/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:21:19,433 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:21:19,505 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 00:21:19,509 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:21:19,510 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:21:19,541 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:21:19,542 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:21:19,543 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:21:19,543 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:21:19,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:21:19,547 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:21:19,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:21:19,547 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:21:19,549 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:21:19,549 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:21:19,549 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:21:19,549 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:21:19,549 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:21:19,550 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:21:19,550 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:21:19,550 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:21:19,551 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:21:19,551 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:21:19,552 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:21:19,552 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:21:19,552 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:21:19,552 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:21:19,552 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:21:19,553 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:21:19,553 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:21:19,554 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:21:19,554 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:21:19,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:21:19,554 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:21:19,554 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:21:19,554 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:21:19,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:21:19,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:21:19,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:21:19,847 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:21:19,847 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:21:19,849 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-24 00:21:21,067 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:21:21,306 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:21:21,307 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-24 00:21:21,314 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2001d4b7d/cd36e68caee9457db2f659974d040bb2/FLAGe5d08ee17 [2023-08-24 00:21:21,331 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2001d4b7d/cd36e68caee9457db2f659974d040bb2 [2023-08-24 00:21:21,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:21:21,338 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:21:21,341 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:21:21,341 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:21:21,344 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:21:21,346 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@735f7405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21, skipping insertion in model container [2023-08-24 00:21:21,347 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,370 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:21:21,539 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/array-eq-symm.wvr.c[2251,2264] [2023-08-24 00:21:21,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:21:21,566 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:21:21,591 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/array-eq-symm.wvr.c[2251,2264] [2023-08-24 00:21:21,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:21:21,619 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:21:21,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21 WrapperNode [2023-08-24 00:21:21,619 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:21:21,620 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:21:21,621 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:21:21,621 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:21:21,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,661 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 118 [2023-08-24 00:21:21,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:21:21,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:21:21,662 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:21:21,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:21:21,670 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,682 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,682 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,693 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,696 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,698 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,699 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,713 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:21:21,714 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:21:21,714 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:21:21,714 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:21:21,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (1/1) ... [2023-08-24 00:21:21,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:21:21,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:21,742 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 00:21:21,769 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 00:21:21,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:21:21,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 00:21:21,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 00:21:21,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 00:21:21,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 00:21:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:21:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:21:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:21:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 00:21:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:21:21,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:21:21,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:21:21,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:21:21,790 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 00:21:21,884 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:21:21,885 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:21:22,132 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:21:22,140 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:21:22,140 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 00:21:22,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:21:22 BoogieIcfgContainer [2023-08-24 00:21:22,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:21:22,144 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:21:22,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:21:22,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:21:22,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:21:21" (1/3) ... [2023-08-24 00:21:22,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ac3f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:21:22, skipping insertion in model container [2023-08-24 00:21:22,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:21:21" (2/3) ... [2023-08-24 00:21:22,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ac3f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:21:22, skipping insertion in model container [2023-08-24 00:21:22,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:21:22" (3/3) ... [2023-08-24 00:21:22,150 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-08-24 00:21:22,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:21:22,165 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 00:21:22,165 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:21:22,260 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 00:21:22,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 165 transitions, 346 flow [2023-08-24 00:21:22,398 INFO L124 PetriNetUnfolderBase]: 15/163 cut-off events. [2023-08-24 00:21:22,399 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 00:21:22,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 163 events. 15/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 123 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 124. Up to 3 conditions per place. [2023-08-24 00:21:22,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 165 transitions, 346 flow [2023-08-24 00:21:22,415 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 155 transitions, 322 flow [2023-08-24 00:21:22,419 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:21:22,447 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 155 transitions, 322 flow [2023-08-24 00:21:22,449 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 155 transitions, 322 flow [2023-08-24 00:21:22,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 155 transitions, 322 flow [2023-08-24 00:21:22,515 INFO L124 PetriNetUnfolderBase]: 15/155 cut-off events. [2023-08-24 00:21:22,515 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 00:21:22,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 155 events. 15/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 124. Up to 3 conditions per place. [2023-08-24 00:21:22,517 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-08-24 00:21:27,117 INFO L134 LiptonReduction]: Checked pairs total: 1284 [2023-08-24 00:21:27,118 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-08-24 00:21:27,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:21:27,135 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;@48f16e1a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:21:27,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 00:21:27,141 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:21:27,141 INFO L124 PetriNetUnfolderBase]: 5/18 cut-off events. [2023-08-24 00:21:27,141 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 00:21:27,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:27,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:27,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:27,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:27,147 INFO L85 PathProgramCache]: Analyzing trace with hash 836516662, now seen corresponding path program 1 times [2023-08-24 00:21:27,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:27,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738526766] [2023-08-24 00:21:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:27,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:27,593 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 00:21:27,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:27,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738526766] [2023-08-24 00:21:27,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738526766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:21:27,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:21:27,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 00:21:27,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984070860] [2023-08-24 00:21:27,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:21:27,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:21:27,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:27,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:21:27,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:21:27,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 338 [2023-08-24 00:21:27,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:27,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:27,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 338 [2023-08-24 00:21:27,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:27,728 INFO L124 PetriNetUnfolderBase]: 71/121 cut-off events. [2023-08-24 00:21:27,729 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-24 00:21:27,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 121 events. 71/121 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 277 event pairs, 15 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2023-08-24 00:21:27,733 INFO L140 encePairwiseOnDemand]: 334/338 looper letters, 27 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2023-08-24 00:21:27,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 31 transitions, 145 flow [2023-08-24 00:21:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:21:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:21:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-24 00:21:27,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339250493096647 [2023-08-24 00:21:27,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-24 00:21:27,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-24 00:21:27,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:27,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-24 00:21:27,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:27,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 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 00:21:27,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 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 00:21:27,778 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 50 flow. Second operand 3 states and 440 transitions. [2023-08-24 00:21:27,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 31 transitions, 145 flow [2023-08-24 00:21:27,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 00:21:27,782 INFO L231 Difference]: Finished difference. Result has 20 places, 21 transitions, 61 flow [2023-08-24 00:21:27,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=20, PETRI_TRANSITIONS=21} [2023-08-24 00:21:27,787 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-24 00:21:27,787 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 21 transitions, 61 flow [2023-08-24 00:21:27,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:27,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:27,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:27,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:21:27,789 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:27,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash -505257342, now seen corresponding path program 1 times [2023-08-24 00:21:27,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:27,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310386074] [2023-08-24 00:21:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:27,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:27,959 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 00:21:27,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:27,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310386074] [2023-08-24 00:21:27,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310386074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:21:27,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:21:27,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 00:21:27,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123048495] [2023-08-24 00:21:27,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:21:27,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 00:21:27,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:27,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 00:21:27,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 00:21:27,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:21:27,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 21 transitions, 61 flow. Second operand has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:27,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:27,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:21:27,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:28,052 INFO L124 PetriNetUnfolderBase]: 125/225 cut-off events. [2023-08-24 00:21:28,052 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-24 00:21:28,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 225 events. 125/225 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 685 event pairs, 71 based on Foata normal form. 16/213 useless extension candidates. Maximal degree in co-relation 200. Up to 122 conditions per place. [2023-08-24 00:21:28,054 INFO L140 encePairwiseOnDemand]: 334/338 looper letters, 36 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-24 00:21:28,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 186 flow [2023-08-24 00:21:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 00:21:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 00:21:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2023-08-24 00:21:28,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3646449704142012 [2023-08-24 00:21:28,057 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 493 transitions. [2023-08-24 00:21:28,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 493 transitions. [2023-08-24 00:21:28,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:28,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 493 transitions. [2023-08-24 00:21:28,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 338.0) internal successors, (1690), 5 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,062 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 338.0) internal successors, (1690), 5 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,062 INFO L175 Difference]: Start difference. First operand has 20 places, 21 transitions, 61 flow. Second operand 4 states and 493 transitions. [2023-08-24 00:21:28,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 186 flow [2023-08-24 00:21:28,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:21:28,064 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 80 flow [2023-08-24 00:21:28,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2023-08-24 00:21:28,065 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-08-24 00:21:28,065 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 80 flow [2023-08-24 00:21:28,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:28,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:28,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 00:21:28,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:28,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:28,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1414687405, now seen corresponding path program 1 times [2023-08-24 00:21:28,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:28,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363029220] [2023-08-24 00:21:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:28,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:28,189 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 00:21:28,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:28,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363029220] [2023-08-24 00:21:28,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363029220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:21:28,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:21:28,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 00:21:28,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224957480] [2023-08-24 00:21:28,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:21:28,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 00:21:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 00:21:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 00:21:28,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:21:28,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:28,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:21:28,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:28,276 INFO L124 PetriNetUnfolderBase]: 81/151 cut-off events. [2023-08-24 00:21:28,276 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-24 00:21:28,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 151 events. 81/151 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 397 event pairs, 45 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 294. Up to 122 conditions per place. [2023-08-24 00:21:28,278 INFO L140 encePairwiseOnDemand]: 334/338 looper letters, 20 selfloop transitions, 2 changer transitions 12/34 dead transitions. [2023-08-24 00:21:28,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 174 flow [2023-08-24 00:21:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 00:21:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 00:21:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-24 00:21:28,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36168639053254437 [2023-08-24 00:21:28,281 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-24 00:21:28,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-24 00:21:28,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:28,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-24 00:21:28,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 338.0) internal successors, (1690), 5 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,286 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 338.0) internal successors, (1690), 5 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,286 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 80 flow. Second operand 4 states and 489 transitions. [2023-08-24 00:21:28,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 174 flow [2023-08-24 00:21:28,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 168 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 00:21:28,288 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 74 flow [2023-08-24 00:21:28,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-08-24 00:21:28,288 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-08-24 00:21:28,289 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 74 flow [2023-08-24 00:21:28,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:28,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:28,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 00:21:28,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:28,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:28,290 INFO L85 PathProgramCache]: Analyzing trace with hash -84421152, now seen corresponding path program 1 times [2023-08-24 00:21:28,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:28,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714506797] [2023-08-24 00:21:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:28,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:28,374 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 00:21:28,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:28,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714506797] [2023-08-24 00:21:28,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714506797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:21:28,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:21:28,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 00:21:28,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538277913] [2023-08-24 00:21:28,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:21:28,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 00:21:28,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:28,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 00:21:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:21:28,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:21:28,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:28,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:21:28,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:28,479 INFO L124 PetriNetUnfolderBase]: 150/268 cut-off events. [2023-08-24 00:21:28,479 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-24 00:21:28,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 268 events. 150/268 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 861 event pairs, 70 based on Foata normal form. 16/281 useless extension candidates. Maximal degree in co-relation 639. Up to 106 conditions per place. [2023-08-24 00:21:28,484 INFO L140 encePairwiseOnDemand]: 333/338 looper letters, 43 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-08-24 00:21:28,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 248 flow [2023-08-24 00:21:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 00:21:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 00:21:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 616 transitions. [2023-08-24 00:21:28,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36449704142011835 [2023-08-24 00:21:28,487 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 616 transitions. [2023-08-24 00:21:28,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 616 transitions. [2023-08-24 00:21:28,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:28,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 616 transitions. [2023-08-24 00:21:28,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,494 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,494 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 74 flow. Second operand 5 states and 616 transitions. [2023-08-24 00:21:28,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 248 flow [2023-08-24 00:21:28,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 49 transitions, 236 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-24 00:21:28,498 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 103 flow [2023-08-24 00:21:28,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-08-24 00:21:28,500 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-24 00:21:28,500 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 103 flow [2023-08-24 00:21:28,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:28,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:28,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:28,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 00:21:28,501 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:28,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:28,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1253197181, now seen corresponding path program 1 times [2023-08-24 00:21:28,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:28,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472159071] [2023-08-24 00:21:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:28,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:28,683 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 00:21:28,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:28,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472159071] [2023-08-24 00:21:28,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472159071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:28,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921973686] [2023-08-24 00:21:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:28,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:28,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:28,693 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 00:21:28,699 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 00:21:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:28,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 00:21:28,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:28,927 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 00:21:28,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:21:29,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921973686] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:29,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 00:21:29,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-08-24 00:21:29,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044258279] [2023-08-24 00:21:29,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:21:29,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:21:29,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:29,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:21:29,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 00:21:29,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 338 [2023-08-24 00:21:29,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:29,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:29,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 338 [2023-08-24 00:21:29,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:29,208 INFO L124 PetriNetUnfolderBase]: 182/363 cut-off events. [2023-08-24 00:21:29,208 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2023-08-24 00:21:29,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 363 events. 182/363 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1476 event pairs, 50 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 900. Up to 117 conditions per place. [2023-08-24 00:21:29,210 INFO L140 encePairwiseOnDemand]: 330/338 looper letters, 43 selfloop transitions, 10 changer transitions 4/57 dead transitions. [2023-08-24 00:21:29,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 57 transitions, 314 flow [2023-08-24 00:21:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 00:21:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 00:21:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 831 transitions. [2023-08-24 00:21:29,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3512256973795435 [2023-08-24 00:21:29,214 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 831 transitions. [2023-08-24 00:21:29,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 831 transitions. [2023-08-24 00:21:29,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:29,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 831 transitions. [2023-08-24 00:21:29,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 118.71428571428571) internal successors, (831), 7 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:29,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 338.0) internal successors, (2704), 8 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:29,221 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 338.0) internal successors, (2704), 8 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:29,221 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 103 flow. Second operand 7 states and 831 transitions. [2023-08-24 00:21:29,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 57 transitions, 314 flow [2023-08-24 00:21:29,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 308 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:21:29,224 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 134 flow [2023-08-24 00:21:29,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-24 00:21:29,224 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-08-24 00:21:29,225 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 134 flow [2023-08-24 00:21:29,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:29,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:29,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:29,236 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 00:21:29,433 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 00:21:29,434 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:29,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:29,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1499269633, now seen corresponding path program 1 times [2023-08-24 00:21:29,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:29,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863992538] [2023-08-24 00:21:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:29,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:29,525 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 00:21:29,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:29,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863992538] [2023-08-24 00:21:29,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863992538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:21:29,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:21:29,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 00:21:29,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652988839] [2023-08-24 00:21:29,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:21:29,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 00:21:29,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:29,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 00:21:29,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:21:29,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:21:29,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:29,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:29,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:21:29,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:29,618 INFO L124 PetriNetUnfolderBase]: 134/262 cut-off events. [2023-08-24 00:21:29,618 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-08-24 00:21:29,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 262 events. 134/262 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 883 event pairs, 62 based on Foata normal form. 6/267 useless extension candidates. Maximal degree in co-relation 725. Up to 147 conditions per place. [2023-08-24 00:21:29,620 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 31 selfloop transitions, 5 changer transitions 10/46 dead transitions. [2023-08-24 00:21:29,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 276 flow [2023-08-24 00:21:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 00:21:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 00:21:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 613 transitions. [2023-08-24 00:21:29,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36272189349112427 [2023-08-24 00:21:29,622 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 613 transitions. [2023-08-24 00:21:29,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 613 transitions. [2023-08-24 00:21:29,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:29,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 613 transitions. [2023-08-24 00:21:29,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:29,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:29,627 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:29,627 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 134 flow. Second operand 5 states and 613 transitions. [2023-08-24 00:21:29,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 276 flow [2023-08-24 00:21:29,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 266 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 00:21:29,630 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 125 flow [2023-08-24 00:21:29,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-24 00:21:29,631 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-08-24 00:21:29,631 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 125 flow [2023-08-24 00:21:29,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:29,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:29,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:29,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 00:21:29,632 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:29,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash -972001140, now seen corresponding path program 1 times [2023-08-24 00:21:29,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:29,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591365726] [2023-08-24 00:21:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:29,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:21:30,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:30,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591365726] [2023-08-24 00:21:30,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591365726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:30,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559076788] [2023-08-24 00:21:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:30,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:30,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:30,364 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 00:21:30,394 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 00:21:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:30,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-24 00:21:30,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:30,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:21:30,775 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 00:21:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:21:30,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:30,998 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse0 (forall ((~B~0.base Int) (v_ArrVal_156 (Array Int Int))) (not (= |c_thread1Thread1of1ForFork0_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_156) ~B~0.base) .cse4)))))) (and (or (< c_~i_BA~0 c_~An~0) .cse0) (or (< c_~i_BA~0 c_~Bn~0) .cse0) (forall ((~B~0.base Int) (v_ArrVal_156 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_156))) (let ((.cse3 (select .cse1 ~B~0.base))) (or (let ((.cse2 (* c_~i_BA~0 4))) (= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2)) (select .cse3 (+ .cse2 c_~B~0.offset)))) (not (= |c_thread1Thread1of1ForFork0_#t~mem1| (select .cse3 .cse4)))))))))) is different from false [2023-08-24 00:21:31,016 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:31,016 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 48 treesize of output 36 [2023-08-24 00:21:31,020 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 24 treesize of output 18 [2023-08-24 00:21:31,041 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:31,041 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 48 treesize of output 36 [2023-08-24 00:21:31,046 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 24 treesize of output 18 [2023-08-24 00:21:31,121 INFO L322 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-24 00:21:31,122 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 146 treesize of output 151 [2023-08-24 00:21:31,149 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:31,150 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 90 treesize of output 92 [2023-08-24 00:21:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:21:31,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559076788] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:31,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 00:21:31,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 23 [2023-08-24 00:21:31,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797614901] [2023-08-24 00:21:31,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:21:31,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 00:21:31,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:31,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 00:21:31,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=432, Unknown=1, NotChecked=42, Total=552 [2023-08-24 00:21:31,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 338 [2023-08-24 00:21:31,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 125 flow. Second operand has 9 states, 9 states have (on average 85.88888888888889) internal successors, (773), 9 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:31,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:31,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 338 [2023-08-24 00:21:31,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:37,999 WARN L234 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 51 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 00:21:38,490 INFO L124 PetriNetUnfolderBase]: 136/252 cut-off events. [2023-08-24 00:21:38,491 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2023-08-24 00:21:38,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 252 events. 