:47:40,370 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 15 [2023-08-24 09:47:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:47:40,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:47:40,721 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_thread3Thread1of1ForFork2_~i~2_207 Int) (v_ArrVal_2613 (Array Int Int))) (or (< v_thread3Thread1of1ForFork2_~i~2_207 1) (= (mod (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2613) c_~A~0.base))) (+ c_~sum3~0 (select .cse0 c_~A~0.offset) (select .cse0 (+ (* v_thread3Thread1of1ForFork2_~i~2_207 4) c_~A~0.offset)) c_~sum2~0)) 4294967296) (mod c_~sum1~0 4294967296)) (<= c_~N~0 v_thread3Thread1of1ForFork2_~i~2_207))) is different from false [2023-08-24 09:47:40,747 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_thread3Thread1of1ForFork2_~i~2_207 Int) (v_ArrVal_2613 (Array Int Int)) (v_ArrVal_2612 (Array Int Int))) (or (= (mod (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2612) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2613) c_~A~0.base))) (+ c_~sum3~0 (select .cse0 c_~A~0.offset) c_~sum2~0 (select .cse0 (+ (* v_thread3Thread1of1ForFork2_~i~2_207 4) c_~A~0.offset)))) 4294967296) (mod c_~sum1~0 4294967296)) (< v_thread3Thread1of1ForFork2_~i~2_207 1) (<= c_~N~0 v_thread3Thread1of1ForFork2_~i~2_207))) is different from false [2023-08-24 09:47:40,764 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_thread3Thread1of1ForFork2_~i~2_207 Int) (v_ArrVal_2613 (Array Int Int)) (v_ArrVal_2612 (Array Int Int))) (or (< v_thread3Thread1of1ForFork2_~i~2_207 1) (= (mod (+ c_~sum1~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) 4294967296) (mod (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2612) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2613) c_~A~0.base))) (+ c_~sum3~0 (select .cse0 c_~A~0.offset) c_~sum2~0 (select .cse0 (+ (* v_thread3Thread1of1ForFork2_~i~2_207 4) c_~A~0.offset)))) 4294967296)) (<= c_~N~0 v_thread3Thread1of1ForFork2_~i~2_207))) is different from false [2023-08-24 09:47:40,825 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 09:47:40,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 390 treesize of output 266 [2023-08-24 09:47:40,833 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:47:40,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2023-08-24 09:47:40,847 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:47:40,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 42 [2023-08-24 09:47:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-24 09:47:45,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936794038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:47:45,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:47:45,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-08-24 09:47:45,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726690581] [2023-08-24 09:47:45,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:47:45,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 09:47:45,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:47:45,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 09:47:45,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1116, Unknown=3, NotChecked=210, Total=1482 [2023-08-24 09:47:45,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 09:47:45,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1169 transitions, 25687 flow. Second operand has 39 states, 39 states have (on average 73.82051282051282) internal successors, (2879), 39 states have internal predecessors, (2879), 0 states have call successors, (0), 0 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 09:47:45,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:47:45,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 09:47:45,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:47:51,075 INFO L124 PetriNetUnfolderBase]: 7159/10444 cut-off events. [2023-08-24 09:47:51,075 INFO L125 PetriNetUnfolderBase]: For 297108/297108 co-relation queries the response was YES. [2023-08-24 09:47:51,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121521 conditions, 10444 events. 7159/10444 cut-off events. For 297108/297108 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 57501 event pairs, 562 based on Foata normal form. 3/10447 useless extension candidates. Maximal degree in co-relation 121370. Up to 7705 conditions per place. [2023-08-24 09:47:51,217 INFO L140 encePairwiseOnDemand]: 280/294 looper letters, 1437 selfloop transitions, 687 changer transitions 3/2127 dead transitions. [2023-08-24 09:47:51,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 2127 transitions, 51534 flow [2023-08-24 09:47:51,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 09:47:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 09:47:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2218 transitions. [2023-08-24 09:47:51,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2794154698916604 [2023-08-24 09:47:51,219 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2218 transitions. [2023-08-24 09:47:51,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2218 transitions. [2023-08-24 09:47:51,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:47:51,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2218 transitions. [2023-08-24 09:47:51,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 82.14814814814815) internal successors, (2218), 27 states have internal predecessors, (2218), 0 states have call successors, (0), 0 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 09:47:51,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 294.0) internal successors, (8232), 28 states have internal predecessors, (8232), 0 states have call successors, (0), 0 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 09:47:51,225 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 294.0) internal successors, (8232), 28 states have internal predecessors, (8232), 0 states have call successors, (0), 0 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 09:47:51,225 INFO L175 Difference]: Start difference. First operand has 407 places, 1169 transitions, 25687 flow. Second operand 27 states and 2218 transitions. [2023-08-24 09:47:51,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 2127 transitions, 51534 flow [2023-08-24 09:47:53,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 2127 transitions, 50270 flow, removed 46 selfloop flow, removed 9 redundant places. [2023-08-24 09:47:53,851 INFO L231 Difference]: Finished difference. Result has 444 places, 1781 transitions, 43451 flow [2023-08-24 09:47:53,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=25157, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=43451, PETRI_PLACES=444, PETRI_TRANSITIONS=1781} [2023-08-24 09:47:53,852 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 414 predicate places. [2023-08-24 09:47:53,852 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 1781 transitions, 43451 flow [2023-08-24 09:47:53,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 73.82051282051282) internal successors, (2879), 39 states have internal predecessors, (2879), 0 states have call successors, (0), 0 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 09:47:53,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:47:53,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:47:53,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-24 09:47:54,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:54,054 INFO L420 AbstractCegarLoop]: === Iteration 60 === 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 09:47:54,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:47:54,054 INFO L85 PathProgramCache]: Analyzing trace with hash -937618277, now seen corresponding path program 8 times [2023-08-24 09:47:54,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:47:54,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007325908] [2023-08-24 09:47:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:47:54,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:47:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:47:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:47:55,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:47:55,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007325908] [2023-08-24 