136/252 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 830 event pairs, 29 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 705. Up to 197 conditions per place. [2023-08-24 00:21:38,493 INFO L140 encePairwiseOnDemand]: 326/338 looper letters, 28 selfloop transitions, 15 changer transitions 5/48 dead transitions. [2023-08-24 00:21:38,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 287 flow [2023-08-24 00:21:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 00:21:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 00:21:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 802 transitions. [2023-08-24 00:21:38,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26364234056541747 [2023-08-24 00:21:38,497 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 802 transitions. [2023-08-24 00:21:38,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 802 transitions. [2023-08-24 00:21:38,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:38,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 802 transitions. [2023-08-24 00:21:38,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 89.11111111111111) internal successors, (802), 9 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 00:21:38,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:38,506 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:38,506 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 125 flow. Second operand 9 states and 802 transitions. [2023-08-24 00:21:38,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 287 flow [2023-08-24 00:21:38,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 275 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 00:21:38,510 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 211 flow [2023-08-24 00:21:38,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=211, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-08-24 00:21:38,510 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-08-24 00:21:38,511 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 211 flow [2023-08-24 00:21:38,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 85.88888888888889) internal successors, (773), 9 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:38,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:38,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:38,523 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 00:21:38,717 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,SelfDestructingSolverStorable6 [2023-08-24 00:21:38,717 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:38,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:38,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2094530800, now seen corresponding path program 2 times [2023-08-24 00:21:38,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:38,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670032001] [2023-08-24 00:21:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:38,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:21:39,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:39,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670032001] [2023-08-24 00:21:39,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670032001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:39,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644457810] [2023-08-24 00:21:39,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:21:39,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:39,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:39,254 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 00:21:39,256 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 00:21:39,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:21:39,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:21:39,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 00:21:39,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:21:39,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:39,759 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 00:21:39,759 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 47 treesize of output 80 [2023-08-24 00:21:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:21:39,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644457810] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:39,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 00:21:39,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-08-24 00:21:39,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896490869] [2023-08-24 00:21:39,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:21:39,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 00:21:39,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:39,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 00:21:39,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-24 00:21:39,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 338 [2023-08-24 00:21:39,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 94.125) internal successors, (753), 8 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:39,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:39,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 338 [2023-08-24 00:21:39,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:40,150 INFO L124 PetriNetUnfolderBase]: 128/242 cut-off events. [2023-08-24 00:21:40,150 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2023-08-24 00:21:40,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 242 events. 128/242 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 793 event pairs, 33 based on Foata normal form. 3/244 useless extension candidates. Maximal degree in co-relation 870. Up to 194 conditions per place. [2023-08-24 00:21:40,152 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 31 selfloop transitions, 9 changer transitions 9/49 dead transitions. [2023-08-24 00:21:40,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 49 transitions, 371 flow [2023-08-24 00:21:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 00:21:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 00:21:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 775 transitions. [2023-08-24 00:21:40,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28661242603550297 [2023-08-24 00:21:40,156 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 775 transitions. [2023-08-24 00:21:40,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 775 transitions. [2023-08-24 00:21:40,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:40,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 775 transitions. [2023-08-24 00:21:40,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.875) internal successors, (775), 8 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:40,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:40,162 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:40,162 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 211 flow. Second operand 8 states and 775 transitions. [2023-08-24 00:21:40,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 49 transitions, 371 flow [2023-08-24 00:21:40,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 355 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-24 00:21:40,167 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 229 flow [2023-08-24 00:21:40,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=229, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2023-08-24 00:21:40,170 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-08-24 00:21:40,170 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 229 flow [2023-08-24 00:21:40,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 94.125) internal successors, (753), 8 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:40,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:40,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:40,187 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 00:21:40,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:40,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:40,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:40,384 INFO L85 PathProgramCache]: Analyzing trace with hash 741084439, now seen corresponding path program 1 times [2023-08-24 00:21:40,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:40,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006135947] [2023-08-24 00:21:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:40,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:40,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:40,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006135947] [2023-08-24 00:21:40,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006135947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:21:40,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:21:40,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 00:21:40,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904007102] [2023-08-24 00:21:40,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:21:40,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:21:40,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:40,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:21:40,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:21:40,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:21:40,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 116.42857142857143) internal successors, (815), 7 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:40,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:40,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:21:40,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:40,894 INFO L124 PetriNetUnfolderBase]: 125/236 cut-off events. [2023-08-24 00:21:40,894 INFO L125 PetriNetUnfolderBase]: For 398/398 co-relation queries the response was YES. [2023-08-24 00:21:40,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 236 events. 125/236 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 748 event pairs, 34 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 940. Up to 198 conditions per place. [2023-08-24 00:21:40,896 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 32 selfloop transitions, 12 changer transitions 5/49 dead transitions. [2023-08-24 00:21:40,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 398 flow [2023-08-24 00:21:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 00:21:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 00:21:40,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 610 transitions. [2023-08-24 00:21:40,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3609467455621302 [2023-08-24 00:21:40,900 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 610 transitions. [2023-08-24 00:21:40,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 610 transitions. [2023-08-24 00:21:40,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:40,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 610 transitions. [2023-08-24 00:21:40,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:40,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:40,905 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:40,905 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 229 flow. Second operand 5 states and 610 transitions. [2023-08-24 00:21:40,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 398 flow [2023-08-24 00:21:40,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 49 transitions, 355 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-24 00:21:40,908 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 253 flow [2023-08-24 00:21:40,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-24 00:21:40,909 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-08-24 00:21:40,909 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 253 flow [2023-08-24 00:21:40,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.42857142857143) internal successors, (815), 7 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:40,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:40,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:40,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 00:21:40,910 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:40,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:40,910 INFO L85 PathProgramCache]: Analyzing trace with hash -547208590, now seen corresponding path program 3 times [2023-08-24 00:21:40,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:40,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823992718] [2023-08-24 00:21:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:40,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:41,412 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 00:21:41,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:41,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823992718] [2023-08-24 00:21:41,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823992718] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170214342] [2023-08-24 00:21:41,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 00:21:41,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:41,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:41,414 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 00:21:41,437 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 00:21:41,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 00:21:41,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:21:41,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 00:21:41,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:41,723 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 00:21:41,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:41,856 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 00:21:41,857 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 40 treesize of output 56 [2023-08-24 00:21:41,879 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:21:41,880 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 20 treesize of output 4 [2023-08-24 00:21:41,887 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:21:41,888 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 20 treesize of output 4 [2023-08-24 00:21:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:21:42,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170214342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:21:42,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:21:42,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-08-24 00:21:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000331052] [2023-08-24 00:21:42,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:21:42,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 00:21:42,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 00:21:42,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-08-24 00:21:42,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:21:42,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 253 flow. Second operand has 18 states, 18 states have (on average 89.88888888888889) internal successors, (1618), 18 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:42,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:42,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:21:42,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:42,338 INFO L124 PetriNetUnfolderBase]: 143/270 cut-off events. [2023-08-24 00:21:42,338 INFO L125 PetriNetUnfolderBase]: For 357/357 co-relation queries the response was YES. [2023-08-24 00:21:42,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 270 events. 143/270 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 921 event pairs, 16 based on Foata normal form. 12/281 useless extension candidates. Maximal degree in co-relation 1026. Up to 200 conditions per place. [2023-08-24 00:21:42,340 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 36 selfloop transitions, 17 changer transitions 0/53 dead transitions. [2023-08-24 00:21:42,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 421 flow [2023-08-24 00:21:42,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 00:21:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 00:21:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 838 transitions. [2023-08-24 00:21:42,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2754766600920447 [2023-08-24 00:21:42,344 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 838 transitions. [2023-08-24 00:21:42,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 838 transitions. [2023-08-24 00:21:42,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:42,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 838 transitions. [2023-08-24 00:21:42,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.11111111111111) internal successors, (838), 9 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 00:21:42,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:42,350 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:42,351 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 253 flow. Second operand 9 states and 838 transitions. [2023-08-24 00:21:42,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 421 flow [2023-08-24 00:21:42,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:21:42,354 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 301 flow [2023-08-24 00:21:42,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=301, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-08-24 00:21:42,355 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-08-24 00:21:42,356 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 301 flow [2023-08-24 00:21:42,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 89.88888888888889) internal successors, (1618), 18 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:42,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:42,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:42,365 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 00:21:42,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:42,563 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:42,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:42,563 INFO L85 PathProgramCache]: Analyzing trace with hash -851046999, now seen corresponding path program 2 times [2023-08-24 00:21:42,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:42,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329202220] [2023-08-24 00:21:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:42,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:42,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:42,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329202220] [2023-08-24 00:21:42,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329202220] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:42,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240567074] [2023-08-24 00:21:42,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:21:42,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:42,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:42,900 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 00:21:42,926 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 00:21:43,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:21:43,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:21:43,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 00:21:43,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:43,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:43,195 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 00:21:43,196 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 40 treesize of output 56 [2023-08-24 00:21:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:43,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240567074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:21:43,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:21:43,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-08-24 00:21:43,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263073353] [2023-08-24 00:21:43,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:21:43,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 00:21:43,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:43,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 00:21:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-24 00:21:43,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:21:43,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 301 flow. Second operand has 11 states, 11 states have (on average 116.9090909090909) internal successors, (1286), 11 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:43,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:43,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:21:43,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:43,397 INFO L124 PetriNetUnfolderBase]: 149/280 cut-off events. [2023-08-24 00:21:43,397 INFO L125 PetriNetUnfolderBase]: For 540/540 co-relation queries the response was YES. [2023-08-24 00:21:43,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193 conditions, 280 events. 149/280 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 968 event pairs, 32 based on Foata normal form. 4/284 useless extension candidates. Maximal degree in co-relation 1158. Up to 234 conditions per place. [2023-08-24 00:21:43,399 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2023-08-24 00:21:43,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 442 flow [2023-08-24 00:21:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 00:21:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 00:21:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 609 transitions. [2023-08-24 00:21:43,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3603550295857988 [2023-08-24 00:21:43,401 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 609 transitions. [2023-08-24 00:21:43,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 609 transitions. [2023-08-24 00:21:43,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:43,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 609 transitions. [2023-08-24 00:21:43,403 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 00:21:43,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:43,406 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:43,406 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 301 flow. Second operand 5 states and 609 transitions. [2023-08-24 00:21:43,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 442 flow [2023-08-24 00:21:43,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 419 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-24 00:21:43,409 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 316 flow [2023-08-24 00:21:43,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-08-24 00:21:43,410 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-08-24 00:21:43,410 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 316 flow [2023-08-24 00:21:43,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 116.9090909090909) internal successors, (1286), 11 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:43,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:43,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:43,420 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 00:21:43,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-24 00:21:43,616 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:43,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:43,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1689901343, now seen corresponding path program 3 times [2023-08-24 00:21:43,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:43,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626971278] [2023-08-24 00:21:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:43,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:44,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:44,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626971278] [2023-08-24 00:21:44,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626971278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:21:44,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:21:44,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 00:21:44,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226370045] [2023-08-24 00:21:44,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:21:44,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 00:21:44,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:44,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 00:21:44,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-24 00:21:44,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 338 [2023-08-24 00:21:44,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 316 flow. Second operand has 8 states, 8 states have (on average 108.125) internal successors, (865), 8 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:44,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:44,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 338 [2023-08-24 00:21:44,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:44,231 INFO L124 PetriNetUnfolderBase]: 145/276 cut-off events. [2023-08-24 00:21:44,232 INFO L125 PetriNetUnfolderBase]: For 675/675 co-relation queries the response was YES. [2023-08-24 00:21:44,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 276 events. 145/276 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 972 event pairs, 34 based on Foata normal form. 4/280 useless extension candidates. Maximal degree in co-relation 1146. Up to 240 conditions per place. [2023-08-24 00:21:44,234 INFO L140 encePairwiseOnDemand]: 333/338 looper letters, 33 selfloop transitions, 9 changer transitions 7/49 dead transitions. [2023-08-24 00:21:44,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 446 flow [2023-08-24 00:21:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 00:21:44,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 00:21:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 566 transitions. [2023-08-24 00:21:44,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3349112426035503 [2023-08-24 00:21:44,236 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 566 transitions. [2023-08-24 00:21:44,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 566 transitions. [2023-08-24 00:21:44,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:44,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 566 transitions. [2023-08-24 00:21:44,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:44,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:44,241 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:44,241 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 316 flow. Second operand 5 states and 566 transitions. [2023-08-24 00:21:44,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 446 flow [2023-08-24 00:21:44,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 425 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 00:21:44,245 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 288 flow [2023-08-24 00:21:44,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-08-24 00:21:44,247 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-08-24 00:21:44,247 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 288 flow [2023-08-24 00:21:44,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.125) internal successors, (865), 8 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:44,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:44,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:44,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 00:21:44,248 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:44,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2048774276, now seen corresponding path program 4 times [2023-08-24 00:21:44,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:44,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498660737] [2023-08-24 00:21:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:44,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:44,738 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 00:21:44,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:44,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498660737] [2023-08-24 00:21:44,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498660737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:44,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842509975] [2023-08-24 00:21:44,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 00:21:44,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:44,741 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 00:21:44,761 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 00:21:44,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 00:21:44,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:21:44,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 00:21:44,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:21:45,002 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 00:21:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:45,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:45,257 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse4 (forall ((v_ArrVal_347 (Array Int Int)) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_347) ~B~0.base) .cse3) |c_thread1Thread1of1ForFork0_#t~mem1|))))) (and (forall ((v_ArrVal_347 (Array Int Int)) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_347))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select .cse2 (+ .cse1 c_~B~0.offset)))) (not (= (select .cse2 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1|)))))) (or (< c_~i_BA~0 c_~Bn~0) .cse4) (or (< c_~i_BA~0 c_~An~0) .cse4)))) is different from false [2023-08-24 00:21:45,427 INFO L322 Elim1Store]: treesize reduction 22, result has 88.0 percent of original size [2023-08-24 00:21:45,427 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 251 treesize of output 308 [2023-08-24 00:21:45,461 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:45,462 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 147 treesize of output 150 [2023-08-24 00:21:45,478 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 117 treesize of output 111 [2023-08-24 00:21:45,494 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 111 treesize of output 105 [2023-08-24 00:21:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:47,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842509975] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:21:47,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:21:47,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-08-24 00:21:47,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419766282] [2023-08-24 00:21:47,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:21:47,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 00:21:47,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:47,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 00:21:47,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=286, Unknown=1, NotChecked=34, Total=380 [2023-08-24 00:21:47,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 338 [2023-08-24 00:21:47,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 288 flow. Second operand has 20 states, 20 states have (on average 86.15) internal successors, (1723), 20 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 00:21:47,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:47,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 338 [2023-08-24 00:21:47,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:48,677 INFO L124 PetriNetUnfolderBase]: 160/296 cut-off events. [2023-08-24 00:21:48,677 INFO L125 PetriNetUnfolderBase]: For 704/704 co-relation queries the response was YES. [2023-08-24 00:21:48,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 296 events. 160/296 cut-off events. For 704/704 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1050 event pairs, 12 based on Foata normal form. 12/308 useless extension candidates. Maximal degree in co-relation 1212. Up to 215 conditions per place. [2023-08-24 00:21:48,679 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-08-24 00:21:48,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 450 flow [2023-08-24 00:21:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 00:21:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 00:21:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 801 transitions. [2023-08-24 00:21:48,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26331360946745563 [2023-08-24 00:21:48,683 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 801 transitions. [2023-08-24 00:21:48,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 801 transitions. [2023-08-24 00:21:48,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:48,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 801 transitions. [2023-08-24 00:21:48,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 89.0) internal successors, (801), 9 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 00:21:48,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:48,689 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:48,689 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 288 flow. Second operand 9 states and 801 transitions. [2023-08-24 00:21:48,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 450 flow [2023-08-24 00:21:48,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 418 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-24 00:21:48,692 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 310 flow [2023-08-24 00:21:48,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=310, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-08-24 00:21:48,693 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-08-24 00:21:48,693 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 310 flow [2023-08-24 00:21:48,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 86.15) internal successors, (1723), 20 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 00:21:48,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:48,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:48,701 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 00:21:48,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:48,900 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:48,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1744935867, now seen corresponding path program 4 times [2023-08-24 00:21:48,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:48,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513095476] [2023-08-24 00:21:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:48,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:49,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:49,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513095476] [2023-08-24 00:21:49,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513095476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:49,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101810261] [2023-08-24 00:21:49,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 00:21:49,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:49,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:49,241 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 00:21:49,243 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 00:21:49,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 00:21:49,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:21:49,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 00:21:49,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:49,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:21:49,436 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 00:21:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:49,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:49,599 WARN L839 $PredicateComparison]: unable to prove that (forall ((~B~0.offset Int) (v_ArrVal_386 (Array Int Int)) (~B~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_386))) (let ((.cse0 (select .cse1 ~B~0.base))) (or (= (select .cse0 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork0_#t~mem1|) (not (let ((.cse2 (* c_~i_BA~0 4))) (= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2)) (select .cse0 (+ .cse2 ~B~0.offset))))))))) is different from false [2023-08-24 00:21:49,641 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:49,641 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 148 treesize of output 168 [2023-08-24 00:21:49,667 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:49,667 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 84 treesize of output 86 [2023-08-24 00:21:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:50,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101810261] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:21:50,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:21:50,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2023-08-24 00:21:50,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646703678] [2023-08-24 00:21:50,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:21:50,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 00:21:50,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:50,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 00:21:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=250, Unknown=1, NotChecked=32, Total=342 [2023-08-24 00:21:50,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 338 [2023-08-24 00:21:50,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 310 flow. Second operand has 19 states, 19 states have (on average 112.26315789473684) internal successors, (2133), 19 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:50,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:50,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 338 [2023-08-24 00:21:50,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:50,585 INFO L124 PetriNetUnfolderBase]: 166/306 cut-off events. [2023-08-24 00:21:50,585 INFO L125 PetriNetUnfolderBase]: For 882/882 co-relation queries the response was YES. [2023-08-24 00:21:50,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1389 conditions, 306 events. 166/306 cut-off events. For 882/882 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1067 event pairs, 49 based on Foata normal form. 4/310 useless extension candidates. Maximal degree in co-relation 1355. Up to 268 conditions per place. [2023-08-24 00:21:50,588 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 35 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2023-08-24 00:21:50,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 47 transitions, 451 flow [2023-08-24 00:21:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:21:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:21:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 694 transitions. [2023-08-24 00:21:50,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3422090729783038 [2023-08-24 00:21:50,591 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 694 transitions. [2023-08-24 00:21:50,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 694 transitions. [2023-08-24 00:21:50,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:50,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 694 transitions. [2023-08-24 00:21:50,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 115.66666666666667) internal successors, (694), 6 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:50,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 338.0) internal successors, (2366), 7 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:50,609 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 338.0) internal successors, (2366), 7 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:50,609 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 310 flow. Second operand 6 states and 694 transitions. [2023-08-24 00:21:50,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 47 transitions, 451 flow [2023-08-24 00:21:50,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 421 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-24 00:21:50,613 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 322 flow [2023-08-24 00:21:50,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-24 00:21:50,613 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-08-24 00:21:50,613 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 322 flow [2023-08-24 00:21:50,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 112.26315789473684) internal successors, (2133), 19 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:50,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:50,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:50,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 00:21:50,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:50,815 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:50,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash -898591860, now seen corresponding path program 5 times [2023-08-24 00:21:50,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:50,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866707530] [2023-08-24 00:21:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:50,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:51,435 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 00:21:51,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866707530] [2023-08-24 00:21:51,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866707530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12379830] [2023-08-24 00:21:51,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 00:21:51,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:51,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:51,437 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 00:21:51,459 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 00:21:51,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:21:51,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:21:51,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 00:21:51,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:51,645 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 00:21:51,699 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 00:21:51,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:21:51,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:21:51,882 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 00:21:51,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-08-24 00:21:51,915 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 00:21:51,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:52,201 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:52,201 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 106 treesize of output 70 [2023-08-24 00:21:52,260 INFO L322 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-24 00:21:52,260 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 924 treesize of output 825 [2023-08-24 00:21:52,283 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:52,284 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 342 treesize of output 254 [2023-08-24 00:21:52,326 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:52,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 316 treesize of output 308 [2023-08-24 00:21:53,836 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:53,837 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 50 treesize of output 39 [2023-08-24 00:21:53,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:21:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:21:53,848 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 65 [2023-08-24 00:21:53,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:21:53,862 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-08-24 00:21:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:21:53,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12379830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:21:53,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:21:53,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2023-08-24 00:21:53,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43686931] [2023-08-24 00:21:53,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:21:53,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 00:21:53,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 00:21:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=424, Unknown=7, NotChecked=0, Total=506 [2023-08-24 00:21:53,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 338 [2023-08-24 00:21:53,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 322 flow. Second operand has 23 states, 23 states have (on average 81.69565217391305) internal successors, (1879), 23 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:53,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:53,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 338 [2023-08-24 00:21:53,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:54,640 INFO L124 PetriNetUnfolderBase]: 205/365 cut-off events. [2023-08-24 00:21:54,641 INFO L125 PetriNetUnfolderBase]: For 1291/1291 co-relation queries the response was YES. [2023-08-24 00:21:54,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 365 events. 205/365 cut-off events. For 1291/1291 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1353 event pairs, 15 based on Foata normal form. 20/385 useless extension candidates. Maximal degree in co-relation 1626. Up to 189 conditions per place. [2023-08-24 00:21:54,644 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 43 selfloop transitions, 20 changer transitions 0/63 dead transitions. [2023-08-24 00:21:54,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 571 flow [2023-08-24 00:21:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 00:21:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 00:21:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 771 transitions. [2023-08-24 00:21:54,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2534516765285996 [2023-08-24 00:21:54,652 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 771 transitions. [2023-08-24 00:21:54,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 771 transitions. [2023-08-24 00:21:54,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:54,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 771 transitions. [2023-08-24 00:21:54,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 85.66666666666667) internal successors, (771), 9 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:54,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:54,658 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:54,658 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 322 flow. Second operand 9 states and 771 transitions. [2023-08-24 00:21:54,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 571 flow [2023-08-24 00:21:54,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-24 00:21:54,664 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 400 flow [2023-08-24 00:21:54,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=400, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-24 00:21:54,665 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-08-24 00:21:54,665 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 400 flow [2023-08-24 00:21:54,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.69565217391305) internal successors, (1879), 23 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:54,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:54,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:54,675 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 00:21:54,872 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,SelfDestructingSolverStorable14 [2023-08-24 00:21:54,872 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:54,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:54,873 INFO L85 PathProgramCache]: Analyzing trace with hash -493459047, now seen corresponding path program 5 times [2023-08-24 00:21:54,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:54,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680614005] [2023-08-24 00:21:54,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:54,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:55,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680614005] [2023-08-24 00:21:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680614005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389099891] [2023-08-24 00:21:55,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 00:21:55,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:55,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:55,105 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 00:21:55,131 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 00:21:55,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:21:55,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:21:55,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 00:21:55,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:55,288 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 00:21:55,328 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 00:21:55,363 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 00:21:55,410 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 00:21:55,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:55,543 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:55,544 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 112 treesize of output 76 [2023-08-24 00:21:55,597 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 00:21:55,598 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 828 treesize of output 748 [2023-08-24 00:21:55,621 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:21:55,625 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:21:55,647 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:55,648 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 700 treesize of output 556 [2023-08-24 00:21:55,663 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:21:55,667 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:21:55,689 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:21:55,690 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 508 treesize of output 460 [2023-08-24 00:21:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:21:57,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389099891] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:21:57,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:21:57,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2023-08-24 00:21:57,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864102179] [2023-08-24 00:21:57,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:21:57,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 00:21:57,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 00:21:57,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=220, Unknown=10, NotChecked=0, Total=306 [2023-08-24 00:21:57,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 338 [2023-08-24 00:21:57,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 400 flow. Second operand has 18 states, 18 states have (on average 94.16666666666667) internal successors, (1695), 18 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:57,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:57,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 338 [2023-08-24 00:21:57,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:57,736 INFO L124 PetriNetUnfolderBase]: 195/345 cut-off events. [2023-08-24 00:21:57,737 INFO L125 PetriNetUnfolderBase]: For 1518/1518 co-relation queries the response was YES. [2023-08-24 00:21:57,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 345 events. 195/345 cut-off events. For 1518/1518 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1232 event pairs, 38 based on Foata normal form. 4/349 useless extension candidates. Maximal degree in co-relation 1747. Up to 289 conditions per place. [2023-08-24 00:21:57,743 INFO L140 encePairwiseOnDemand]: 330/338 looper letters, 38 selfloop transitions, 15 changer transitions 0/53 dead transitions. [2023-08-24 00:21:57,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 563 flow [2023-08-24 00:21:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 00:21:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 00:21:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2023-08-24 00:21:57,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2878275570583263 [2023-08-24 00:21:57,747 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2023-08-24 00:21:57,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2023-08-24 00:21:57,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:57,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2023-08-24 00:21:57,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:57,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 338.0) internal successors, (2704), 8 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:57,754 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 338.0) internal successors, (2704), 8 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:57,754 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 400 flow. Second operand 7 states and 681 transitions. [2023-08-24 00:21:57,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 563 flow [2023-08-24 00:21:57,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 513 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-24 00:21:57,758 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 384 flow [2023-08-24 00:21:57,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-24 00:21:57,760 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-08-24 00:21:57,760 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 384 flow [2023-08-24 00:21:57,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.16666666666667) internal successors, (1695), 18 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:57,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:57,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:57,769 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 00:21:57,966 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,SelfDestructingSolverStorable15 [2023-08-24 00:21:57,967 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:57,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:57,967 INFO L85 PathProgramCache]: Analyzing trace with hash 159285392, now seen corresponding path program 1 times [2023-08-24 00:21:57,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:57,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491769869] [2023-08-24 00:21:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:57,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:58,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:58,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491769869] [2023-08-24 00:21:58,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491769869] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:58,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370789832] [2023-08-24 00:21:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:58,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:58,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:58,107 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 00:21:58,133 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 00:21:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:58,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 00:21:58,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:58,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:58,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370789832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:21:58,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:21:58,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-24 00:21:58,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297452310] [2023-08-24 00:21:58,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:21:58,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:21:58,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:58,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:21:58,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:21:58,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 338 [2023-08-24 00:21:58,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 384 flow. Second operand has 7 states, 7 states have (on average 141.28571428571428) internal successors, (989), 7 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:58,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:58,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 338 [2023-08-24 00:21:58,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:58,503 INFO L124 PetriNetUnfolderBase]: 300/546 cut-off events. [2023-08-24 00:21:58,503 INFO L125 PetriNetUnfolderBase]: For 1972/1972 co-relation queries the response was YES. [2023-08-24 00:21:58,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2598 conditions, 546 events. 300/546 cut-off events. For 1972/1972 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2257 event pairs, 26 based on Foata normal form. 4/550 useless extension candidates. Maximal degree in co-relation 2561. Up to 263 conditions per place. [2023-08-24 00:21:58,508 INFO L140 encePairwiseOnDemand]: 334/338 looper letters, 69 selfloop transitions, 18 changer transitions 2/89 dead transitions. [2023-08-24 00:21:58,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 814 flow [2023-08-24 00:21:58,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 00:21:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 00:21:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1020 transitions. [2023-08-24 00:21:58,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43110735418427726 [2023-08-24 00:21:58,511 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1020 transitions. [2023-08-24 00:21:58,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1020 transitions. [2023-08-24 00:21:58,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:58,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1020 transitions. [2023-08-24 00:21:58,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 145.71428571428572) internal successors, (1020), 7 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:58,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 338.0) internal successors, (2704), 8 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:58,516 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 338.0) internal successors, (2704), 8 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:58,516 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 384 flow. Second operand 7 states and 1020 transitions. [2023-08-24 00:21:58,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 814 flow [2023-08-24 00:21:58,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 777 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-24 00:21:58,521 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 481 flow [2023-08-24 00:21:58,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=481, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-08-24 00:21:58,521 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 39 predicate places. [2023-08-24 00:21:58,521 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 481 flow [2023-08-24 00:21:58,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.28571428571428) internal successors, (989), 7 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:58,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:58,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:58,533 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 00:21:58,733 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,SelfDestructingSolverStorable16 [2023-08-24 00:21:58,734 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:58,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash -116581616, now seen corresponding path program 2 times [2023-08-24 00:21:58,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:58,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668428048] [2023-08-24 00:21:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:58,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:58,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668428048] [2023-08-24 00:21:58,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668428048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416796732] [2023-08-24 00:21:58,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:21:58,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:58,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:58,853 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 00:21:58,873 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 00:21:58,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:21:58,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:21:58,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 00:21:58,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:59,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 00:21:59,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416796732] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:21:59,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:21:59,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-24 00:21:59,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103443462] [2023-08-24 00:21:59,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:21:59,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:21:59,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:21:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:21:59,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 338 [2023-08-24 00:21:59,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 481 flow. Second operand has 7 states, 7 states have (on average 141.28571428571428) internal successors, (989), 7 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:59,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:59,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 338 [2023-08-24 00:21:59,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:21:59,305 INFO L124 PetriNetUnfolderBase]: 420/762 cut-off events. [2023-08-24 00:21:59,305 INFO L125 PetriNetUnfolderBase]: For 3620/3620 co-relation queries the response was YES. [2023-08-24 00:21:59,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3844 conditions, 762 events. 420/762 cut-off events. For 3620/3620 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3495 event pairs, 95 based on Foata normal form. 4/766 useless extension candidates. Maximal degree in co-relation 3807. Up to 546 conditions per place. [2023-08-24 00:21:59,311 INFO L140 encePairwiseOnDemand]: 334/338 looper letters, 74 selfloop transitions, 18 changer transitions 2/94 dead transitions. [2023-08-24 00:21:59,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 931 flow [2023-08-24 00:21:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 00:21:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 00:21:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1015 transitions. [2023-08-24 00:21:59,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289940828402367 [2023-08-24 00:21:59,314 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1015 transitions. [2023-08-24 00:21:59,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1015 transitions. [2023-08-24 00:21:59,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:21:59,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1015 transitions. [2023-08-24 00:21:59,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:59,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 338.0) internal successors, (2704), 8 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:59,318 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 338.0) internal successors, (2704), 8 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:59,318 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 481 flow. Second operand 7 states and 1015 transitions. [2023-08-24 00:21:59,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 931 flow [2023-08-24 00:21:59,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 905 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-24 00:21:59,325 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 613 flow [2023-08-24 00:21:59,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=613, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2023-08-24 00:21:59,325 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-08-24 00:21:59,325 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 613 flow [2023-08-24 00:21:59,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.28571428571428) internal successors, (989), 7 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:59,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:21:59,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:21:59,332 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 00:21:59,531 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,SelfDestructingSolverStorable17 [2023-08-24 00:21:59,532 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:21:59,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:21:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 585762354, now seen corresponding path program 3 times [2023-08-24 00:21:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:21:59,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995499515] [2023-08-24 00:21:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:21:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:21:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:21:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:59,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:21:59,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995499515] [2023-08-24 00:21:59,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995499515] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:21:59,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483327373] [2023-08-24 00:21:59,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 00:21:59,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:21:59,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:21:59,628 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 00:21:59,631 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 00:21:59,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 00:21:59,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:21:59,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 00:21:59,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:21:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:59,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:21:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:21:59,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483327373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:21:59,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:21:59,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-08-24 00:21:59,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527263555] [2023-08-24 00:21:59,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:21:59,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 00:21:59,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:21:59,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 00:21:59,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-24 00:21:59,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 338 [2023-08-24 00:21:59,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 613 flow. Second operand has 15 states, 15 states have (on average 114.0) internal successors, (1710), 15 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:21:59,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:21:59,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 338 [2023-08-24 00:21:59,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:00,337 INFO L124 PetriNetUnfolderBase]: 1147/2220 cut-off events. [2023-08-24 00:22:00,338 INFO L125 PetriNetUnfolderBase]: For 11573/11573 co-relation queries the response was YES. [2023-08-24 00:22:00,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11513 conditions, 2220 events. 1147/2220 cut-off events. For 11573/11573 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13953 event pairs, 484 based on Foata normal form. 168/2388 useless extension candidates. Maximal degree in co-relation 11083. Up to 760 conditions per place. [2023-08-24 00:22:00,357 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 170 selfloop transitions, 50 changer transitions 3/223 dead transitions. [2023-08-24 00:22:00,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 223 transitions, 2518 flow [2023-08-24 00:22:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 00:22:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 00:22:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1761 transitions. [2023-08-24 00:22:00,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3473372781065089 [2023-08-24 00:22:00,361 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1761 transitions. [2023-08-24 00:22:00,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1761 transitions. [2023-08-24 00:22:00,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:00,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1761 transitions. [2023-08-24 00:22:00,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 117.4) internal successors, (1761), 15 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:00,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 338.0) internal successors, (5408), 16 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:00,370 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 338.0) internal successors, (5408), 16 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:00,370 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 613 flow. Second operand 15 states and 1761 transitions. [2023-08-24 00:22:00,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 223 transitions, 2518 flow [2023-08-24 00:22:00,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 223 transitions, 2417 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-08-24 00:22:00,388 INFO L231 Difference]: Finished difference. Result has 87 places, 110 transitions, 1308 flow [2023-08-24 00:22:00,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1308, PETRI_PLACES=87, PETRI_TRANSITIONS=110} [2023-08-24 00:22:00,389 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 66 predicate places. [2023-08-24 00:22:00,389 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 110 transitions, 1308 flow [2023-08-24 00:22:00,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.0) internal successors, (1710), 15 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:00,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:00,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:00,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 00:22:00,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:00,599 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:00,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:00,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1893381655, now seen corresponding path program 4 times [2023-08-24 00:22:00,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:00,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174071222] [2023-08-24 00:22:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:00,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:22:00,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:00,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174071222] [2023-08-24 00:22:00,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174071222] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:00,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490604436] [2023-08-24 00:22:00,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 00:22:00,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:00,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:00,698 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 00:22:00,718 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 00:22:00,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 00:22:00,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:00,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 00:22:00,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:22:00,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:22:00,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490604436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:00,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:00,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-24 00:22:00,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479678342] [2023-08-24 00:22:00,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:00,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:22:00,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:00,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:22:00,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-24 00:22:00,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:22:00,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 110 transitions, 1308 flow. Second operand has 13 states, 13 states have (on average 117.07692307692308) internal successors, (1522), 13 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:00,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:00,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:22:00,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:01,169 INFO L124 PetriNetUnfolderBase]: 799/1552 cut-off events. [2023-08-24 00:22:01,169 INFO L125 PetriNetUnfolderBase]: For 9860/9860 co-relation queries the response was YES. [2023-08-24 00:22:01,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8465 conditions, 1552 events. 