09:47:55,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007325908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:47:55,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806593749] [2023-08-24 09:47:55,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:47:55,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:47:55,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:47:55,345 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:47:55,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-24 09:47:55,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:47:55,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:47:55,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 09:47:55,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:47:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:47:56,035 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:47:56,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2023-08-24 09:47:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:47:56,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:47:56,613 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 09:47:56,613 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 51 [2023-08-24 09:48:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:48:01,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806593749] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:48:01,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:48:01,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 32 [2023-08-24 09:48:01,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475659728] [2023-08-24 09:48:01,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:48:01,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:48:01,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:01,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:48:01,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 09:48:01,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 09:48:01,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 1781 transitions, 43451 flow. Second operand has 34 states, 34 states have (on average 74.26470588235294) internal successors, (2525), 34 states have internal predecessors, (2525), 0 states have call successors, (0), 0 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 09:48:01,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:01,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 09:48:01,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:11,091 INFO L124 PetriNetUnfolderBase]: 9788/14272 cut-off events. [2023-08-24 09:48:11,091 INFO L125 PetriNetUnfolderBase]: For 469413/469413 co-relation queries the response was YES. [2023-08-24 09:48:11,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172463 conditions, 14272 events. 9788/14272 cut-off events. For 469413/469413 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 82753 event pairs, 948 based on Foata normal form. 3/14275 useless extension candidates. Maximal degree in co-relation 172292. Up to 10670 conditions per place. [2023-08-24 09:48:11,310 INFO L140 encePairwiseOnDemand]: 279/294 looper letters, 1913 selfloop transitions, 891 changer transitions 5/2809 dead transitions. [2023-08-24 09:48:11,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 2809 transitions, 71536 flow [2023-08-24 09:48:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 09:48:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 09:48:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3369 transitions. [2023-08-24 09:48:11,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2794922847187656 [2023-08-24 09:48:11,314 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3369 transitions. [2023-08-24 09:48:11,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3369 transitions. [2023-08-24 09:48:11,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:11,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3369 transitions. [2023-08-24 09:48:11,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 82.17073170731707) internal successors, (3369), 41 states have internal predecessors, (3369), 0 states have call successors, (0), 0 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 09:48:11,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 294.0) internal successors, (12348), 42 states have internal predecessors, (12348), 0 states have call successors, (0), 0 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 09:48:11,326 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 294.0) internal successors, (12348), 42 states have internal predecessors, (12348), 0 states have call successors, (0), 0 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 09:48:11,326 INFO L175 Difference]: Start difference. First operand has 444 places, 1781 transitions, 43451 flow. Second operand 41 states and 3369 transitions. [2023-08-24 09:48:11,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 2809 transitions, 71536 flow [2023-08-24 09:48:17,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 2809 transitions, 68254 flow, removed 1559 selfloop flow, removed 4 redundant places. [2023-08-24 09:48:17,178 INFO L231 Difference]: Finished difference. Result has 500 places, 2361 transitions, 58465 flow [2023-08-24 09:48:17,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=41096, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=58465, PETRI_PLACES=500, PETRI_TRANSITIONS=2361} [2023-08-24 09:48:17,179 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 470 predicate places. [2023-08-24 09:48:17,179 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 2361 transitions, 58465 flow [2023-08-24 09:48:17,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 74.26470588235294) internal successors, (2525), 34 states have internal predecessors, (2525), 0 states have call successors, (0), 0 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 09:48:17,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:17,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:48:17,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-08-24 09:48:17,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-24 09:48:17,381 INFO L420 AbstractCegarLoop]: === Iteration 61 === 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 09:48:17,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash -160284943, now seen corresponding path program 9 times [2023-08-24 09:48:17,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:17,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683166084] [2023-08-24 09:48:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:17,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:18,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:18,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683166084] [2023-08-24 09:48:18,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683166084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:18,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718569164] [2023-08-24 09:48:18,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:48:18,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:18,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:48:18,305 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:48:18,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-24 09:48:18,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:48:18,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:48:18,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 09:48:18,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:48:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:48:19,195 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:48:19,195 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2023-08-24 09:48:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:48:19,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:48:19,754 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 09:48:19,755 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 51 [2023-08-24 09:48:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:48:25,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718569164] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:48:25,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:48:25,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 30 [2023-08-24 09:48:25,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133229170] [2023-08-24 09:48:25,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:48:25,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 09:48:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 09:48:25,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2023-08-24 09:48:25,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 09:48:25,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 2361 transitions, 58465 flow. Second operand has 32 states, 32 states have (on average 84.40625) internal successors, (2701), 32 states have internal predecessors, (2701), 0 states have call successors, (0), 0 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 09:48:25,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:25,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 09:48:25,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:35,017 INFO L124 PetriNetUnfolderBase]: 9878/14403 cut-off events. [2023-08-24 09:48:35,018 INFO L125 PetriNetUnfolderBase]: For 474968/474968 co-relation queries the response was YES. [2023-08-24 09:48:35,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174973 conditions, 14403 events. 