799/1552 cut-off events. For 9860/9860 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9025 event pairs, 444 based on Foata normal form. 36/1588 useless extension candidates. Maximal degree in co-relation 8092. Up to 1247 conditions per place. [2023-08-24 00:22:01,183 INFO L140 encePairwiseOnDemand]: 333/338 looper letters, 77 selfloop transitions, 3 changer transitions 44/124 dead transitions. [2023-08-24 00:22:01,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 1602 flow [2023-08-24 00:22:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:22:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:22:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 726 transitions. [2023-08-24 00:22:01,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35798816568047337 [2023-08-24 00:22:01,185 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 726 transitions. [2023-08-24 00:22:01,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 726 transitions. [2023-08-24 00:22:01,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:01,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 726 transitions. [2023-08-24 00:22:01,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.0) internal successors, (726), 6 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:01,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 338.0) internal successors, (2366), 7 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:01,188 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 338.0) internal successors, (2366), 7 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:01,188 INFO L175 Difference]: Start difference. First operand has 87 places, 110 transitions, 1308 flow. Second operand 6 states and 726 transitions. [2023-08-24 00:22:01,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 1602 flow [2023-08-24 00:22:01,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 124 transitions, 1573 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-24 00:22:01,216 INFO L231 Difference]: Finished difference. Result has 91 places, 80 transitions, 866 flow [2023-08-24 00:22:01,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=866, PETRI_PLACES=91, PETRI_TRANSITIONS=80} [2023-08-24 00:22:01,217 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 70 predicate places. [2023-08-24 00:22:01,217 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 80 transitions, 866 flow [2023-08-24 00:22:01,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 117.07692307692308) internal successors, (1522), 13 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:01,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:01,218 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:01,228 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 00:22:01,425 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,SelfDestructingSolverStorable19 [2023-08-24 00:22:01,425 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:01,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:01,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1351727393, now seen corresponding path program 5 times [2023-08-24 00:22:01,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:01,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832249751] [2023-08-24 00:22:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:01,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 00:22:01,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:01,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832249751] [2023-08-24 00:22:01,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832249751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:01,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961981962] [2023-08-24 00:22:01,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 00:22:01,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:01,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:01,613 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 00:22:01,614 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 00:22:01,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:22:01,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:01,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 00:22:01,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:01,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:01,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961981962] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:01,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:01,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2023-08-24 00:22:01,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118347950] [2023-08-24 00:22:01,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:01,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 00:22:01,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:01,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 00:22:01,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-08-24 00:22:01,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 338 [2023-08-24 00:22:01,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 80 transitions, 866 flow. Second operand has 17 states, 17 states have (on average 108.82352941176471) internal successors, (1850), 17 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:01,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:01,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 338 [2023-08-24 00:22:01,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:02,788 INFO L124 PetriNetUnfolderBase]: 749/1424 cut-off events. [2023-08-24 00:22:02,788 INFO L125 PetriNetUnfolderBase]: For 9205/9205 co-relation queries the response was YES. [2023-08-24 00:22:02,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7757 conditions, 1424 events. 749/1424 cut-off events. For 9205/9205 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7747 event pairs, 46 based on Foata normal form. 46/1470 useless extension candidates. Maximal degree in co-relation 7709. Up to 484 conditions per place. [2023-08-24 00:22:02,803 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 132 selfloop transitions, 65 changer transitions 23/220 dead transitions. [2023-08-24 00:22:02,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 220 transitions, 2459 flow [2023-08-24 00:22:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 00:22:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 00:22:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2689 transitions. [2023-08-24 00:22:02,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33148422090729784 [2023-08-24 00:22:02,807 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2689 transitions. [2023-08-24 00:22:02,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2689 transitions. [2023-08-24 00:22:02,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:02,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2689 transitions. [2023-08-24 00:22:02,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 112.04166666666667) internal successors, (2689), 24 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:02,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 338.0) internal successors, (8450), 25 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:02,819 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 338.0) internal successors, (8450), 25 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:02,819 INFO L175 Difference]: Start difference. First operand has 91 places, 80 transitions, 866 flow. Second operand 24 states and 2689 transitions. [2023-08-24 00:22:02,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 220 transitions, 2459 flow [2023-08-24 00:22:02,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 220 transitions, 2357 flow, removed 48 selfloop flow, removed 8 redundant places. [2023-08-24 00:22:02,838 INFO L231 Difference]: Finished difference. Result has 104 places, 113 transitions, 1357 flow [2023-08-24 00:22:02,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1357, PETRI_PLACES=104, PETRI_TRANSITIONS=113} [2023-08-24 00:22:02,838 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2023-08-24 00:22:02,839 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 113 transitions, 1357 flow [2023-08-24 00:22:02,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 108.82352941176471) internal successors, (1850), 17 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:02,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:02,839 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:02,849 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 00:22:03,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:03,045 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:03,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash -81234191, now seen corresponding path program 6 times [2023-08-24 00:22:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:03,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850529506] [2023-08-24 00:22:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:03,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 00:22:03,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850529506] [2023-08-24 00:22:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850529506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315582643] [2023-08-24 00:22:03,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 00:22:03,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:03,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:03,147 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 00:22:03,172 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 00:22:03,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 00:22:03,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:03,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 00:22:03,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 00:22:03,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 00:22:03,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315582643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:03,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:03,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-24 00:22:03,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547510507] [2023-08-24 00:22:03,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:03,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 00:22:03,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:03,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 00:22:03,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-24 00:22:03,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:22:03,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 113 transitions, 1357 flow. Second operand has 15 states, 15 states have (on average 116.73333333333333) internal successors, (1751), 15 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:03,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:03,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:22:03,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:03,613 INFO L124 PetriNetUnfolderBase]: 538/1010 cut-off events. [2023-08-24 00:22:03,614 INFO L125 PetriNetUnfolderBase]: For 7879/7879 co-relation queries the response was YES. [2023-08-24 00:22:03,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6105 conditions, 1010 events. 538/1010 cut-off events. For 7879/7879 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4902 event pairs, 160 based on Foata normal form. 18/1028 useless extension candidates. Maximal degree in co-relation 6052. Up to 838 conditions per place. [2023-08-24 00:22:03,623 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 79 selfloop transitions, 13 changer transitions 28/120 dead transitions. [2023-08-24 00:22:03,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 120 transitions, 1583 flow [2023-08-24 00:22:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 00:22:03,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 00:22:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 955 transitions. [2023-08-24 00:22:03,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531804733727811 [2023-08-24 00:22:03,625 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 955 transitions. [2023-08-24 00:22:03,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 955 transitions. [2023-08-24 00:22:03,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:03,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 955 transitions. [2023-08-24 00:22:03,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.375) internal successors, (955), 8 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:03,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:03,629 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:03,629 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 1357 flow. Second operand 8 states and 955 transitions. [2023-08-24 00:22:03,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 120 transitions, 1583 flow [2023-08-24 00:22:03,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 120 transitions, 1497 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-08-24 00:22:03,650 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 916 flow [2023-08-24 00:22:03,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=916, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2023-08-24 00:22:03,650 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-08-24 00:22:03,650 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 916 flow [2023-08-24 00:22:03,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 116.73333333333333) internal successors, (1751), 15 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:03,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:03,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:03,664 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 00:22:03,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:03,863 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:03,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1714594140, now seen corresponding path program 7 times [2023-08-24 00:22:03,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:03,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525301688] [2023-08-24 00:22:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:03,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:04,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525301688] [2023-08-24 00:22:04,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525301688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:04,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718804196] [2023-08-24 00:22:04,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 00:22:04,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:04,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:04,424 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 00:22:04,426 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 00:22:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:04,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 00:22:04,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:04,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:05,042 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:22:05,043 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 20 treesize of output 4 [2023-08-24 00:22:05,090 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:22:05,090 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 42 treesize of output 60 [2023-08-24 00:22:05,109 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:22:05,109 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 20 treesize of output 4 [2023-08-24 00:22:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:05,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718804196] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:05,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:05,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-08-24 00:22:05,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71253565] [2023-08-24 00:22:05,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:05,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 00:22:05,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 00:22:05,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2023-08-24 00:22:05,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:22:05,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 88 transitions, 916 flow. Second operand has 32 states, 32 states have (on average 89.875) internal successors, (2876), 32 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:05,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:05,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:22:05,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:05,925 INFO L124 PetriNetUnfolderBase]: 544/999 cut-off events. [2023-08-24 00:22:05,925 INFO L125 PetriNetUnfolderBase]: For 7780/7780 co-relation queries the response was YES. [2023-08-24 00:22:05,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5815 conditions, 999 events. 544/999 cut-off events. For 7780/7780 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4913 event pairs, 116 based on Foata normal form. 12/1011 useless extension candidates. Maximal degree in co-relation 5764. Up to 778 conditions per place. [2023-08-24 00:22:05,940 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 90 selfloop transitions, 33 changer transitions 0/123 dead transitions. [2023-08-24 00:22:05,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 123 transitions, 1433 flow [2023-08-24 00:22:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 00:22:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 00:22:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1206 transitions. [2023-08-24 00:22:05,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27446517979062357 [2023-08-24 00:22:05,942 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1206 transitions. [2023-08-24 00:22:05,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1206 transitions. [2023-08-24 00:22:05,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:05,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1206 transitions. [2023-08-24 00:22:05,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 92.76923076923077) internal successors, (1206), 13 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:05,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 338.0) internal successors, (4732), 14 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:05,947 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 338.0) internal successors, (4732), 14 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:05,947 INFO L175 Difference]: Start difference. First operand has 101 places, 88 transitions, 916 flow. Second operand 13 states and 1206 transitions. [2023-08-24 00:22:05,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 123 transitions, 1433 flow [2023-08-24 00:22:05,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 123 transitions, 1379 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-08-24 00:22:05,966 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 1114 flow [2023-08-24 00:22:05,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1114, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2023-08-24 00:22:05,966 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 82 predicate places. [2023-08-24 00:22:05,966 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 1114 flow [2023-08-24 00:22:05,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 89.875) internal successors, (2876), 32 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:05,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:05,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:05,979 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 00:22:06,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-24 00:22:06,173 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:06,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:06,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1780485487, now seen corresponding path program 1 times [2023-08-24 00:22:06,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:06,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210604999] [2023-08-24 00:22:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:06,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:06,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:06,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210604999] [2023-08-24 00:22:06,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210604999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:06,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099193844] [2023-08-24 00:22:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:06,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:06,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:06,726 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 00:22:06,729 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 00:22:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:06,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 00:22:06,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 00:22:06,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:07,072 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:22:07,073 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 42 treesize of output 60 [2023-08-24 00:22:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:07,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099193844] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:07,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:07,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 19 [2023-08-24 00:22:07,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409325208] [2023-08-24 00:22:07,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:07,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 00:22:07,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:07,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 00:22:07,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-24 00:22:07,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 338 [2023-08-24 00:22:07,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 99 transitions, 1114 flow. Second operand has 20 states, 20 states have (on average 104.6) internal successors, (2092), 20 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:07,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:07,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 338 [2023-08-24 00:22:07,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:07,637 INFO L124 PetriNetUnfolderBase]: 551/1029 cut-off events. [2023-08-24 00:22:07,637 INFO L125 PetriNetUnfolderBase]: For 9931/9931 co-relation queries the response was YES. [2023-08-24 00:22:07,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6400 conditions, 1029 events. 551/1029 cut-off events. For 9931/9931 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5153 event pairs, 122 based on Foata normal form. 8/1037 useless extension candidates. Maximal degree in co-relation 6345. Up to 761 conditions per place. [2023-08-24 00:22:07,645 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 100 selfloop transitions, 33 changer transitions 20/153 dead transitions. [2023-08-24 00:22:07,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 153 transitions, 1788 flow [2023-08-24 00:22:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 00:22:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 00:22:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1417 transitions. [2023-08-24 00:22:07,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3224852071005917 [2023-08-24 00:22:07,651 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1417 transitions. [2023-08-24 00:22:07,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1417 transitions. [2023-08-24 00:22:07,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:07,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1417 transitions. [2023-08-24 00:22:07,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 109.0) internal successors, (1417), 13 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:07,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 338.0) internal successors, (4732), 14 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:07,657 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 338.0) internal successors, (4732), 14 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:07,657 INFO L175 Difference]: Start difference. First operand has 103 places, 99 transitions, 1114 flow. Second operand 13 states and 1417 transitions. [2023-08-24 00:22:07,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 153 transitions, 1788 flow [2023-08-24 00:22:07,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 153 transitions, 1707 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-24 00:22:07,680 INFO L231 Difference]: Finished difference. Result has 109 places, 102 transitions, 1149 flow [2023-08-24 00:22:07,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1149, PETRI_PLACES=109, PETRI_TRANSITIONS=102} [2023-08-24 00:22:07,681 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 88 predicate places. [2023-08-24 00:22:07,681 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 102 transitions, 1149 flow [2023-08-24 00:22:07,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 104.6) internal successors, (2092), 20 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:07,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:07,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:07,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 00:22:07,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:07,888 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:07,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:07,888 INFO L85 PathProgramCache]: Analyzing trace with hash -304016577, now seen corresponding path program 2 times [2023-08-24 00:22:07,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:07,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859427945] [2023-08-24 00:22:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:07,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:08,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:08,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859427945] [2023-08-24 00:22:08,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859427945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:08,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390228171] [2023-08-24 00:22:08,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:22:08,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:08,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:08,291 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 00:22:08,314 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 00:22:08,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:22:08,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:08,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 00:22:08,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:08,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:08,636 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:22:08,637 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 42 treesize of output 60 [2023-08-24 00:22:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:08,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390228171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:08,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:08,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2023-08-24 00:22:08,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453511669] [2023-08-24 00:22:08,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:08,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 00:22:08,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:08,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 00:22:08,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-24 00:22:08,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:22:08,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 102 transitions, 1149 flow. Second operand has 20 states, 20 states have (on average 116.4) internal successors, (2328), 20 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:08,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:08,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:22:08,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:09,798 INFO L124 PetriNetUnfolderBase]: 569/1049 cut-off events. [2023-08-24 00:22:09,799 INFO L125 PetriNetUnfolderBase]: For 10378/10378 co-relation queries the response was YES. [2023-08-24 00:22:09,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6562 conditions, 1049 events. 569/1049 cut-off events. For 10378/10378 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5221 event pairs, 115 based on Foata normal form. 12/1061 useless extension candidates. Maximal degree in co-relation 6505. Up to 755 conditions per place. [2023-08-24 00:22:09,805 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 107 selfloop transitions, 45 changer transitions 2/154 dead transitions. [2023-08-24 00:22:09,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 154 transitions, 1933 flow [2023-08-24 00:22:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 00:22:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 00:22:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1689 transitions. [2023-08-24 00:22:09,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35693153000845307 [2023-08-24 00:22:09,807 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1689 transitions. [2023-08-24 00:22:09,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1689 transitions. [2023-08-24 00:22:09,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:09,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1689 transitions. [2023-08-24 00:22:09,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 120.64285714285714) internal successors, (1689), 14 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 00:22:09,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:09,812 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:09,812 INFO L175 Difference]: Start difference. First operand has 109 places, 102 transitions, 1149 flow. Second operand 14 states and 1689 transitions. [2023-08-24 00:22:09,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 154 transitions, 1933 flow [2023-08-24 00:22:09,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 154 transitions, 1863 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-24 00:22:09,830 INFO L231 Difference]: Finished difference. Result has 119 places, 114 transitions, 1354 flow [2023-08-24 00:22:09,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1354, PETRI_PLACES=119, PETRI_TRANSITIONS=114} [2023-08-24 00:22:09,830 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 98 predicate places. [2023-08-24 00:22:09,830 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 114 transitions, 1354 flow [2023-08-24 00:22:09,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 116.4) internal successors, (2328), 20 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:09,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:09,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:09,837 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 00:22:10,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:10,037 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:10,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:10,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1747983981, now seen corresponding path program 3 times [2023-08-24 00:22:10,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:10,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959010331] [2023-08-24 00:22:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:10,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:10,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:10,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959010331] [2023-08-24 00:22:10,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959010331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:10,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425504715] [2023-08-24 00:22:10,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 00:22:10,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:10,373 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 00:22:10,400 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 00:22:10,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 00:22:10,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:10,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 00:22:10,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:10,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:22:10,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:22:10,536 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-24 00:22:10,537 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-24 00:22:10,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-24 00:22:10,636 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:22:10,637 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 11 treesize of output 11 [2023-08-24 00:22:10,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 00:22:10,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 00:22:10,778 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 00:22:10,816 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 00:22:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:10,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:11,519 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:22:11,519 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 90 [2023-08-24 00:22:11,586 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:22:11,586 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 3436 treesize of output 3216 [2023-08-24 00:22:11,630 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:22:11,631 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:22:11,651 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:22:11,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 3164 treesize of output 3006 [2023-08-24 00:22:11,691 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:22:11,692 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:22:11,713 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:22:11,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2956 treesize of output 2174 [2023-08-24 00:22:11,755 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:22:11,756 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:22:11,777 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:22:11,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2124 treesize of output 1758 [2023-08-24 00:22:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:22:21,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425504715] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:21,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:21,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 31 [2023-08-24 00:22:21,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665993227] [2023-08-24 00:22:21,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:21,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 00:22:21,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:21,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 00:22:21,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=840, Unknown=9, NotChecked=0, Total=992 [2023-08-24 00:22:21,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 338 [2023-08-24 00:22:21,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 114 transitions, 1354 flow. Second operand has 32 states, 32 states have (on average 82.6875) internal successors, (2646), 32 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 00:22:21,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:21,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 338 [2023-08-24 00:22:21,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:26,040 INFO L124 PetriNetUnfolderBase]: 1110/2101 cut-off events. [2023-08-24 00:22:26,040 INFO L125 PetriNetUnfolderBase]: For 25019/25019 co-relation queries the response was YES. [2023-08-24 00:22:26,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13833 conditions, 2101 events. 