9878/14403 cut-off events. For 474968/474968 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 83497 event pairs, 1000 based on Foata normal form. 1/14404 useless extension candidates. Maximal degree in co-relation 174783. Up to 12573 conditions per place. [2023-08-24 09:48:35,228 INFO L140 encePairwiseOnDemand]: 280/294 looper letters, 2088 selfloop transitions, 545 changer transitions 3/2636 dead transitions. [2023-08-24 09:48:35,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 2636 transitions, 69299 flow [2023-08-24 09:48:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 09:48:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 09:48:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2118 transitions. [2023-08-24 09:48:35,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3132209405501331 [2023-08-24 09:48:35,231 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2118 transitions. [2023-08-24 09:48:35,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2118 transitions. [2023-08-24 09:48:35,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:35,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2118 transitions. [2023-08-24 09:48:35,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 92.08695652173913) internal successors, (2118), 23 states have internal predecessors, (2118), 0 states have call successors, (0), 0 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 09:48:35,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 294.0) internal successors, (7056), 24 states have internal predecessors, (7056), 0 states have call successors, (0), 0 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 09:48:35,235 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 294.0) internal successors, (7056), 24 states have internal predecessors, (7056), 0 states have call successors, (0), 0 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 09:48:35,235 INFO L175 Difference]: Start difference. First operand has 500 places, 2361 transitions, 58465 flow. Second operand 23 states and 2118 transitions. [2023-08-24 09:48:35,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 2636 transitions, 69299 flow [2023-08-24 09:48:42,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 2636 transitions, 64501 flow, removed 2333 selfloop flow, removed 6 redundant places. [2023-08-24 09:48:42,235 INFO L231 Difference]: Finished difference. Result has 524 places, 2394 transitions, 56032 flow [2023-08-24 09:48:42,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=53803, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=56032, PETRI_PLACES=524, PETRI_TRANSITIONS=2394} [2023-08-24 09:48:42,238 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 494 predicate places. [2023-08-24 09:48:42,238 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 2394 transitions, 56032 flow [2023-08-24 09:48:42,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 84.40625) internal successors, (2701), 32 states have internal predecessors, (2701), 0 states have call successors, (0), 0 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 09:48:42,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:42,238 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:48:42,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-24 09:48:42,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:42,439 INFO L420 AbstractCegarLoop]: === Iteration 62 === 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 09:48:42,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:42,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1550328365, now seen corresponding path program 10 times [2023-08-24 09:48:42,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:42,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041671580] [2023-08-24 09:48:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:42,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:43,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:43,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041671580] [2023-08-24 09:48:43,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041671580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:43,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384383624] [2023-08-24 09:48:43,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:48:43,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:43,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:48:43,588 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:48:43,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-24 09:48:43,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:48:43,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:48:43,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 09:48:43,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:48:44,370 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:48:44,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:48:44,374 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:48:44,375 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 15 [2023-08-24 09:48:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:48:44,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:48:44,958 INFO L322 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2023-08-24 09:48:44,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 41 [2023-08-24 09:48:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:48:46,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384383624] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:48:46,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:48:46,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 31 [2023-08-24 09:48:46,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527057043] [2023-08-24 09:48:46,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:48:46,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 09:48:46,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:46,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 09:48:46,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 09:48:46,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 09:48:46,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 2394 transitions, 56032 flow. Second operand has 33 states, 33 states have (on average 74.15151515151516) internal successors, (2447), 33 states have internal predecessors, (2447), 0 states have call successors, (0), 0 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 09:48:46,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:46,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 09:48:46,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:59,893 INFO L124 PetriNetUnfolderBase]: 12339/17839 cut-off events. [2023-08-24 09:48:59,893 INFO L125 PetriNetUnfolderBase]: For 599953/599953 co-relation queries the response was YES. [2023-08-24 09:49:00,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212920 conditions, 17839 events. 