1110/2101 cut-off events. For 25019/25019 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12703 event pairs, 171 based on Foata normal form. 24/2125 useless extension candidates. Maximal degree in co-relation 13772. Up to 894 conditions per place. [2023-08-24 00:22:26,057 INFO L140 encePairwiseOnDemand]: 328/338 looper letters, 191 selfloop transitions, 127 changer transitions 14/332 dead transitions. [2023-08-24 00:22:26,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 332 transitions, 4324 flow [2023-08-24 00:22:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 00:22:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 00:22:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2953 transitions. [2023-08-24 00:22:26,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2569613644274278 [2023-08-24 00:22:26,063 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2953 transitions. [2023-08-24 00:22:26,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2953 transitions. [2023-08-24 00:22:26,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:26,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2953 transitions. [2023-08-24 00:22:26,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 86.8529411764706) internal successors, (2953), 34 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:26,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 338.0) internal successors, (11830), 35 states have internal predecessors, (11830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:26,076 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 338.0) internal successors, (11830), 35 states have internal predecessors, (11830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:26,076 INFO L175 Difference]: Start difference. First operand has 119 places, 114 transitions, 1354 flow. Second operand 34 states and 2953 transitions. [2023-08-24 00:22:26,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 332 transitions, 4324 flow [2023-08-24 00:22:26,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 332 transitions, 4149 flow, removed 34 selfloop flow, removed 7 redundant places. [2023-08-24 00:22:26,133 INFO L231 Difference]: Finished difference. Result has 156 places, 211 transitions, 3101 flow [2023-08-24 00:22:26,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3101, PETRI_PLACES=156, PETRI_TRANSITIONS=211} [2023-08-24 00:22:26,134 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2023-08-24 00:22:26,134 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 211 transitions, 3101 flow [2023-08-24 00:22:26,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 82.6875) internal successors, (2646), 32 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 00:22:26,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:26,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:26,141 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 00:22:26,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:26,341 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:26,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:26,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1439919946, now seen corresponding path program 8 times [2023-08-24 00:22:26,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:26,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954694198] [2023-08-24 00:22:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:26,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:26,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:26,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954694198] [2023-08-24 00:22:26,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954694198] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:26,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140221505] [2023-08-24 00:22:26,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:22:26,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:26,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:26,973 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 00:22:26,979 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 00:22:27,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:22:27,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:27,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-24 00:22:27,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:27,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:27,683 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:22:27,684 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 20 treesize of output 4 [2023-08-24 00:22:27,720 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:22:27,720 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 42 treesize of output 60 [2023-08-24 00:22:27,735 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:22:27,736 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 20 treesize of output 4 [2023-08-24 00:22:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:27,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140221505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:27,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:27,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-24 00:22:27,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000358516] [2023-08-24 00:22:27,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:27,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 00:22:27,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 00:22:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 00:22:27,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:22:27,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 211 transitions, 3101 flow. Second operand has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:27,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:27,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:22:27,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:28,752 INFO L124 PetriNetUnfolderBase]: 1084/2048 cut-off events. [2023-08-24 00:22:28,753 INFO L125 PetriNetUnfolderBase]: For 26958/26958 co-relation queries the response was YES. [2023-08-24 00:22:28,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14447 conditions, 2048 events. 1084/2048 cut-off events. For 26958/26958 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12193 event pairs, 284 based on Foata normal form. 4/2052 useless extension candidates. Maximal degree in co-relation 14372. Up to 1860 conditions per place. [2023-08-24 00:22:28,769 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 168 selfloop transitions, 53 changer transitions 2/223 dead transitions. [2023-08-24 00:22:28,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 223 transitions, 3607 flow [2023-08-24 00:22:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 00:22:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 00:22:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1287 transitions. [2023-08-24 00:22:28,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27197802197802196 [2023-08-24 00:22:28,772 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1287 transitions. [2023-08-24 00:22:28,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1287 transitions. [2023-08-24 00:22:28,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:28,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1287 transitions. [2023-08-24 00:22:28,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 91.92857142857143) internal successors, (1287), 14 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:28,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:28,778 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:28,778 INFO L175 Difference]: Start difference. First operand has 156 places, 211 transitions, 3101 flow. Second operand 14 states and 1287 transitions. [2023-08-24 00:22:28,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 223 transitions, 3607 flow [2023-08-24 00:22:28,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 223 transitions, 3198 flow, removed 175 selfloop flow, removed 9 redundant places. [2023-08-24 00:22:28,874 INFO L231 Difference]: Finished difference. Result has 159 places, 211 transitions, 2810 flow [2023-08-24 00:22:28,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2810, PETRI_PLACES=159, PETRI_TRANSITIONS=211} [2023-08-24 00:22:28,875 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 138 predicate places. [2023-08-24 00:22:28,875 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 211 transitions, 2810 flow [2023-08-24 00:22:28,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:28,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:28,876 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:28,882 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 00:22:29,082 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,SelfDestructingSolverStorable26 [2023-08-24 00:22:29,082 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:29,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:29,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1995578174, now seen corresponding path program 9 times [2023-08-24 00:22:29,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:29,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347046492] [2023-08-24 00:22:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:29,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:29,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:29,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347046492] [2023-08-24 00:22:29,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347046492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:29,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056814657] [2023-08-24 00:22:29,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 00:22:29,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:29,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:29,709 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 00:22:29,732 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 00:22:30,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 00:22:30,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:30,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 00:22:30,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:30,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:30,452 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:22:30,452 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 42 treesize of output 60 [2023-08-24 00:22:30,472 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:22:30,472 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 20 treesize of output 4 [2023-08-24 00:22:30,478 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:22:30,478 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 20 treesize of output 4 [2023-08-24 00:22:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:30,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056814657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:30,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:30,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2023-08-24 00:22:30,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185565665] [2023-08-24 00:22:30,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:30,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 00:22:30,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:30,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 00:22:30,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2023-08-24 00:22:30,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:22:30,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 211 transitions, 2810 flow. Second operand has 30 states, 30 states have (on average 89.6) internal successors, (2688), 30 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:30,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:30,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:22:30,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:31,469 INFO L124 PetriNetUnfolderBase]: 1106/2086 cut-off events. [2023-08-24 00:22:31,470 INFO L125 PetriNetUnfolderBase]: For 23952/23952 co-relation queries the response was YES. [2023-08-24 00:22:31,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13795 conditions, 2086 events. 1106/2086 cut-off events. For 23952/23952 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12468 event pairs, 282 based on Foata normal form. 48/2134 useless extension candidates. Maximal degree in co-relation 13722. Up to 1772 conditions per place. [2023-08-24 00:22:31,485 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 184 selfloop transitions, 72 changer transitions 7/263 dead transitions. [2023-08-24 00:22:31,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 263 transitions, 3782 flow [2023-08-24 00:22:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 00:22:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 00:22:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1577 transitions. [2023-08-24 00:22:31,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27445179255134006 [2023-08-24 00:22:31,488 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1577 transitions. [2023-08-24 00:22:31,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1577 transitions. [2023-08-24 00:22:31,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:31,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1577 transitions. [2023-08-24 00:22:31,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.76470588235294) internal successors, (1577), 17 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:31,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 338.0) internal successors, (6084), 18 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:31,495 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 338.0) internal successors, (6084), 18 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:31,495 INFO L175 Difference]: Start difference. First operand has 159 places, 211 transitions, 2810 flow. Second operand 17 states and 1577 transitions. [2023-08-24 00:22:31,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 263 transitions, 3782 flow [2023-08-24 00:22:31,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 263 transitions, 3650 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-08-24 00:22:31,564 INFO L231 Difference]: Finished difference. Result has 163 places, 219 transitions, 2988 flow [2023-08-24 00:22:31,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2988, PETRI_PLACES=163, PETRI_TRANSITIONS=219} [2023-08-24 00:22:31,564 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-08-24 00:22:31,564 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 219 transitions, 2988 flow [2023-08-24 00:22:31,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 89.6) internal successors, (2688), 30 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:31,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:31,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:31,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-24 00:22:31,770 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,SelfDestructingSolverStorable27 [2023-08-24 00:22:31,771 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:31,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash -51691395, now seen corresponding path program 4 times [2023-08-24 00:22:31,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:31,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151877604] [2023-08-24 00:22:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:31,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:32,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:32,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151877604] [2023-08-24 00:22:32,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151877604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:32,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446495732] [2023-08-24 00:22:32,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 00:22:32,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:32,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:32,089 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 00:22:32,115 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 00:22:32,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 00:22:32,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:32,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 00:22:32,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:32,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:32,436 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 00:22:32,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-24 00:22:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 00:22:32,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446495732] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:32,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:32,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 17 [2023-08-24 00:22:32,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547308784] [2023-08-24 00:22:32,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:32,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 00:22:32,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:32,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 00:22:32,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-24 00:22:32,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:22:32,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 219 transitions, 2988 flow. Second operand has 18 states, 18 states have (on average 116.55555555555556) internal successors, (2098), 18 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:32,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:32,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:22:32,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:33,100 INFO L124 PetriNetUnfolderBase]: 1113/2100 cut-off events. [2023-08-24 00:22:33,100 INFO L125 PetriNetUnfolderBase]: For 25895/25895 co-relation queries the response was YES. [2023-08-24 00:22:33,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14323 conditions, 2100 events. 1113/2100 cut-off events. For 25895/25895 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12556 event pairs, 227 based on Foata normal form. 12/2112 useless extension candidates. Maximal degree in co-relation 14249. Up to 1514 conditions per place. [2023-08-24 00:22:33,115 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 170 selfloop transitions, 78 changer transitions 15/263 dead transitions. [2023-08-24 00:22:33,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 263 transitions, 3829 flow [2023-08-24 00:22:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:22:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:22:33,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1459 transitions. [2023-08-24 00:22:33,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35971400394477315 [2023-08-24 00:22:33,117 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1459 transitions. [2023-08-24 00:22:33,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1459 transitions. [2023-08-24 00:22:33,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:33,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1459 transitions. [2023-08-24 00:22:33,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 121.58333333333333) internal successors, (1459), 12 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 00:22:33,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 338.0) internal successors, (4394), 13 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:33,121 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 338.0) internal successors, (4394), 13 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:33,121 INFO L175 Difference]: Start difference. First operand has 163 places, 219 transitions, 2988 flow. Second operand 12 states and 1459 transitions. [2023-08-24 00:22:33,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 263 transitions, 3829 flow [2023-08-24 00:22:33,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 263 transitions, 3650 flow, removed 19 selfloop flow, removed 13 redundant places. [2023-08-24 00:22:33,180 INFO L231 Difference]: Finished difference. Result has 163 places, 221 transitions, 3005 flow [2023-08-24 00:22:33,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3005, PETRI_PLACES=163, PETRI_TRANSITIONS=221} [2023-08-24 00:22:33,181 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-08-24 00:22:33,181 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 221 transitions, 3005 flow [2023-08-24 00:22:33,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 116.55555555555556) internal successors, (2098), 18 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:33,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:33,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:33,187 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 00:22:33,383 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,SelfDestructingSolverStorable28 [2023-08-24 00:22:33,383 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:33,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 813869501, now seen corresponding path program 5 times [2023-08-24 00:22:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:33,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567701417] [2023-08-24 00:22:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:33,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:33,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:33,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567701417] [2023-08-24 00:22:33,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567701417] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:33,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874909180] [2023-08-24 00:22:33,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 00:22:33,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:33,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:33,701 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 00:22:33,709 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 00:22:33,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 00:22:33,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:33,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 00:22:33,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:33,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:34,036 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 00:22:34,037 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 40 treesize of output 56 [2023-08-24 00:22:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:34,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874909180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:34,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:34,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 15 [2023-08-24 00:22:34,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752914193] [2023-08-24 00:22:34,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:34,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 00:22:34,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:34,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 00:22:34,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-08-24 00:22:34,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:22:34,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 221 transitions, 3005 flow. Second operand has 16 states, 16 states have (on average 116.5625) internal successors, (1865), 16 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:34,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:34,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:22:34,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:34,726 INFO L124 PetriNetUnfolderBase]: 1141/2141 cut-off events. [2023-08-24 00:22:34,726 INFO L125 PetriNetUnfolderBase]: For 26616/26616 co-relation queries the response was YES. [2023-08-24 00:22:34,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14736 conditions, 2141 events. 1141/2141 cut-off events. For 26616/26616 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12752 event pairs, 134 based on Foata normal form. 8/2149 useless extension candidates. Maximal degree in co-relation 14662. Up to 1368 conditions per place. [2023-08-24 00:22:34,743 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 190 selfloop transitions, 88 changer transitions 3/281 dead transitions. [2023-08-24 00:22:34,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 281 transitions, 4177 flow [2023-08-24 00:22:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 00:22:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 00:22:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1699 transitions. [2023-08-24 00:22:34,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35904480135249367 [2023-08-24 00:22:34,745 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1699 transitions. [2023-08-24 00:22:34,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1699 transitions. [2023-08-24 00:22:34,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:34,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1699 transitions. [2023-08-24 00:22:34,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 121.35714285714286) internal successors, (1699), 14 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:34,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:34,751 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:34,752 INFO L175 Difference]: Start difference. First operand has 163 places, 221 transitions, 3005 flow. Second operand 14 states and 1699 transitions. [2023-08-24 00:22:34,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 281 transitions, 4177 flow [2023-08-24 00:22:34,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 281 transitions, 4019 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-24 00:22:34,836 INFO L231 Difference]: Finished difference. Result has 171 places, 226 transitions, 3122 flow [2023-08-24 00:22:34,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3122, PETRI_PLACES=171, PETRI_TRANSITIONS=226} [2023-08-24 00:22:34,836 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2023-08-24 00:22:34,836 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 226 transitions, 3122 flow [2023-08-24 00:22:34,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 116.5625) internal successors, (1865), 16 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:34,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:34,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:34,845 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 00:22:35,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:35,043 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:35,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1690011804, now seen corresponding path program 10 times [2023-08-24 00:22:35,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:35,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818077571] [2023-08-24 00:22:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:35,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:35,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:35,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818077571] [2023-08-24 00:22:35,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818077571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:35,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808260253] [2023-08-24 00:22:35,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 00:22:35,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:35,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:35,569 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 00:22:35,590 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 00:22:35,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 00:22:35,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:35,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 00:22:35,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:35,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:36,000 INFO L322 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-08-24 00:22:36,000 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 47 treesize of output 67 [2023-08-24 00:22:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:36,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808260253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:36,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:36,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-08-24 00:22:36,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956459727] [2023-08-24 00:22:36,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:36,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 00:22:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 00:22:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-08-24 00:22:36,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:22:36,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 226 transitions, 3122 flow. Second operand has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:36,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:36,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:22:36,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:36,893 INFO L124 PetriNetUnfolderBase]: 1156/2192 cut-off events. [2023-08-24 00:22:36,893 INFO L125 PetriNetUnfolderBase]: For 29004/29004 co-relation queries the response was YES. [2023-08-24 00:22:36,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15248 conditions, 2192 events. 1156/2192 cut-off events. For 29004/29004 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13318 event pairs, 194 based on Foata normal form. 6/2198 useless extension candidates. Maximal degree in co-relation 15169. Up to 1322 conditions per place. [2023-08-24 00:22:36,914 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 189 selfloop transitions, 94 changer transitions 15/298 dead transitions. [2023-08-24 00:22:36,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 298 transitions, 4385 flow [2023-08-24 00:22:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 00:22:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 00:22:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1773 transitions. [2023-08-24 00:22:36,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27608221737776395 [2023-08-24 00:22:36,918 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1773 transitions. [2023-08-24 00:22:36,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1773 transitions. [2023-08-24 00:22:36,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:36,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1773 transitions. [2023-08-24 00:22:36,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 93.3157894736842) internal successors, (1773), 19 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:36,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 338.0) internal successors, (6760), 20 states have internal predecessors, (6760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:36,925 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 338.0) internal successors, (6760), 20 states have internal predecessors, (6760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:36,925 INFO L175 Difference]: Start difference. First operand has 171 places, 226 transitions, 3122 flow. Second operand 19 states and 1773 transitions. [2023-08-24 00:22:36,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 298 transitions, 4385 flow [2023-08-24 00:22:37,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 298 transitions, 4229 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-24 00:22:37,010 INFO L231 Difference]: Finished difference. Result has 186 places, 237 transitions, 3423 flow [2023-08-24 00:22:37,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3423, PETRI_PLACES=186, PETRI_TRANSITIONS=237} [2023-08-24 00:22:37,011 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2023-08-24 00:22:37,011 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 237 transitions, 3423 flow [2023-08-24 00:22:37,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:37,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:37,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:37,018 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 00:22:37,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:37,218 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:37,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:37,218 INFO L85 PathProgramCache]: Analyzing trace with hash -359755430, now seen corresponding path program 11 times [2023-08-24 00:22:37,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:37,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739799303] [2023-08-24 00:22:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:37,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:37,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:37,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739799303] [2023-08-24 00:22:37,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739799303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:37,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272772857] [2023-08-24 00:22:37,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 00:22:37,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:37,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:37,775 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 00:22:37,777 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 00:22:37,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 00:22:37,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:37,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 00:22:37,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 00:22:38,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:38,289 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:22:38,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 233 [2023-08-24 00:22:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 00:22:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272772857] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:39,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:39,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-08-24 00:22:39,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531848382] [2023-08-24 00:22:39,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:39,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 00:22:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 00:22:39,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-08-24 00:22:39,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:22:39,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 237 transitions, 3423 flow. Second operand has 29 states, 29 states have (on average 89.86206896551724) internal successors, (2606), 29 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:39,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:39,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:22:39,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:40,216 INFO L124 PetriNetUnfolderBase]: 1143/2164 cut-off events. [2023-08-24 00:22:40,216 INFO L125 PetriNetUnfolderBase]: For 34376/34376 co-relation queries the response was YES. [2023-08-24 00:22:40,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15915 conditions, 2164 events. 1143/2164 cut-off events. For 34376/34376 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13128 event pairs, 287 based on Foata normal form. 4/2168 useless extension candidates. Maximal degree in co-relation 15829. Up to 1932 conditions per place. [2023-08-24 00:22:40,232 INFO L140 encePairwiseOnDemand]: 328/338 looper letters, 186 selfloop transitions, 61 changer transitions 3/250 dead transitions. [2023-08-24 00:22:40,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 250 transitions, 3960 flow [2023-08-24 00:22:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 00:22:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 00:22:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1290 transitions. [2023-08-24 00:22:40,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27261200338123415 [2023-08-24 00:22:40,235 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1290 transitions. [2023-08-24 00:22:40,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1290 transitions. [2023-08-24 00:22:40,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:40,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1290 transitions. [2023-08-24 00:22:40,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 92.14285714285714) internal successors, (1290), 14 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:40,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:40,239 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:40,239 INFO L175 Difference]: Start difference. First operand has 186 places, 237 transitions, 3423 flow. Second operand 14 states and 1290 transitions. [2023-08-24 00:22:40,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 250 transitions, 3960 flow [2023-08-24 00:22:40,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 250 transitions, 3816 flow, removed 45 selfloop flow, removed 8 redundant places. [2023-08-24 00:22:40,315 INFO L231 Difference]: Finished difference. Result has 190 places, 235 transitions, 3378 flow [2023-08-24 00:22:40,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3378, PETRI_PLACES=190, PETRI_TRANSITIONS=235} [2023-08-24 00:22:40,316 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 169 predicate places. [2023-08-24 00:22:40,316 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 235 transitions, 3378 flow [2023-08-24 00:22:40,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 89.86206896551724) internal successors, (2606), 29 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:40,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:40,317 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:40,323 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 00:22:40,517 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,SelfDestructingSolverStorable31 [2023-08-24 00:22:40,517 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:40,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:40,518 INFO L85 PathProgramCache]: Analyzing trace with hash 499713746, now seen corresponding path program 12 times [2023-08-24 00:22:40,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:40,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462456717] [2023-08-24 00:22:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:40,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:41,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:41,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462456717] [2023-08-24 00:22:41,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462456717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:41,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177311268] [2023-08-24 00:22:41,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 00:22:41,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:41,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:41,058 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 00:22:41,060 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 00:22:41,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 00:22:41,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:41,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 00:22:41,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:41,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:41,598 INFO L322 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-08-24 00:22:41,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 220 [2023-08-24 00:22:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 00:22:45,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177311268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:45,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:45,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-08-24 00:22:45,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035621957] [2023-08-24 00:22:45,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:45,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 00:22:45,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:45,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 00:22:45,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-08-24 00:22:45,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:22:45,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 235 transitions, 3378 flow. Second operand has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:45,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:45,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:22:45,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:46,553 INFO L124 PetriNetUnfolderBase]: 1197/2290 cut-off events. [2023-08-24 00:22:46,553 INFO L125 PetriNetUnfolderBase]: For 39089/39089 co-relation queries the response was YES. [2023-08-24 00:22:46,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16577 conditions, 2290 events. 