12339/17839 cut-off events. For 599953/599953 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 105526 event pairs, 909 based on Foata normal form. 5/17844 useless extension candidates. Maximal degree in co-relation 212722. Up to 12034 conditions per place. [2023-08-24 09:49:00,239 INFO L140 encePairwiseOnDemand]: 279/294 looper letters, 1781 selfloop transitions, 1603 changer transitions 4/3388 dead transitions. [2023-08-24 09:49:00,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 3388 transitions, 84127 flow [2023-08-24 09:49:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 09:49:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 09:49:00,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3684 transitions. [2023-08-24 09:49:00,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2784580498866213 [2023-08-24 09:49:00,243 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3684 transitions. [2023-08-24 09:49:00,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3684 transitions. [2023-08-24 09:49:00,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:49:00,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3684 transitions. [2023-08-24 09:49:00,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 81.86666666666666) internal successors, (3684), 45 states have internal predecessors, (3684), 0 states have call successors, (0), 0 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 09:49:00,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 294.0) internal successors, (13524), 46 states have internal predecessors, (13524), 0 states have call successors, (0), 0 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 09:49:00,252 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 294.0) internal successors, (13524), 46 states have internal predecessors, (13524), 0 states have call successors, (0), 0 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 09:49:00,252 INFO L175 Difference]: Start difference. First operand has 524 places, 2394 transitions, 56032 flow. Second operand 45 states and 3684 transitions. [2023-08-24 09:49:00,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 3388 transitions, 84127 flow [2023-08-24 09:49:10,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 3388 transitions, 82914 flow, removed 279 selfloop flow, removed 12 redundant places. [2023-08-24 09:49:10,720 INFO L231 Difference]: Finished difference. Result has 584 places, 2957 transitions, 73895 flow [2023-08-24 09:49:10,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=54950, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=73895, PETRI_PLACES=584, PETRI_TRANSITIONS=2957} [2023-08-24 09:49:10,722 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 554 predicate places. [2023-08-24 09:49:10,722 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 2957 transitions, 73895 flow [2023-08-24 09:49:10,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 74.15151515151516) internal successors, (2447), 33 states have internal predecessors, (2447), 0 states have call successors, (0), 0 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 09:49:10,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:49:10,722 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:49:10,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-24 09:49:10,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-08-24 09:49:10,923 INFO L420 AbstractCegarLoop]: === Iteration 63 === 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 09:49:10,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:49:10,924 INFO L85 PathProgramCache]: Analyzing trace with hash -477465809, now seen corresponding path program 11 times [2023-08-24 09:49:10,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:49:10,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614266055] [2023-08-24 09:49:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:49:10,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:49:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:49:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:49:11,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:49:11,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614266055] [2023-08-24 09:49:11,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614266055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:49:11,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814730378] [2023-08-24 09:49:11,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:49:11,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:49:11,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:49:11,955 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:49:11,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-24 09:49:12,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:49:12,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:49:12,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-24 09:49:12,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:49:12,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:49:12,431 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 28 treesize of output 23 [2023-08-24 09:49:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:49:12,526 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 39 treesize of output 35 [2023-08-24 09:49:12,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:49:12,617 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 39 treesize of output 35 [2023-08-24 09:49:12,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:49:12,700 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 39 treesize of output 35 [2023-08-24 09:49:13,262 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:49:13,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:49:13,267 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:49:13,267 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 31 [2023-08-24 09:49:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:49:13,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:49:13,953 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_thread3Thread1of1ForFork2_~i~2_219 Int) (v_ArrVal_2812 (Array Int Int))) (or (< v_thread3Thread1of1ForFork2_~i~2_219 1) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2812) c_~A~0.base))) (let ((.cse0 (select .cse1 c_~A~0.offset))) (= (mod (+ .cse0 (select .cse1 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_219 4))) c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ .cse0 c_~sum1~0 (select .cse1 (+ c_~A~0.offset 4))) 4294967296)))) (<= c_~N~0 v_thread3Thread1of1ForFork2_~i~2_219))) is different from false [2023-08-24 09:49:13,981 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_thread3Thread1of1ForFork2_~i~2_219 Int) (v_ArrVal_2812 (Array Int Int)) (v_ArrVal_2811 (Array Int Int))) (or (< v_thread3Thread1of1ForFork2_~i~2_219 1) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2811) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2812) c_~A~0.base))) (let ((.cse1 (select .cse0 c_~A~0.offset))) (= (mod (+ (select .cse0 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_219 4))) c_~sum3~0 .cse1 c_~sum2~0) 4294967296) (mod (+ c_~sum1~0 .cse1 (select .cse0 (+ c_~A~0.offset 4))) 4294967296)))) (<= c_~N~0 v_thread3Thread1of1ForFork2_~i~2_219))) is different from false [2023-08-24 09:49:16,317 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:49:16,318 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 2 case distinctions, treesize of input 152 treesize of output 98 [2023-08-24 09:49:16,501 INFO L322 Elim1Store]: treesize reduction 8, result has 88.4 percent of original size [2023-08-24 09:49:16,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2536 treesize of output 2386 [2023-08-24 09:49:16,537 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:49:16,555 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:49:16,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 128 [2023-08-24 09:49:16,608 INFO L322 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-24 09:49:16,609 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 266 treesize of output 218 [2023-08-24 09:49:16,652 INFO L322 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-24 09:49:16,653 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 99 [2023-08-24 09:49:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:49:28,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814730378] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:49:28,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:49:28,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 09:49:28,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85486341] [2023-08-24 09:49:28,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:49:28,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 09:49:28,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:49:28,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 09:49:28,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1286, Unknown=3, NotChecked=150, Total=1640 [2023-08-24 09:49:28,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 09:49:28,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 2957 transitions, 73895 flow. Second operand has 41 states, 41 states have (on average 73.90243902439025) internal successors, (3030), 41 states have internal predecessors, (3030), 0 states have call successors, (0), 0 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 09:49:28,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:49:28,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 09:49:28,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:49:44,736 INFO L124 PetriNetUnfolderBase]: 13667/19720 cut-off events. [2023-08-24 09:49:44,736 INFO L125 PetriNetUnfolderBase]: For 740655/740655 co-relation queries the response was YES. [2023-08-24 09:49:44,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248745 conditions, 19720 events. 13667/19720 cut-off events. For 740655/740655 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 117469 event pairs, 1315 based on Foata normal form. 5/19725 useless extension candidates. Maximal degree in co-relation 248518. Up to 16155 conditions per place. [2023-08-24 09:49:45,091 INFO L140 encePairwiseOnDemand]: 279/294 looper letters, 2566 selfloop transitions, 945 changer transitions 5/3516 dead transitions. [2023-08-24 09:49:45,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 3516 transitions, 92900 flow [2023-08-24 09:49:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 09:49:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 09:49:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2212 transitions. [2023-08-24 09:49:45,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2786596119929453 [2023-08-24 09:49:45,093 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2212 transitions. [2023-08-24 09:49:45,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2212 transitions. [2023-08-24 09:49:45,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:49:45,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2212 transitions. [2023-08-24 09:49:45,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 81.92592592592592) internal successors, (2212), 27 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 09:49:45,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 294.0) internal successors, (8232), 28 states have internal predecessors, (8232), 0 states have call successors, (0), 0 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 09:49:45,099 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 294.0) internal successors, (8232), 28 states have internal predecessors, (8232), 0 states have call successors, (0), 0 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 09:49:45,099 INFO L175 Difference]: Start difference. First operand has 584 places, 2957 transitions, 73895 flow. Second operand 27 states and 2212 transitions. [2023-08-24 09:49:45,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 3516 transitions, 92900 flow [2023-08-24 09:49:59,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 3516 transitions, 88050 flow, removed 2086 selfloop flow, removed 12 redundant places. [2023-08-24 09:49:59,589 INFO L231 Difference]: Finished difference. Result has 614 places, 3282 transitions, 80730 flow [2023-08-24 09:49:59,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=69319, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2089, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=80730, PETRI_PLACES=614, PETRI_TRANSITIONS=3282} [2023-08-24 09:49:59,592 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 584 predicate places. [2023-08-24 09:49:59,592 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 3282 transitions, 80730 flow [2023-08-24 09:49:59,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 73.90243902439025) internal successors, (3030), 41 states have internal predecessors, (3030), 0 states have call successors, (0), 0 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 09:49:59,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:49:59,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:49:59,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-24 09:49:59,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-08-24 09:49:59,796 INFO L420 AbstractCegarLoop]: === Iteration 64 === 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 09:49:59,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:49:59,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1584820943, now seen corresponding path program 12 times [2023-08-24 09:49:59,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:49:59,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269796467] [2023-08-24 09:49:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:49:59,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:49:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:50:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:50:00,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:50:00,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269796467] [2023-08-24 09:50:00,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269796467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:50:00,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420950716] [2023-08-24 09:50:00,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:50:00,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:50:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:50:00,833 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:50:00,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-24 09:50:01,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:50:01,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:50:01,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 09:50:01,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:50:01,645 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:50:01,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:50:01,650 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:50:01,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 15 [2023-08-24 09:50:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:50:01,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:50:02,187 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:50:02,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 59 [2023-08-24 09:51:09,534 WARN L234 SmtUtils]: Spent 59.93s on a formula simplification. DAG size of input: 241 DAG size of output: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:51:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:12,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420950716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:12,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:12,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-24 09:51:12,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22525623] [2023-08-24 09:51:12,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:12,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 09:51:12,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 09:51:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 09:51:12,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 09:51:12,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 3282 transitions, 80730 flow. Second operand has 37 states, 37 states have (on average 74.10810810810811) internal successors, (2742), 37 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 09:51:12,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:12,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 09:51:12,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:35,996 INFO L124 PetriNetUnfolderBase]: 15758/22781 cut-off events. [2023-08-24 09:51:35,996 INFO L125 PetriNetUnfolderBase]: For 826069/826069 co-relation queries the response was YES. [2023-08-24 09:51:36,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282919 conditions, 22781 events. 