1197/2290 cut-off events. For 39089/39089 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14129 event pairs, 243 based on Foata normal form. 72/2362 useless extension candidates. Maximal degree in co-relation 16489. Up to 1616 conditions per place. [2023-08-24 00:22:46,571 INFO L140 encePairwiseOnDemand]: 328/338 looper letters, 198 selfloop transitions, 111 changer transitions 9/318 dead transitions. [2023-08-24 00:22:46,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 318 transitions, 4671 flow [2023-08-24 00:22:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 00:22:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 00:22:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2072 transitions. [2023-08-24 00:22:46,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27864443249058635 [2023-08-24 00:22:46,574 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2072 transitions. [2023-08-24 00:22:46,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2072 transitions. [2023-08-24 00:22:46,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:46,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2072 transitions. [2023-08-24 00:22:46,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 94.18181818181819) internal successors, (2072), 22 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:46,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 338.0) internal successors, (7774), 23 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:46,581 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 338.0) internal successors, (7774), 23 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:46,581 INFO L175 Difference]: Start difference. First operand has 190 places, 235 transitions, 3378 flow. Second operand 22 states and 2072 transitions. [2023-08-24 00:22:46,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 318 transitions, 4671 flow [2023-08-24 00:22:46,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 318 transitions, 4545 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-08-24 00:22:46,667 INFO L231 Difference]: Finished difference. Result has 202 places, 244 transitions, 3683 flow [2023-08-24 00:22:46,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=3254, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3683, PETRI_PLACES=202, PETRI_TRANSITIONS=244} [2023-08-24 00:22:46,668 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2023-08-24 00:22:46,668 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 244 transitions, 3683 flow [2023-08-24 00:22:46,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:46,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:46,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:46,676 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 00:22:46,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-24 00:22:46,871 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:46,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1463133045, now seen corresponding path program 6 times [2023-08-24 00:22:46,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:46,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393237644] [2023-08-24 00:22:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:46,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:47,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:47,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393237644] [2023-08-24 00:22:47,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393237644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:47,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53728579] [2023-08-24 00:22:47,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 00:22:47,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:47,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:47,186 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 00:22:47,193 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 00:22:47,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 00:22:47,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:47,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 00:22:47,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:47,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:47,530 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:22:47,530 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 42 treesize of output 60 [2023-08-24 00:22:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:47,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53728579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:47,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:47,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2023-08-24 00:22:47,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794056529] [2023-08-24 00:22:47,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:47,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 00:22:47,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 00:22:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-08-24 00:22:47,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:22:47,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 244 transitions, 3683 flow. Second operand has 19 states, 19 states have (on average 116.52631578947368) internal successors, (2214), 19 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:47,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:47,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:22:47,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:48,485 INFO L124 PetriNetUnfolderBase]: 1290/2451 cut-off events. [2023-08-24 00:22:48,485 INFO L125 PetriNetUnfolderBase]: For 51339/51339 co-relation queries the response was YES. [2023-08-24 00:22:48,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19104 conditions, 2451 events. 1290/2451 cut-off events. For 51339/51339 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15174 event pairs, 242 based on Foata normal form. 32/2483 useless extension candidates. Maximal degree in co-relation 19012. Up to 1902 conditions per place. [2023-08-24 00:22:48,507 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 270 selfloop transitions, 56 changer transitions 1/327 dead transitions. [2023-08-24 00:22:48,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 327 transitions, 5461 flow [2023-08-24 00:22:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 00:22:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 00:22:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2046 transitions. [2023-08-24 00:22:48,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35607379046293075 [2023-08-24 00:22:48,510 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2046 transitions. [2023-08-24 00:22:48,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2046 transitions. [2023-08-24 00:22:48,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:48,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2046 transitions. [2023-08-24 00:22:48,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 120.3529411764706) internal successors, (2046), 17 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:48,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 338.0) internal successors, (6084), 18 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:48,516 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 338.0) internal successors, (6084), 18 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:48,516 INFO L175 Difference]: Start difference. First operand has 202 places, 244 transitions, 3683 flow. Second operand 17 states and 2046 transitions. [2023-08-24 00:22:48,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 327 transitions, 5461 flow [2023-08-24 00:22:48,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 327 transitions, 5221 flow, removed 31 selfloop flow, removed 16 redundant places. [2023-08-24 00:22:48,647 INFO L231 Difference]: Finished difference. Result has 208 places, 263 transitions, 3824 flow [2023-08-24 00:22:48,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3824, PETRI_PLACES=208, PETRI_TRANSITIONS=263} [2023-08-24 00:22:48,648 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 187 predicate places. [2023-08-24 00:22:48,648 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 263 transitions, 3824 flow [2023-08-24 00:22:48,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 116.52631578947368) internal successors, (2214), 19 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:48,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:48,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:48,653 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 00:22:48,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:48,849 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:48,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash -164001078, now seen corresponding path program 13 times [2023-08-24 00:22:48,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:48,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674157446] [2023-08-24 00:22:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:48,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:49,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:49,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674157446] [2023-08-24 00:22:49,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674157446] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:49,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121272110] [2023-08-24 00:22:49,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 00:22:49,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:49,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:49,350 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 00:22:49,352 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 00:22:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:49,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-24 00:22:49,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:49,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:49,863 INFO L322 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-08-24 00:22:49,863 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 49 treesize of output 86 [2023-08-24 00:22:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:50,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121272110] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:50,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:50,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-24 00:22:50,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345256807] [2023-08-24 00:22:50,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:50,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 00:22:50,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:50,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 00:22:50,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 00:22:50,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:22:50,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 263 transitions, 3824 flow. Second operand has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:50,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:50,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:22:50,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:50,813 INFO L124 PetriNetUnfolderBase]: 1291/2461 cut-off events. [2023-08-24 00:22:50,813 INFO L125 PetriNetUnfolderBase]: For 51112/51112 co-relation queries the response was YES. [2023-08-24 00:22:50,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19111 conditions, 2461 events. 1291/2461 cut-off events. For 51112/51112 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15316 event pairs, 358 based on Foata normal form. 2/2463 useless extension candidates. Maximal degree in co-relation 19014. Up to 2371 conditions per place. [2023-08-24 00:22:50,833 INFO L140 encePairwiseOnDemand]: 328/338 looper letters, 239 selfloop transitions, 27 changer transitions 13/279 dead transitions. [2023-08-24 00:22:50,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 279 transitions, 4542 flow [2023-08-24 00:22:50,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 00:22:50,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 00:22:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1189 transitions. [2023-08-24 00:22:50,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27059626763768774 [2023-08-24 00:22:50,835 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1189 transitions. [2023-08-24 00:22:50,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1189 transitions. [2023-08-24 00:22:50,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:50,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1189 transitions. [2023-08-24 00:22:50,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 91.46153846153847) internal successors, (1189), 13 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:50,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 338.0) internal successors, (4732), 14 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:50,840 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 338.0) internal successors, (4732), 14 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:50,840 INFO L175 Difference]: Start difference. First operand has 208 places, 263 transitions, 3824 flow. Second operand 13 states and 1189 transitions. [2023-08-24 00:22:50,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 279 transitions, 4542 flow [2023-08-24 00:22:50,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 279 transitions, 4355 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-08-24 00:22:50,979 INFO L231 Difference]: Finished difference. Result has 213 places, 263 transitions, 3729 flow [2023-08-24 00:22:50,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=3654, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3729, PETRI_PLACES=213, PETRI_TRANSITIONS=263} [2023-08-24 00:22:50,980 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 192 predicate places. [2023-08-24 00:22:50,980 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 263 transitions, 3729 flow [2023-08-24 00:22:50,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:50,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:50,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:50,985 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 00:22:51,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:51,181 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:51,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1653419765, now seen corresponding path program 7 times [2023-08-24 00:22:51,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:51,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853455525] [2023-08-24 00:22:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:51,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853455525] [2023-08-24 00:22:51,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853455525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341942586] [2023-08-24 00:22:51,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 00:22:51,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:51,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:51,527 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 00:22:51,550 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 00:22:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:51,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 00:22:51,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:51,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:51,859 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 00:22:51,860 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 40 treesize of output 56 [2023-08-24 00:22:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 00:22:51,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341942586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:51,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:51,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 18 [2023-08-24 00:22:51,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395709300] [2023-08-24 00:22:51,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:51,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 00:22:51,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:51,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 00:22:51,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2023-08-24 00:22:51,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:22:51,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 263 transitions, 3729 flow. Second operand has 19 states, 19 states have (on average 116.52631578947368) internal successors, (2214), 19 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:51,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:51,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:22:51,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:52,729 INFO L124 PetriNetUnfolderBase]: 1306/2493 cut-off events. [2023-08-24 00:22:52,730 INFO L125 PetriNetUnfolderBase]: For 57645/57645 co-relation queries the response was YES. [2023-08-24 00:22:52,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19339 conditions, 2493 events. 1306/2493 cut-off events. For 57645/57645 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15635 event pairs, 310 based on Foata normal form. 24/2517 useless extension candidates. Maximal degree in co-relation 19240. Up to 2156 conditions per place. [2023-08-24 00:22:52,752 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 269 selfloop transitions, 59 changer transitions 3/331 dead transitions. [2023-08-24 00:22:52,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 331 transitions, 5285 flow [2023-08-24 00:22:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 00:22:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 00:22:52,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2281 transitions. [2023-08-24 00:22:52,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3551853005294301 [2023-08-24 00:22:52,756 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2281 transitions. [2023-08-24 00:22:52,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2281 transitions. [2023-08-24 00:22:52,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:52,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2281 transitions. [2023-08-24 00:22:52,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 120.05263157894737) internal successors, (2281), 19 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:52,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 338.0) internal successors, (6760), 20 states have internal predecessors, (6760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:52,763 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 338.0) internal successors, (6760), 20 states have internal predecessors, (6760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:52,764 INFO L175 Difference]: Start difference. First operand has 213 places, 263 transitions, 3729 flow. Second operand 19 states and 2281 transitions. [2023-08-24 00:22:52,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 331 transitions, 5285 flow [2023-08-24 00:22:52,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 331 transitions, 5203 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-08-24 00:22:52,894 INFO L231 Difference]: Finished difference. Result has 217 places, 281 transitions, 4015 flow [2023-08-24 00:22:52,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4015, PETRI_PLACES=217, PETRI_TRANSITIONS=281} [2023-08-24 00:22:52,894 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 196 predicate places. [2023-08-24 00:22:52,894 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 281 transitions, 4015 flow [2023-08-24 00:22:52,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 116.52631578947368) internal successors, (2214), 19 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:52,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:52,895 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:52,900 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 00:22:53,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:53,096 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:53,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:53,096 INFO L85 PathProgramCache]: Analyzing trace with hash -38141832, now seen corresponding path program 14 times [2023-08-24 00:22:53,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:53,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680695834] [2023-08-24 00:22:53,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:53,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:53,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:53,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680695834] [2023-08-24 00:22:53,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680695834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:53,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741317203] [2023-08-24 00:22:53,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:22:53,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:53,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:53,649 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 00:22:53,675 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 00:22:53,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:22:53,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:53,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-24 00:22:53,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:54,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:54,286 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:22:54,287 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 20 treesize of output 4 [2023-08-24 00:22:54,292 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:22:54,292 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 20 treesize of output 4 [2023-08-24 00:22:54,329 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 00:22:54,329 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 40 treesize of output 56 [2023-08-24 00:22:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:54,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741317203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:54,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:54,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-24 00:22:54,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96764835] [2023-08-24 00:22:54,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:54,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 00:22:54,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:54,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 00:22:54,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 00:22:54,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:22:54,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 281 transitions, 4015 flow. Second operand has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:54,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:54,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:22:54,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:55,525 INFO L124 PetriNetUnfolderBase]: 1326/2541 cut-off events. [2023-08-24 00:22:55,526 INFO L125 PetriNetUnfolderBase]: For 57111/57111 co-relation queries the response was YES. [2023-08-24 00:22:55,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19814 conditions, 2541 events. 1326/2541 cut-off events. For 57111/57111 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16103 event pairs, 342 based on Foata normal form. 12/2553 useless extension candidates. Maximal degree in co-relation 19719. Up to 2300 conditions per place. [2023-08-24 00:22:55,547 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 259 selfloop transitions, 53 changer transitions 1/313 dead transitions. [2023-08-24 00:22:55,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 313 transitions, 4939 flow [2023-08-24 00:22:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 00:22:55,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 00:22:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1390 transitions. [2023-08-24 00:22:55,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27416173570019725 [2023-08-24 00:22:55,549 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1390 transitions. [2023-08-24 00:22:55,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1390 transitions. [2023-08-24 00:22:55,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:55,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1390 transitions. [2023-08-24 00:22:55,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 92.66666666666667) internal successors, (1390), 15 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:55,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 338.0) internal successors, (5408), 16 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:55,553 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 338.0) internal successors, (5408), 16 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:55,553 INFO L175 Difference]: Start difference. First operand has 217 places, 281 transitions, 4015 flow. Second operand 15 states and 1390 transitions. [2023-08-24 00:22:55,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 313 transitions, 4939 flow [2023-08-24 00:22:55,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 313 transitions, 4752 flow, removed 55 selfloop flow, removed 7 redundant places. [2023-08-24 00:22:55,682 INFO L231 Difference]: Finished difference. Result has 225 places, 282 transitions, 3970 flow [2023-08-24 00:22:55,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=3830, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3970, PETRI_PLACES=225, PETRI_TRANSITIONS=282} [2023-08-24 00:22:55,683 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 204 predicate places. [2023-08-24 00:22:55,683 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 282 transitions, 3970 flow [2023-08-24 00:22:55,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:55,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:55,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:55,693 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 00:22:55,890 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,SelfDestructingSolverStorable36 [2023-08-24 00:22:55,890 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:55,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:55,890 INFO L85 PathProgramCache]: Analyzing trace with hash -589546973, now seen corresponding path program 8 times [2023-08-24 00:22:55,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:55,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451224051] [2023-08-24 00:22:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:55,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:56,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:56,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451224051] [2023-08-24 00:22:56,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451224051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:56,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679485067] [2023-08-24 00:22:56,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:22:56,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:56,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:56,233 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 00:22:56,242 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 00:22:56,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:22:56,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:56,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 00:22:56,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:22:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:22:56,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:22:56,556 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 00:22:56,556 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 40 treesize of output 56 [2023-08-24 00:22:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 00:22:56,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679485067] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:22:56,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:22:56,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 17 [2023-08-24 00:22:56,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540960492] [2023-08-24 00:22:56,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:22:56,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 00:22:56,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:22:56,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 00:22:56,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-24 00:22:56,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:22:56,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 282 transitions, 3970 flow. Second operand has 18 states, 18 states have (on average 116.55555555555556) internal successors, (2098), 18 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:56,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:22:56,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:22:56,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:22:58,782 INFO L124 PetriNetUnfolderBase]: 1290/2465 cut-off events. [2023-08-24 00:22:58,782 INFO L125 PetriNetUnfolderBase]: For 57666/57666 co-relation queries the response was YES. [2023-08-24 00:22:58,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19376 conditions, 2465 events. 1290/2465 cut-off events. For 57666/57666 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15413 event pairs, 320 based on Foata normal form. 12/2477 useless extension candidates. Maximal degree in co-relation 19280. Up to 2196 conditions per place. [2023-08-24 00:22:58,804 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 249 selfloop transitions, 50 changer transitions 14/313 dead transitions. [2023-08-24 00:22:58,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 313 transitions, 4925 flow [2023-08-24 00:22:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:22:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:22:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1446 transitions. [2023-08-24 00:22:58,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35650887573964496 [2023-08-24 00:22:58,806 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1446 transitions. [2023-08-24 00:22:58,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1446 transitions. [2023-08-24 00:22:58,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:22:58,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1446 transitions. [2023-08-24 00:22:58,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 120.5) internal successors, (1446), 12 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:58,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 338.0) internal successors, (4394), 13 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:58,810 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 338.0) internal successors, (4394), 13 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:58,811 INFO L175 Difference]: Start difference. First operand has 225 places, 282 transitions, 3970 flow. Second operand 12 states and 1446 transitions. [2023-08-24 00:22:58,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 313 transitions, 4925 flow [2023-08-24 00:22:58,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 313 transitions, 4803 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-08-24 00:22:58,939 INFO L231 Difference]: Finished difference. Result has 223 places, 277 transitions, 3918 flow [2023-08-24 00:22:58,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=3830, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3918, PETRI_PLACES=223, PETRI_TRANSITIONS=277} [2023-08-24 00:22:58,940 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 202 predicate places. [2023-08-24 00:22:58,940 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 277 transitions, 3918 flow [2023-08-24 00:22:58,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 116.55555555555556) internal successors, (2098), 18 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:22:58,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:22:58,940 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:22:58,945 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 00:22:59,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 00:22:59,141 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:22:59,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:22:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1152156226, now seen corresponding path program 15 times [2023-08-24 00:22:59,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:22:59,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434299119] [2023-08-24 00:22:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:22:59,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:22:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:22:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:22:59,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:22:59,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434299119] [2023-08-24 00:22:59,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434299119] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:22:59,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445162832] [2023-08-24 00:22:59,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 00:22:59,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:22:59,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:22:59,661 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 00:22:59,664 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 00:22:59,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 00:22:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:22:59,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-24 00:22:59,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:23:00,014 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 00:23:00,074 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 00:23:00,122 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 00:23:00,319 INFO L322 Elim1Store]: treesize reduction 48, result has 15.8 percent of original size [2023-08-24 00:23:00,319 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 28 treesize of output 16 [2023-08-24 00:23:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:23:00,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:23:11,392 WARN L234 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 00:23:15,730 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:15,731 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 114 treesize of output 78 [2023-08-24 00:23:15,792 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:23:15,793 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 3500 treesize of output 3008 [2023-08-24 00:23:15,829 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:23:15,831 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:23:15,855 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:15,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 724 treesize of output 670 [2023-08-24 00:23:15,877 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:23:15,877 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:23:15,901 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:15,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 620 treesize of output 462 [2023-08-24 00:23:17,340 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:17,340 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 114 treesize of output 78 [2023-08-24 00:23:17,390 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:23:17,390 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 3500 treesize of output 3008 [2023-08-24 00:23:17,421 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:23:17,422 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:23:17,442 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:17,442 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 724 treesize of output 566 [2023-08-24 00:23:17,459 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:23:17,460 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:23:17,479 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:17,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 516 treesize of output 462 [2023-08-24 00:23:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:23:21,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445162832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:23:21,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:23:21,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-08-24 00:23:21,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838848761] [2023-08-24 00:23:21,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:23:21,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 00:23:21,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:23:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 00:23:21,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1184, Unknown=7, NotChecked=0, Total=1332 [2023-08-24 00:23:21,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 338 [2023-08-24 00:23:21,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 277 transitions, 3918 flow. Second operand has 37 states, 37 states have (on average 81.56756756756756) internal successors, (3018), 37 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:21,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:23:21,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 338 [2023-08-24 00:23:21,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:23:23,416 INFO L124 PetriNetUnfolderBase]: 1527/2879 cut-off events. [2023-08-24 00:23:23,417 INFO L125 PetriNetUnfolderBase]: For 70129/70129 co-relation queries the response was YES. [2023-08-24 00:23:23,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23148 conditions, 2879 events. 