15758/22781 cut-off events. For 826069/826069 co-relation queries the response was YES. Maximal size of possible extension queue 1087. Compared 138589 event pairs, 1430 based on Foata normal form. 5/22786 useless extension candidates. Maximal degree in co-relation 282676. Up to 16590 conditions per place. [2023-08-24 09:51:36,642 INFO L140 encePairwiseOnDemand]: 278/294 looper letters, 2549 selfloop transitions, 1529 changer transitions 13/4091 dead transitions. [2023-08-24 09:51:36,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 4091 transitions, 107381 flow [2023-08-24 09:51:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 09:51:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 09:51:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2709 transitions. [2023-08-24 09:51:36,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2792207792207792 [2023-08-24 09:51:36,645 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2709 transitions. [2023-08-24 09:51:36,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2709 transitions. [2023-08-24 09:51:36,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:36,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2709 transitions. [2023-08-24 09:51:36,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 82.0909090909091) internal successors, (2709), 33 states have internal predecessors, (2709), 0 states have call successors, (0), 0 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 09:51:36,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 294.0) internal successors, (9996), 34 states have internal predecessors, (9996), 0 states have call successors, (0), 0 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 09:51:36,652 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 294.0) internal successors, (9996), 34 states have internal predecessors, (9996), 0 states have call successors, (0), 0 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 09:51:36,652 INFO L175 Difference]: Start difference. First operand has 614 places, 3282 transitions, 80730 flow. Second operand 33 states and 2709 transitions. [2023-08-24 09:51:36,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 4091 transitions, 107381 flow [2023-08-24 09:51:55,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 4091 transitions, 104161 flow, removed 1470 selfloop flow, removed 7 redundant places. [2023-08-24 09:51:55,194 INFO L231 Difference]: Finished difference. Result has 661 places, 3767 transitions, 95771 flow [2023-08-24 09:51:55,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=78331, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2055, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=95771, PETRI_PLACES=661, PETRI_TRANSITIONS=3767} [2023-08-24 09:51:55,197 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 631 predicate places. [2023-08-24 09:51:55,197 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 3767 transitions, 95771 flow [2023-08-24 09:51:55,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 74.10810810810811) internal successors, (2742), 37 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 09:51:55,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:55,197 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:55,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-24 09:51:55,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:55,399 INFO L420 AbstractCegarLoop]: === Iteration 65 === 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 09:51:55,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash 142084707, now seen corresponding path program 21 times [2023-08-24 09:51:55,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:55,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982985092] [2023-08-24 09:51:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:55,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:56,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:56,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982985092] [2023-08-24 09:51:56,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982985092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:56,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169906406] [2023-08-24 09:51:56,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:51:56,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:56,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:56,230 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:51:56,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-24 09:51:56,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:51:56,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:56,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 09:51:56,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:57,204 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:51:57,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:51:57,205 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:51:57,210 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:51:57,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 17 [2023-08-24 09:51:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:51:57,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:57,647 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:51:57,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 51 [2023-08-24 09:51:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:51:59,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169906406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:59,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:59,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-08-24 09:51:59,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806247041] [2023-08-24 09:51:59,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:59,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 09:51:59,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 09:51:59,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 09:51:59,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 09:51:59,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 3767 transitions, 95771 flow. Second operand has 35 states, 35 states have (on average 84.2) internal successors, (2947), 35 states have internal predecessors, (2947), 0 states have call successors, (0), 0 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 09:51:59,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:59,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 09:51:59,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:22,102 INFO L124 PetriNetUnfolderBase]: 16745/24352 cut-off events. [2023-08-24 09:52:22,102 INFO L125 PetriNetUnfolderBase]: For 900902/900902 co-relation queries the response was YES. [2023-08-24 09:52:22,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308518 conditions, 24352 events. 16745/24352 cut-off events. For 900902/900902 co-relation queries the response was YES. Maximal size of possible extension queue 1193. Compared 151864 event pairs, 1698 based on Foata normal form. 2/24354 useless extension candidates. Maximal degree in co-relation 308252. Up to 20910 conditions per place. [2023-08-24 09:52:23,070 INFO L140 encePairwiseOnDemand]: 280/294 looper letters, 3424 selfloop transitions, 860 changer transitions 1/4285 dead transitions. [2023-08-24 09:52:23,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 4285 transitions, 116778 flow [2023-08-24 09:52:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 09:52:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 09:52:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2484 transitions. [2023-08-24 09:52:23,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3129251700680272 [2023-08-24 09:52:23,073 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2484 transitions. [2023-08-24 09:52:23,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2484 transitions. [2023-08-24 09:52:23,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:23,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2484 transitions. [2023-08-24 09:52:23,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 92.0) internal successors, (2484), 27 states have internal predecessors, (2484), 0 states have call successors, (0), 0 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 09:52:23,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 294.0) internal successors, (8232), 28 states have internal predecessors, (8232), 0 states have call successors, (0), 0 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 09:52:23,078 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 294.0) internal successors, (8232), 28 states have internal predecessors, (8232), 0 states have call successors, (0), 0 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 09:52:23,078 INFO L175 Difference]: Start difference. First operand has 661 places, 3767 transitions, 95771 flow. Second operand 27 states and 2484 transitions. [2023-08-24 09:52:23,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 4285 transitions, 116778 flow [2023-08-24 09:52:45,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 4285 transitions, 114279 flow, removed 1140 selfloop flow, removed 7 redundant places. [2023-08-24 09:52:45,469 INFO L231 Difference]: Finished difference. Result has 690 places, 3973 transitions, 101948 flow [2023-08-24 09:52:45,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=93282, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=677, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3055, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=101948, PETRI_PLACES=690, PETRI_TRANSITIONS=3973} [2023-08-24 09:52:45,471 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 660 predicate places. [2023-08-24 09:52:45,471 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 3973 transitions, 101948 flow [2023-08-24 09:52:45,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 84.2) internal successors, (2947), 35 states have internal predecessors, (2947), 0 states have call successors, (0), 0 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 09:52:45,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:45,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:45,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-24 09:52:45,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:45,672 INFO L420 AbstractCegarLoop]: === Iteration 66 === 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 09:52:45,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash -108378455, now seen corresponding path program 22 times [2023-08-24 09:52:45,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:45,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080542969] [2023-08-24 09:52:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:45,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:46,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:46,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080542969] [2023-08-24 09:52:46,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080542969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:46,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266599884] [2023-08-24 09:52:46,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:52:46,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:46,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:46,450 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:52:46,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-24 09:52:46,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:52:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:46,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 09:52:46,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:47,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:52:47,216 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:52:47,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:52:47,218 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:52:47,223 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:52:47,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 17 [2023-08-24 09:52:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:52:47,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:47,664 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:52:47,665 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 51 [2023-08-24 09:52:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:52:57,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266599884] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:57,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:57,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-08-24 09:52:57,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872405429] [2023-08-24 09:52:57,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:57,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 09:52:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 09:52:57,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1054, Unknown=1, NotChecked=0, Total=1190 [2023-08-24 09:52:57,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 09:52:57,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 3973 transitions, 101948 flow. Second operand has 35 states, 35 states have (on average 84.2) internal successors, (2947), 35 states have internal predecessors, (2947), 0 states have call successors, (0), 0 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 09:52:57,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:57,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 09:52:57,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:53:09,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:53:17,801 WARN L234 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 113 DAG size of output: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:53:24,423 WARN L234 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 78 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:53:27,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:53:32,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:53:39,704 WARN L234 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 75 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:53:56,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:54:04,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:54:10,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:54:17,712 INFO L124 PetriNetUnfolderBase]: 17559/25606 cut-off events. [2023-08-24 09:54:17,712 INFO L125 PetriNetUnfolderBase]: For 953456/953456 co-relation queries the response was YES. [2023-08-24 09:54:18,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325822 conditions, 25606 events. 17559/25606 cut-off events. For 953456/953456 co-relation queries the response was YES. Maximal size of possible extension queue 1224. Compared 161388 event pairs, 1760 based on Foata normal form. 2/25608 useless extension candidates. Maximal degree in co-relation 325545. Up to 21350 conditions per place. [2023-08-24 09:54:19,100 INFO L140 encePairwiseOnDemand]: 279/294 looper letters, 3444 selfloop transitions, 1051 changer transitions 6/4501 dead transitions. [2023-08-24 09:54:19,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 4501 transitions, 122234 flow [2023-08-24 09:54:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 09:54:19,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 09:54:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3466 transitions. [2023-08-24 09:54:19,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31023988542785536 [2023-08-24 09:54:19,103 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3466 transitions. [2023-08-24 09:54:19,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3466 transitions. [2023-08-24 09:54:19,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:54:19,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3466 transitions. [2023-08-24 09:54:19,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 91.21052631578948) internal successors, (3466), 38 states have internal predecessors, (3466), 0 states have call successors, (0), 0 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 09:54:19,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 294.0) internal successors, (11466), 39 states have internal predecessors, (11466), 0 states have call successors, (0), 0 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 09:54:19,114 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 294.0) internal successors, (11466), 