1527/2879 cut-off events. For 70129/70129 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18551 event pairs, 73 based on Foata normal form. 10/2889 useless extension candidates. Maximal degree in co-relation 23054. Up to 910 conditions per place. [2023-08-24 00:23:23,441 INFO L140 encePairwiseOnDemand]: 326/338 looper letters, 211 selfloop transitions, 256 changer transitions 5/472 dead transitions. [2023-08-24 00:23:23,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 472 transitions, 7083 flow [2023-08-24 00:23:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 00:23:23,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 00:23:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2800 transitions. [2023-08-24 00:23:23,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2510310202617895 [2023-08-24 00:23:23,444 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2800 transitions. [2023-08-24 00:23:23,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2800 transitions. [2023-08-24 00:23:23,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:23:23,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2800 transitions. [2023-08-24 00:23:23,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 84.84848484848484) internal successors, (2800), 33 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:23,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 338.0) internal successors, (11492), 34 states have internal predecessors, (11492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:23,455 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 338.0) internal successors, (11492), 34 states have internal predecessors, (11492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:23,455 INFO L175 Difference]: Start difference. First operand has 223 places, 277 transitions, 3918 flow. Second operand 33 states and 2800 transitions. [2023-08-24 00:23:23,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 472 transitions, 7083 flow [2023-08-24 00:23:23,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 472 transitions, 6921 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-24 00:23:23,639 INFO L231 Difference]: Finished difference. Result has 252 places, 360 transitions, 5795 flow [2023-08-24 00:23:23,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5795, PETRI_PLACES=252, PETRI_TRANSITIONS=360} [2023-08-24 00:23:23,639 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 231 predicate places. [2023-08-24 00:23:23,639 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 360 transitions, 5795 flow [2023-08-24 00:23:23,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 81.56756756756756) internal successors, (3018), 37 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:23,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:23:23,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:23:23,647 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 00:23:23,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 00:23:23,841 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:23:23,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:23:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash -897611008, now seen corresponding path program 16 times [2023-08-24 00:23:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:23:23,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207924891] [2023-08-24 00:23:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:23:23,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:23:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:23:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:23:24,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:23:24,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207924891] [2023-08-24 00:23:24,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207924891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:23:24,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039906538] [2023-08-24 00:23:24,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 00:23:24,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:23:24,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:23:24,357 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 00:23:24,403 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 00:23:24,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 00:23:24,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:23:24,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 00:23:24,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:23:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:23:24,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:23:24,953 INFO L322 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-08-24 00:23:24,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 220 [2023-08-24 00:23:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 00:23:29,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039906538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:23:29,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:23:29,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-08-24 00:23:29,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033024370] [2023-08-24 00:23:29,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:23:29,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 00:23:29,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:23:29,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 00:23:29,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-08-24 00:23:29,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:23:29,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 360 transitions, 5795 flow. Second operand has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:29,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:23:29,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:23:29,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:23:30,157 INFO L124 PetriNetUnfolderBase]: 1510/2828 cut-off events. [2023-08-24 00:23:30,158 INFO L125 PetriNetUnfolderBase]: For 96418/96418 co-relation queries the response was YES. [2023-08-24 00:23:30,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25294 conditions, 2828 events. 1510/2828 cut-off events. For 96418/96418 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 17985 event pairs, 304 based on Foata normal form. 8/2836 useless extension candidates. Maximal degree in co-relation 25190. Up to 2554 conditions per place. [2023-08-24 00:23:30,184 INFO L140 encePairwiseOnDemand]: 328/338 looper letters, 304 selfloop transitions, 68 changer transitions 8/380 dead transitions. [2023-08-24 00:23:30,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 380 transitions, 6745 flow [2023-08-24 00:23:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 00:23:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 00:23:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1656 transitions. [2023-08-24 00:23:30,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27218934911242604 [2023-08-24 00:23:30,186 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1656 transitions. [2023-08-24 00:23:30,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1656 transitions. [2023-08-24 00:23:30,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:23:30,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1656 transitions. [2023-08-24 00:23:30,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 92.0) internal successors, (1656), 18 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 00:23:30,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 338.0) internal successors, (6422), 19 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:30,193 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 338.0) internal successors, (6422), 19 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:30,193 INFO L175 Difference]: Start difference. First operand has 252 places, 360 transitions, 5795 flow. Second operand 18 states and 1656 transitions. [2023-08-24 00:23:30,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 380 transitions, 6745 flow [2023-08-24 00:23:30,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 380 transitions, 6365 flow, removed 152 selfloop flow, removed 11 redundant places. [2023-08-24 00:23:30,489 INFO L231 Difference]: Finished difference. Result has 257 places, 353 transitions, 5498 flow [2023-08-24 00:23:30,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=5370, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5498, PETRI_PLACES=257, PETRI_TRANSITIONS=353} [2023-08-24 00:23:30,490 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2023-08-24 00:23:30,490 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 353 transitions, 5498 flow [2023-08-24 00:23:30,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:30,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:23:30,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:23:30,495 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 00:23:30,691 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,SelfDestructingSolverStorable39 [2023-08-24 00:23:30,691 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:23:30,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:23:30,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1222751539, now seen corresponding path program 9 times [2023-08-24 00:23:30,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:23:30,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921760961] [2023-08-24 00:23:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:23:30,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:23:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:23:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:23:31,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:23:31,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921760961] [2023-08-24 00:23:31,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921760961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:23:31,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120500951] [2023-08-24 00:23:31,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 00:23:31,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:23:31,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:23:31,180 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 00:23:31,186 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 00:23:31,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 00:23:31,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:23:31,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 00:23:31,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:23:31,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:23:31,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:23:31,523 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 00:23:31,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-08-24 00:23:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:23:31,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:23:31,617 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1598 (Array Int Int))) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1598)) (.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select (select .cse0 c_~B~0.base) (+ .cse1 4 c_~B~0.offset)))))) is different from false [2023-08-24 00:23:31,693 INFO L322 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-24 00:23:31,693 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 130 treesize of output 145 [2023-08-24 00:23:31,702 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:31,703 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 74 treesize of output 55 [2023-08-24 00:23:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:23:31,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120500951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:23:31,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:23:31,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-24 00:23:31,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140909023] [2023-08-24 00:23:31,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:23:31,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 00:23:31,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:23:31,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 00:23:31,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=528, Unknown=1, NotChecked=46, Total=650 [2023-08-24 00:23:31,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 338 [2023-08-24 00:23:31,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 353 transitions, 5498 flow. Second operand has 26 states, 26 states have (on average 107.92307692307692) internal successors, (2806), 26 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:31,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:23:31,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 338 [2023-08-24 00:23:31,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:23:32,967 INFO L124 PetriNetUnfolderBase]: 1506/2831 cut-off events. [2023-08-24 00:23:32,967 INFO L125 PetriNetUnfolderBase]: For 92228/92228 co-relation queries the response was YES. [2023-08-24 00:23:32,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24519 conditions, 2831 events. 1506/2831 cut-off events. For 92228/92228 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17992 event pairs, 265 based on Foata normal form. 8/2839 useless extension candidates. Maximal degree in co-relation 24416. Up to 2266 conditions per place. [2023-08-24 00:23:32,994 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 275 selfloop transitions, 102 changer transitions 23/400 dead transitions. [2023-08-24 00:23:32,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 400 transitions, 6776 flow [2023-08-24 00:23:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:23:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:23:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1353 transitions. [2023-08-24 00:23:32,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33357988165680474 [2023-08-24 00:23:32,996 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1353 transitions. [2023-08-24 00:23:32,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1353 transitions. [2023-08-24 00:23:32,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:23:32,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1353 transitions. [2023-08-24 00:23:32,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 112.75) internal successors, (1353), 12 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:32,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 338.0) internal successors, (4394), 13 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:32,999 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 338.0) internal successors, (4394), 13 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:32,999 INFO L175 Difference]: Start difference. First operand has 257 places, 353 transitions, 5498 flow. Second operand 12 states and 1353 transitions. [2023-08-24 00:23:32,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 400 transitions, 6776 flow [2023-08-24 00:23:33,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 400 transitions, 6632 flow, removed 4 selfloop flow, removed 17 redundant places. [2023-08-24 00:23:33,240 INFO L231 Difference]: Finished difference. Result has 248 places, 349 transitions, 5546 flow [2023-08-24 00:23:33,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=5354, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5546, PETRI_PLACES=248, PETRI_TRANSITIONS=349} [2023-08-24 00:23:33,240 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 227 predicate places. [2023-08-24 00:23:33,240 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 349 transitions, 5546 flow [2023-08-24 00:23:33,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 107.92307692307692) internal successors, (2806), 26 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:33,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:23:33,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:23:33,246 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 00:23:33,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:23:33,442 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:23:33,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:23:33,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1111287368, now seen corresponding path program 17 times [2023-08-24 00:23:33,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:23:33,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035266354] [2023-08-24 00:23:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:23:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:23:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:23:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:23:34,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:23:34,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035266354] [2023-08-24 00:23:34,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035266354] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:23:34,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480802146] [2023-08-24 00:23:34,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 00:23:34,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:23:34,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:23:34,131 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 00:23:34,132 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 00:23:34,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 00:23:34,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:23:34,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 00:23:34,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:23:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:23:34,286 INFO L322 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-08-24 00:23:34,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-24 00:23:34,331 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:23:34,331 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 11 treesize of output 11 [2023-08-24 00:23:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:23:34,510 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 00:23:34,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2023-08-24 00:23:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:23:34,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:23:34,938 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:34,939 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 179 treesize of output 298 [2023-08-24 00:23:34,955 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:34,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 76 [2023-08-24 00:23:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:23:36,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480802146] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:23:36,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:23:36,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 30 [2023-08-24 00:23:36,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122534021] [2023-08-24 00:23:36,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:23:36,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 00:23:36,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:23:36,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 00:23:36,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=808, Unknown=3, NotChecked=0, Total=930 [2023-08-24 00:23:36,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 338 [2023-08-24 00:23:36,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 349 transitions, 5546 flow. Second operand has 31 states, 31 states have (on average 79.87096774193549) internal successors, (2476), 31 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:36,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:23:36,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 338 [2023-08-24 00:23:36,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:23:37,825 INFO L124 PetriNetUnfolderBase]: 1683/3134 cut-off events. [2023-08-24 00:23:37,825 INFO L125 PetriNetUnfolderBase]: For 112511/112511 co-relation queries the response was YES. [2023-08-24 00:23:37,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28342 conditions, 3134 events. 1683/3134 cut-off events. For 112511/112511 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19843 event pairs, 188 based on Foata normal form. 54/3188 useless extension candidates. Maximal degree in co-relation 28242. Up to 1757 conditions per place. [2023-08-24 00:23:37,856 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 253 selfloop transitions, 178 changer transitions 9/440 dead transitions. [2023-08-24 00:23:37,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 440 transitions, 7587 flow [2023-08-24 00:23:37,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 00:23:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 00:23:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1590 transitions. [2023-08-24 00:23:37,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2475864216754905 [2023-08-24 00:23:37,859 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1590 transitions. [2023-08-24 00:23:37,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1590 transitions. [2023-08-24 00:23:37,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:23:37,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1590 transitions. [2023-08-24 00:23:37,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.6842105263158) internal successors, (1590), 19 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:37,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 338.0) internal successors, (6760), 20 states have internal predecessors, (6760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:37,864 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 338.0) internal successors, (6760), 20 states have internal predecessors, (6760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:37,864 INFO L175 Difference]: Start difference. First operand has 248 places, 349 transitions, 5546 flow. Second operand 19 states and 1590 transitions. [2023-08-24 00:23:37,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 440 transitions, 7587 flow [2023-08-24 00:23:38,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 440 transitions, 7325 flow, removed 29 selfloop flow, removed 9 redundant places. [2023-08-24 00:23:38,143 INFO L231 Difference]: Finished difference. Result has 257 places, 367 transitions, 6215 flow [2023-08-24 00:23:38,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=5203, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6215, PETRI_PLACES=257, PETRI_TRANSITIONS=367} [2023-08-24 00:23:38,144 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2023-08-24 00:23:38,144 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 367 transitions, 6215 flow [2023-08-24 00:23:38,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 79.87096774193549) internal successors, (2476), 31 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:38,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:23:38,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:23:38,150 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 00:23:38,345 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,SelfDestructingSolverStorable41 [2023-08-24 00:23:38,345 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:23:38,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:23:38,346 INFO L85 PathProgramCache]: Analyzing trace with hash -236895133, now seen corresponding path program 10 times [2023-08-24 00:23:38,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:23:38,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195345786] [2023-08-24 00:23:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:23:38,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:23:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:23:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:23:38,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:23:38,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195345786] [2023-08-24 00:23:38,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195345786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:23:38,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261745552] [2023-08-24 00:23:38,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 00:23:38,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:23:38,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:23:38,733 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 00:23:38,765 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 00:23:38,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 00:23:38,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:23:38,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 00:23:38,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:23:39,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:23:39,070 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 00:23:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:23:39,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:23:39,241 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1697 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1697))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 ~B~0.offset 4)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1 4))))) (= (select .cse0 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork0_#t~mem1|))))) is different from false [2023-08-24 00:23:39,272 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:39,273 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 156 treesize of output 178 [2023-08-24 00:23:39,291 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:39,292 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 88 treesize of output 89 [2023-08-24 00:23:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:23:39,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261745552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:23:39,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:23:39,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-08-24 00:23:39,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380876953] [2023-08-24 00:23:39,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:23:39,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 00:23:39,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:23:39,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 00:23:39,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=523, Unknown=1, NotChecked=46, Total=650 [2023-08-24 00:23:39,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 338 [2023-08-24 00:23:39,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 367 transitions, 6215 flow. Second operand has 26 states, 26 states have (on average 112.0) internal successors, (2912), 26 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:39,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:23:39,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 338 [2023-08-24 00:23:39,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:23:49,905 WARN L234 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 43 DAG size of output: 33 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 00:23:50,582 INFO L124 PetriNetUnfolderBase]: 1675/3110 cut-off events. [2023-08-24 00:23:50,582 INFO L125 PetriNetUnfolderBase]: For 126642/126642 co-relation queries the response was YES. [2023-08-24 00:23:50,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29013 conditions, 3110 events. 1675/3110 cut-off events. For 126642/126642 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19477 event pairs, 289 based on Foata normal form. 12/3122 useless extension candidates. Maximal degree in co-relation 28910. Up to 2469 conditions per place. [2023-08-24 00:23:50,615 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 275 selfloop transitions, 140 changer transitions 4/419 dead transitions. [2023-08-24 00:23:50,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 419 transitions, 7842 flow [2023-08-24 00:23:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 00:23:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 00:23:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1733 transitions. [2023-08-24 00:23:50,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3418145956607495 [2023-08-24 00:23:50,617 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1733 transitions. [2023-08-24 00:23:50,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1733 transitions. [2023-08-24 00:23:50,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:23:50,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1733 transitions. [2023-08-24 00:23:50,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 115.53333333333333) internal successors, (1733), 15 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:50,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 338.0) internal successors, (5408), 16 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:50,622 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 338.0) internal successors, (5408), 16 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:50,622 INFO L175 Difference]: Start difference. First operand has 257 places, 367 transitions, 6215 flow. Second operand 15 states and 1733 transitions. [2023-08-24 00:23:50,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 419 transitions, 7842 flow [2023-08-24 00:23:51,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 419 transitions, 7351 flow, removed 127 selfloop flow, removed 13 redundant places. [2023-08-24 00:23:51,057 INFO L231 Difference]: Finished difference. Result has 260 places, 381 transitions, 6353 flow [2023-08-24 00:23:51,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=5745, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6353, PETRI_PLACES=260, PETRI_TRANSITIONS=381} [2023-08-24 00:23:51,058 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 239 predicate places. [2023-08-24 00:23:51,058 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 381 transitions, 6353 flow [2023-08-24 00:23:51,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 112.0) internal successors, (2912), 26 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:51,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:23:51,059 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:23:51,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-24 00:23:51,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:23:51,265 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:23:51,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:23:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash -603862356, now seen corresponding path program 18 times [2023-08-24 00:23:51,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:23:51,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414343071] [2023-08-24 00:23:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:23:51,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:23:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:23:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:23:51,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:23:51,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414343071] [2023-08-24 00:23:51,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414343071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:23:51,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967584668] [2023-08-24 00:23:51,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 00:23:51,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:23:51,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:23:51,877 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 00:23:51,878 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 00:23:52,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 00:23:52,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:23:52,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 00:23:52,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:23:52,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:23:52,188 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 00:23:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:23:52,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:23:52,938 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse0 (+ c_~i_BA~0 1)) (.cse1 (forall ((v_ArrVal_1744 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork0_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1744) ~B~0.base) (+ ~B~0.offset .cse3))))))) (and (or (< .cse0 c_~An~0) .cse1) (or (< .cse0 c_~Bn~0) .cse1) (forall ((v_ArrVal_1744 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1744))) (let ((.cse2 (select .cse5 ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork0_#t~mem1| (select .cse2 (+ ~B~0.offset .cse3)))) (let ((.cse4 (* c_~i_BA~0 4))) (= (select .cse2 (+ .cse4 ~B~0.offset 4)) (select (select .cse5 c_~A~0.base) (+ c_~A~0.offset .cse4 4))))))))))) is different from false [2023-08-24 00:23:53,038 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:53,038 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 263 treesize of output 373 [2023-08-24 00:23:53,067 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:23:53,068 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 155 treesize of output 157 [2023-08-24 00:23:53,080 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 121 treesize of output 115 [2023-08-24 00:23:53,093 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 115 treesize of output 109 [2023-08-24 00:23:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:23:55,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967584668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:23:55,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:23:55,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-08-24 00:23:55,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622428239] [2023-08-24 00:23:55,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:23:55,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 00:23:55,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:23:55,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 00:23:55,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=628, Unknown=1, NotChecked=50, Total=756 [2023-08-24 00:23:55,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 338 [2023-08-24 00:23:55,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 381 transitions, 6353 flow. Second operand has 28 states, 28 states have (on average 85.92857142857143) internal successors, (2406), 28 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:23:55,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:23:55,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 338 [2023-08-24 00:23:55,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:23:59,353 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~i_BA~0 4)) (.cse4 (* c_~i_AB~0 4)) (.cse2 (+ c_~i_BA~0 1))) (let ((.cse8 (< .cse2 c_~An~0)) (.cse9 (forall ((v_ArrVal_1744 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork0_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1744) ~B~0.base) (+ ~B~0.offset .cse4)))))) (.cse1 (select |c_#memory_int| c_~B~0.base)) (.cse0 (select |c_#memory_int| c_~A~0.base)) (.cse5 (+ c_~A~0.offset .cse6 4)) (.cse7 (forall ((~B~0.offset Int) (~B~0.base Int)) (not (= (select (select |c_#memory_int| ~B~0.base) (+ ~B~0.offset .cse4)) |c_thread1Thread1of1ForFork0_#t~mem1|)))) (.cse10 (< .cse2 c_~Bn~0))) (and (= (select .cse0 4) (select .cse1 (+ 4 c_~B~0.offset))) (= c_~i_AB~0 .cse2) (< 1 c_~An~0) (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse3 (select |c_#memory_int| ~B~0.base))) (or (not (= (select .cse3 (+ ~B~0.offset .cse4)) |c_thread1Thread1of1ForFork0_#t~mem1|)) (= (select .cse0 .cse5) (select .cse3 (+ .cse6 ~B~0.offset 4)))))) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) (= c_~i_BA~0 1) (= c_~B~0.offset 0) (or .cse7 .cse8) (<= .cse2 c_~An~0) (or .cse8 .cse9) (or .cse10 .cse9) (= c_~A~0.offset 0) (<= .cse2 c_~Bn~0) (= (select .cse1 .cse6) (select .cse0 .cse6)) (forall ((v_ArrVal_1744 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1744))) (let ((.cse11 (select .cse12 ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork0_#t~mem1| (select .cse11 (+ ~B~0.offset .cse4)))) (= (select .cse11 (+ .cse6 ~B~0.offset 4)) (select (select .cse12 c_~A~0.base) .cse5)))))) (< 1 c_~Bn~0) (or .cse7 .cse10)))) is different from false [2023-08-24 00:23:59,377 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~i_BA~0 4)) (.cse2 (* c_~i_AB~0 4)) (.cse0 (+ c_~i_BA~0 1))) (let ((.cse3 (select |c_#memory_int| c_~A~0.base)) (.cse7 (< .cse0 c_~An~0)) (.cse8 (forall ((v_ArrVal_1744 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork0_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1744) ~B~0.base) (+ ~B~0.offset .cse2)))))) (.cse4 (+ c_~A~0.offset .cse5 4)) (.cse6 (forall ((~B~0.offset Int) (~B~0.base Int)) (not (= (select (select |c_#memory_int| ~B~0.base) (+ ~B~0.offset .cse2)) |c_thread1Thread1of1ForFork0_#t~mem1|)))) (.cse9 (< .cse0 c_~Bn~0))) (and (= c_~i_AB~0 .cse0) (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse1 (select |c_#memory_int| ~B~0.base))) (or (not (= (select .cse1 (+ ~B~0.offset .cse2)) |c_thread1Thread1of1ForFork0_#t~mem1|)) (= (select .cse3 .cse4) (select .cse1 (+ .cse5 ~B~0.offset 4)))))) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) (< c_~i_BA~0 c_~An~0) (< c_~i_BA~0 c_~Bn~0) (= (select .cse3 (+ c_~A~0.offset .cse5)) (select (select |c_#memory_int| c_~B~0.base) (+ .cse5 c_~B~0.offset))) (or .cse6 .cse7) (or .cse7 .cse8) (or .cse9 .cse8) (forall ((v_ArrVal_1744 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1744))) (let ((.cse10 (select .cse11 ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork0_#t~mem1| (select .cse10 (+ ~B~0.offset .cse2)))) (= (select .cse10 (+ .cse5 ~B~0.offset 4)) (select (select .cse11 c_~A~0.base) .cse4)))))) (or .cse6 .cse9)))) is different from false [2023-08-24 00:24:00,049 INFO L124 PetriNetUnfolderBase]: 1760/3318 cut-off events. [2023-08-24 00:24:00,050 INFO L125 PetriNetUnfolderBase]: For 129286/129286 co-relation queries the response was YES. [2023-08-24 00:24:00,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30035 conditions, 3318 events. 1760/3318 cut-off events. For 129286/129286 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21196 event pairs, 254 based on Foata normal form. 52/3370 useless extension candidates. Maximal degree in co-relation 29930. Up to 2704 conditions per place. [2023-08-24 00:24:00,080 INFO L140 encePairwiseOnDemand]: 325/338 looper letters, 312 selfloop transitions, 174 changer transitions 5/491 dead transitions. [2023-08-24 00:24:00,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 491 transitions, 8819 flow [2023-08-24 00:24:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 00:24:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 00:24:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2309 transitions. [2023-08-24 00:24:00,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26274465179790624 [2023-08-24 00:24:00,083 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2309 transitions. [2023-08-24 00:24:00,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2309 transitions. [2023-08-24 00:24:00,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:24:00,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2309 transitions. [2023-08-24 00:24:00,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 88.8076923076923) internal successors, (2309), 26 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:00,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 338.0) internal successors, (9126), 27 states have internal predecessors, (9126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:00,089 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 338.0) internal successors, (9126), 27 states have internal predecessors, (9126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:00,089 INFO L175 Difference]: Start difference. First operand has 260 places, 381 transitions, 6353 flow. Second operand 26 states and 2309 transitions. [2023-08-24 00:24:00,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 491 transitions, 8819 flow [2023-08-24 00:24:00,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 491 transitions, 8499 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-08-24 00:24:00,379 INFO L231 Difference]: Finished difference. Result has 285 places, 428 transitions, 7505 flow [2023-08-24 00:24:00,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=6122, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7505, PETRI_PLACES=285, PETRI_TRANSITIONS=428} [2023-08-24 00:24:00,380 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-08-24 00:24:00,380 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 428 transitions, 7505 flow [2023-08-24 00:24:00,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.92857142857143) internal successors, (2406), 28 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:00,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:24:00,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:24:00,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-24 00:24:00,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:00,581 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:24:00,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:24:00,581 INFO L85 PathProgramCache]: Analyzing trace with hash 836235758, now seen corresponding path program 19 times [2023-08-24 00:24:00,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:24:00,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656235601] [2023-08-24 00:24:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:24:00,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:24:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:24:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:24:01,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:24:01,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656235601] [2023-08-24 00:24:01,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656235601] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:24:01,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418923402] [2023-08-24 00:24:01,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 00:24:01,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:01,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:24:01,241 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 00:24:01,244 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 00:24:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:24:01,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 00:24:01,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:24:01,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:24:01,741 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 00:24:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:24:01,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:24:02,078 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse5 (forall ((~B~0.offset Int) (v_ArrVal_1791 (Array Int Int)) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork0_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1791) ~B~0.base) (+ ~B~0.offset .cse3)))))) (.cse4 (+ c_~i_BA~0 1))) (and (forall ((~B~0.offset Int) (v_ArrVal_1791 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1791))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 ~B~0.offset 4)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1 4)))) (not (= |c_thread1Thread1of1ForFork0_#t~mem1| (select .cse0 (+ ~B~0.offset .cse3)))))))) (or (< .cse4 c_~An~0) .cse5) (or .cse5 (< .cse4 c_~Bn~0))))) is different from false [2023-08-24 00:24:02,088 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:24:02,089 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 48 treesize of output 36 [2023-08-24 00:24:02,092 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 24 treesize of output 18 [2023-08-24 00:24:02,146 INFO L322 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-24 00:24:02,146 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 154 treesize of output 161 [2023-08-24 00:24:02,164 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:24:02,164 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 94 treesize of output 95 [2023-08-24 00:24:02,440 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:24:02,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2023-08-24 00:24:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:24:02,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418923402] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:24:02,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:24:02,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2023-08-24 00:24:02,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351220012] [2023-08-24 00:24:02,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:24:02,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 00:24:02,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:24:02,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 00:24:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1075, Unknown=1, NotChecked=66, Total=1260 [2023-08-24 00:24:02,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 338 [2023-08-24 00:24:02,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 428 transitions, 7505 flow. Second operand has 36 states, 36 states have (on average 85.55555555555556) internal successors, (3080), 36 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:02,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:24:02,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 338 [2023-08-24 00:24:02,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:24:04,181 INFO L124 PetriNetUnfolderBase]: 1742/3276 cut-off events. [2023-08-24 00:24:04,181 INFO L125 PetriNetUnfolderBase]: For 143475/143475 co-relation queries the response was YES. [2023-08-24 00:24:04,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32025 conditions, 3276 events. 1742/3276 cut-off events. For 143475/143475 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20781 event pairs, 301 based on Foata normal form. 4/3280 useless extension candidates. Maximal degree in co-relation 31908. Up to 3124 conditions per place. [2023-08-24 00:24:04,216 INFO L140 encePairwiseOnDemand]: 328/338 looper letters, 355 selfloop transitions, 73 changer transitions 6/434 dead transitions. [2023-08-24 00:24:04,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 434 transitions, 8342 flow [2023-08-24 00:24:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 00:24:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 00:24:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1227 transitions. [2023-08-24 00:24:04,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2592983939137785 [2023-08-24 00:24:04,218 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1227 transitions. [2023-08-24 00:24:04,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1227 transitions. [2023-08-24 00:24:04,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:24:04,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1227 transitions. [2023-08-24 00:24:04,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:04,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:04,222 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:04,222 INFO L175 Difference]: Start difference. First operand has 285 places, 428 transitions, 7505 flow. Second operand 14 states and 1227 transitions. [2023-08-24 00:24:04,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 434 transitions, 8342 flow [2023-08-24 00:24:04,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 434 transitions, 8177 flow, removed 37 selfloop flow, removed 11 redundant places. [2023-08-24 00:24:04,602 INFO L231 Difference]: Finished difference. Result has 287 places, 419 transitions, 7297 flow [2023-08-24 00:24:04,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7297, PETRI_PLACES=287, PETRI_TRANSITIONS=419} [2023-08-24 00:24:04,602 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 266 predicate places. [2023-08-24 00:24:04,602 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 419 transitions, 7297 flow [2023-08-24 00:24:04,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 85.55555555555556) internal successors, (3080), 36 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:04,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:24:04,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:24:04,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-24 00:24:04,804 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,SelfDestructingSolverStorable44 [2023-08-24 00:24:04,805 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:24:04,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:24:04,805 INFO L85 PathProgramCache]: Analyzing trace with hash 14440816, now seen corresponding path program 11 times [2023-08-24 00:24:04,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:24:04,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277160886] [2023-08-24 00:24:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:24:04,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:24:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:24:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-24 00:24:05,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:24:05,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277160886] [2023-08-24 00:24:05,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277160886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:24:05,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398973821] [2023-08-24 00:24:05,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 00:24:05,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:05,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:24:05,217 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 00:24:05,235 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 00:24:05,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 00:24:05,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:24:05,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 00:24:05,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:24:05,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:24:05,550 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 00:24:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 00:24:05,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:24:05,700 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1842 (Array Int Int)) (~B~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1842))) (let ((.cse0 (select .cse1 ~B~0.base))) (or (= |c_thread1Thread1of1ForFork0_#t~mem1| (select .cse0 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (not (let ((.cse2 (* c_~i_BA~0 4))) (= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ .cse2 4 c_~B~0.offset))))))))) is different from false [2023-08-24 00:24:05,732 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:24:05,733 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 156 treesize of output 178 [2023-08-24 00:24:05,751 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:24:05,751 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 88 treesize of output 89 [2023-08-24 00:24:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-24 00:24:06,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398973821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:24:06,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:24:06,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2023-08-24 00:24:06,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502238785] [2023-08-24 00:24:06,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:24:06,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 00:24:06,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:24:06,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 00:24:06,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=477, Unknown=1, NotChecked=44, Total=600 [2023-08-24 00:24:06,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 338 [2023-08-24 00:24:06,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 419 transitions, 7297 flow. Second operand has 25 states, 25 states have (on average 100.04) internal successors, (2501), 25 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:06,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:24:06,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 338 [2023-08-24 00:24:06,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:24:11,755 INFO L124 PetriNetUnfolderBase]: 1725/3233 cut-off events. [2023-08-24 00:24:11,755 INFO L125 PetriNetUnfolderBase]: For 137413/137413 co-relation queries the response was YES. [2023-08-24 00:24:11,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31403 conditions, 3233 events. 1725/3233 cut-off events. For 137413/137413 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 20300 event pairs, 260 based on Foata normal form. 8/3241 useless extension candidates. Maximal degree in co-relation 31286. Up to 2681 conditions per place. [2023-08-24 00:24:11,790 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 284 selfloop transitions, 161 changer transitions 12/457 dead transitions. [2023-08-24 00:24:11,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 457 transitions, 8730 flow [2023-08-24 00:24:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 00:24:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 00:24:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1650 transitions. [2023-08-24 00:24:11,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.305103550295858 [2023-08-24 00:24:11,792 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1650 transitions. [2023-08-24 00:24:11,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1650 transitions. [2023-08-24 00:24:11,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:24:11,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1650 transitions. [2023-08-24 00:24:11,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 103.125) internal successors, (1650), 16 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:11,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 338.0) internal successors, (5746), 17 states have internal predecessors, (5746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:11,797 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 338.0) internal successors, (5746), 17 states have internal predecessors, (5746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:11,797 INFO L175 Difference]: Start difference. First operand has 287 places, 419 transitions, 7297 flow. Second operand 16 states and 1650 transitions. [2023-08-24 00:24:11,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 457 transitions, 8730 flow [2023-08-24 00:24:12,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 457 transitions, 8485 flow, removed 5 selfloop flow, removed 17 redundant places. [2023-08-24 00:24:12,124 INFO L231 Difference]: Finished difference. Result has 284 places, 423 transitions, 7547 flow [2023-08-24 00:24:12,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=7041, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7547, PETRI_PLACES=284, PETRI_TRANSITIONS=423} [2023-08-24 00:24:12,125 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 263 predicate places. [2023-08-24 00:24:12,125 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 423 transitions, 7547 flow [2023-08-24 00:24:12,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 100.04) internal successors, (2501), 25 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:12,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:24:12,125 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:24:12,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-24 00:24:12,326 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,SelfDestructingSolverStorable45 [2023-08-24 00:24:12,326 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:24:12,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:24:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1592670520, now seen corresponding path program 20 times [2023-08-24 00:24:12,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:24:12,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45321838] [2023-08-24 00:24:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:24:12,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:24:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:24:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:24:12,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:24:12,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45321838] [2023-08-24 00:24:12,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45321838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:24:12,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103270399] [2023-08-24 00:24:12,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:24:12,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:12,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:24:12,450 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 00:24:12,453 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 00:24:12,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:24:12,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:24:12,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 00:24:12,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:24:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:24:12,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:24:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:24:12,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103270399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:24:12,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:24:12,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-08-24 00:24:12,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406672413] [2023-08-24 00:24:12,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:24:12,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 00:24:12,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:24:12,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 00:24:12,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-24 00:24:12,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 338 [2023-08-24 00:24:12,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 423 transitions, 7547 flow. Second operand has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:12,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:24:12,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 338 [2023-08-24 00:24:12,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:24:13,831 INFO L124 PetriNetUnfolderBase]: 2292/4277 cut-off events. [2023-08-24 00:24:13,831 INFO L125 PetriNetUnfolderBase]: For 199721/199721 co-relation queries the response was YES. [2023-08-24 00:24:13,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42761 conditions, 4277 events. 2292/4277 cut-off events. For 199721/199721 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28627 event pairs, 262 based on Foata normal form. 8/4285 useless extension candidates. Maximal degree in co-relation 42648. Up to 2225 conditions per place. [2023-08-24 00:24:13,874 INFO L140 encePairwiseOnDemand]: 334/338 looper letters, 337 selfloop transitions, 225 changer transitions 2/564 dead transitions. [2023-08-24 00:24:13,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 564 transitions, 10879 flow [2023-08-24 00:24:13,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 00:24:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 00:24:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1453 transitions. [2023-08-24 00:24:13,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298816568047337 [2023-08-24 00:24:13,952 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1453 transitions. [2023-08-24 00:24:13,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1453 transitions. [2023-08-24 00:24:13,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:24:13,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1453 transitions. [2023-08-24 00:24:13,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 145.3) internal successors, (1453), 10 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:13,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 338.0) internal successors, (3718), 11 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:13,956 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 338.0) internal successors, (3718), 11 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:13,956 INFO L175 Difference]: Start difference. First operand has 284 places, 423 transitions, 7547 flow. Second operand 10 states and 1453 transitions. [2023-08-24 00:24:13,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 564 transitions, 10879 flow [2023-08-24 00:24:14,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 564 transitions, 10493 flow, removed 27 selfloop flow, removed 14 redundant places. [2023-08-24 00:24:14,439 INFO L231 Difference]: Finished difference. Result has 283 places, 492 transitions, 9371 flow [2023-08-24 00:24:14,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=7165, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9371, PETRI_PLACES=283, PETRI_TRANSITIONS=492} [2023-08-24 00:24:14,440 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 262 predicate places. [2023-08-24 00:24:14,440 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 492 transitions, 9371 flow [2023-08-24 00:24:14,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:14,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:24:14,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:24:14,453 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 00:24:14,647 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,SelfDestructingSolverStorable46 [2023-08-24 00:24:14,647 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:24:14,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:24:14,647 INFO L85 PathProgramCache]: Analyzing trace with hash -338507718, now seen corresponding path program 21 times [2023-08-24 00:24:14,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:24:14,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138246606] [2023-08-24 00:24:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:24:14,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:24:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:24:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:24:14,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:24:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138246606] [2023-08-24 00:24:14,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138246606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:24:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471410701] [2023-08-24 00:24:14,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 00:24:14,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:14,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:24:14,777 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 00:24:14,802 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 00:24:15,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 00:24:15,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:24:15,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 00:24:15,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:24:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:24:15,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:24:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 00:24:15,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471410701] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:24:15,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:24:15,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 3] total 8 [2023-08-24 00:24:15,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5451674] [2023-08-24 00:24:15,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:24:15,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 00:24:15,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:24:15,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 00:24:15,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-24 00:24:15,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 338 [2023-08-24 00:24:15,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 492 transitions, 9371 flow. Second operand has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:15,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:24:15,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 338 [2023-08-24 00:24:15,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:24:16,634 INFO L124 PetriNetUnfolderBase]: 2642/4910 cut-off events. [2023-08-24 00:24:16,634 INFO L125 PetriNetUnfolderBase]: For 259730/259730 co-relation queries the response was YES. [2023-08-24 00:24:16,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52452 conditions, 4910 events. 2642/4910 cut-off events. For 259730/259730 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33814 event pairs, 318 based on Foata normal form. 9/4919 useless extension candidates. Maximal degree in co-relation 52337. Up to 3463 conditions per place. [2023-08-24 00:24:16,761 INFO L140 encePairwiseOnDemand]: 334/338 looper letters, 371 selfloop transitions, 208 changer transitions 2/581 dead transitions. [2023-08-24 00:24:16,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 581 transitions, 12081 flow [2023-08-24 00:24:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 00:24:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 00:24:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1444 transitions. [2023-08-24 00:24:16,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272189349112426 [2023-08-24 00:24:16,763 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1444 transitions. [2023-08-24 00:24:16,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1444 transitions. [2023-08-24 00:24:16,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:24:16,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1444 transitions. [2023-08-24 00:24:16,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 144.4) internal successors, (1444), 10 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:16,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 338.0) internal successors, (3718), 11 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:16,767 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 338.0) internal successors, (3718), 11 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:16,767 INFO L175 Difference]: Start difference. First operand has 283 places, 492 transitions, 9371 flow. Second operand 10 states and 1444 transitions. [2023-08-24 00:24:16,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 581 transitions, 12081 flow [2023-08-24 00:24:17,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 581 transitions, 11828 flow, removed 99 selfloop flow, removed 2 redundant places. [2023-08-24 00:24:17,367 INFO L231 Difference]: Finished difference. Result has 295 places, 529 transitions, 10630 flow [2023-08-24 00:24:17,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=9118, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10630, PETRI_PLACES=295, PETRI_TRANSITIONS=529} [2023-08-24 00:24:17,368 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 274 predicate places. [2023-08-24 00:24:17,368 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 529 transitions, 10630 flow [2023-08-24 00:24:17,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:17,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:24:17,368 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:24:17,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-24 00:24:17,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-24 00:24:17,573 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:24:17,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:24:17,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1391444284, now seen corresponding path program 22 times [2023-08-24 00:24:17,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:24:17,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908469016] [2023-08-24 00:24:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:24:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:24:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:24:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:24:17,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:24:17,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908469016] [2023-08-24 00:24:17,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908469016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:24:17,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359972273] [2023-08-24 00:24:17,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 00:24:17,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:17,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:24:17,686 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 00:24:17,714 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 00:24:17,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 00:24:17,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:24:17,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 00:24:17,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:24:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:24:17,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:24:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:24:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359972273] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:24:18,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:24:18,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-08-24 00:24:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428895596] [2023-08-24 00:24:18,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:24:18,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 00:24:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:24:18,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 00:24:18,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-24 00:24:18,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 338 [2023-08-24 00:24:18,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 529 transitions, 10630 flow. Second operand has 18 states, 18 states have (on average 133.27777777777777) internal successors, (2399), 18 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:18,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:24:18,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 338 [2023-08-24 00:24:18,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:24:20,463 INFO L124 PetriNetUnfolderBase]: 3190/5903 cut-off events. [2023-08-24 00:24:20,464 INFO L125 PetriNetUnfolderBase]: For 349443/349443 co-relation queries the response was YES. [2023-08-24 00:24:20,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66998 conditions, 5903 events. 3190/5903 cut-off events. For 349443/349443 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41845 event pairs, 372 based on Foata normal form. 61/5964 useless extension candidates. Maximal degree in co-relation 66877. Up to 2233 conditions per place. [2023-08-24 00:24:20,544 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 459 selfloop transitions, 287 changer transitions 3/749 dead transitions. [2023-08-24 00:24:20,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 749 transitions, 16296 flow [2023-08-24 00:24:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 00:24:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 00:24:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3187 transitions. [2023-08-24 00:24:20,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099562644713146 [2023-08-24 00:24:20,548 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3187 transitions. [2023-08-24 00:24:20,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3187 transitions. [2023-08-24 00:24:20,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:24:20,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3187 transitions. [2023-08-24 00:24:20,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 138.56521739130434) internal successors, (3187), 23 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:20,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 338.0) internal successors, (8112), 24 states have internal predecessors, (8112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:20,555 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 338.0) internal successors, (8112), 24 states have internal predecessors, (8112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:20,555 INFO L175 Difference]: Start difference. First operand has 295 places, 529 transitions, 10630 flow. Second operand 23 states and 3187 transitions. [2023-08-24 00:24:20,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 749 transitions, 16296 flow [2023-08-24 00:24:21,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 749 transitions, 15878 flow, removed 157 selfloop flow, removed 4 redundant places. [2023-08-24 00:24:21,648 INFO L231 Difference]: Finished difference. Result has 327 places, 595 transitions, 12913 flow [2023-08-24 00:24:21,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=10306, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12913, PETRI_PLACES=327, PETRI_TRANSITIONS=595} [2023-08-24 00:24:21,649 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 306 predicate places. [2023-08-24 00:24:21,649 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 595 transitions, 12913 flow [2023-08-24 00:24:21,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.27777777777777) internal successors, (2399), 18 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:21,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:24:21,650 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:24:21,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-24 00:24:21,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:21,856 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:24:21,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:24:21,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2057752818, now seen corresponding path program 12 times [2023-08-24 00:24:21,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:24:21,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001532220] [2023-08-24 00:24:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:24:21,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:24:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:24:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 00:24:21,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:24:21,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001532220] [2023-08-24 00:24:21,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001532220] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:24:21,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648212587] [2023-08-24 00:24:21,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 00:24:21,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:21,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:24:21,978 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 00:24:22,004 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 00:24:22,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 00:24:22,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:24:22,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 00:24:22,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:24:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 00:24:22,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:24:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 00:24:22,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648212587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:24:22,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:24:22,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 00:24:22,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670391247] [2023-08-24 00:24:22,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:24:22,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 00:24:22,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:24:22,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 00:24:22,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-08-24 00:24:22,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:24:22,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 595 transitions, 12913 flow. Second operand has 18 states, 18 states have (on average 116.61111111111111) internal successors, (2099), 18 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:22,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:24:22,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:24:22,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:24:24,896 INFO L124 PetriNetUnfolderBase]: 4083/7627 cut-off events. [2023-08-24 00:24:24,896 INFO L125