39 states have internal predecessors, (11466), 0 states have call successors, (0), 0 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 09:54:19,115 INFO L175 Difference]: Start difference. First operand has 690 places, 3973 transitions, 101948 flow. Second operand 38 states and 3466 transitions. [2023-08-24 09:54:19,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 4501 transitions, 122234 flow [2023-08-24 09:54:42,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 4501 transitions, 118899 flow, removed 1407 selfloop flow, removed 11 redundant places. [2023-08-24 09:54:42,905 INFO L231 Difference]: Finished difference. Result has 730 places, 4152 transitions, 106613 flow [2023-08-24 09:54:42,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=98631, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=903, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2980, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=106613, PETRI_PLACES=730, PETRI_TRANSITIONS=4152} [2023-08-24 09:54:42,907 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 700 predicate places. [2023-08-24 09:54:42,907 INFO L495 AbstractCegarLoop]: Abstraction has has 730 places, 4152 transitions, 106613 flow [2023-08-24 09:54:42,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 84.2) internal successors, (2947), 35 states have internal predecessors, (2947), 0 states have call successors, (0), 0 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 09:54:42,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:54:42,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:54:42,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-08-24 09:54:43,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-08-24 09:54:43,108 INFO L420 AbstractCegarLoop]: === Iteration 67 === 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 09:54:43,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:54:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash 820664303, now seen corresponding path program 23 times [2023-08-24 09:54:43,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:54:43,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367387702] [2023-08-24 09:54:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:54:43,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:54:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:54:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:54:44,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:54:44,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367387702] [2023-08-24 09:54:44,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367387702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:54:44,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483175772] [2023-08-24 09:54:44,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:54:44,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:54:44,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:54:44,185 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:54:44,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-24 09:54:44,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:54:44,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:54:44,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 09:54:44,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:54:45,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:54:45,051 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:54:45,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:54:45,053 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:54:45,058 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:54:45,058 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 17 [2023-08-24 09:54:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:54:45,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:54:45,460 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:54:45,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 51 Received shutdown request... [2023-08-24 09:55:06,508 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 09:55:06,530 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 09:55:07,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-24 09:55:07,708 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-08-24 09:55:07,723 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 137 [2023-08-24 09:55:07,725 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-08-24 09:55:07,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2023-08-24 09:55:07,725 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:264) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:167) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:311) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:579) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-08-24 09:55:07,728 INFO L158 Benchmark]: Toolchain (without parser) took 783507.31ms. Allocated memory was 358.6MB in the beginning and 13.3GB in the end (delta: 13.0GB). Free memory was 334.6MB in the beginning and 7.6GB in the end (delta: -7.3GB). Peak memory consumption was 5.7GB. Max. memory is 16.0GB. [2023-08-24 09:55:07,728 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 358.6MB. Free memory is still 335.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 09:55:07,728 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.53ms. Allocated memory is still 358.6MB. Free memory was 334.6MB in the beginning and 323.3MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 09:55:07,729 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.94ms. Allocated memory is still 358.6MB. Free memory was 323.3MB in the beginning and 321.3MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-24 09:55:07,729 INFO L158 Benchmark]: Boogie Preprocessor took 34.29ms. Allocated memory is still 358.6MB. Free memory was 321.3MB in the beginning and 319.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 09:55:07,729 INFO L158 Benchmark]: RCFGBuilder took 449.43ms. Allocated memory is still 358.6MB. Free memory was 319.7MB in the beginning and 304.0MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-24 09:55:07,729 INFO L158 Benchmark]: TraceAbstraction took 782704.68ms. Allocated memory was 358.6MB in the beginning and 13.3GB in the end (delta: 13.0GB). Free memory was 303.0MB in the beginning and 7.6GB in the end (delta: -7.3GB). Peak memory consumption was 5.7GB. Max. memory is 16.0GB. [2023-08-24 09:55:07,730 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 358.6MB. Free memory is still 335.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 247.53ms. Allocated memory is still 358.6MB. Free memory was 334.6MB in the beginning and 323.3MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 54.94ms. Allocated memory is still 358.6MB. Free memory was 323.3MB in the beginning and 321.3MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.29ms. Allocated memory is still 358.6MB. Free memory was 321.3MB in the beginning and 319.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 449.43ms. Allocated memory is still 358.6MB. Free memory was 319.7MB in the beginning and 304.0MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 782704.68ms. Allocated memory was 358.6MB in the beginning and 13.3GB in the end (delta: 13.0GB). Free memory was 303.0MB in the beginning and 7.6GB in the end (delta: -7.3GB). Peak memory consumption was 5.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3s, 140 PlacesBefore, 30 PlacesAfterwards, 142 TransitionsBefore, 24 TransitionsAfterwards, 1950 CoEnabledTransitionPairs, 7 FixpointIterations, 71 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 139 TotalNumberOfCompositions, 2032 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1914, independent: 1894, independent conditional: 0, independent unconditional: 1894, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1038, independent: 1027, independent conditional: 0, independent unconditional: 1027, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1914, independent: 867, independent conditional: 0, independent unconditional: 867, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 1038, unknown conditional: 0, unknown unconditional: 1038] , Statistics on independence cache: Total cache size (in pairs): 54, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown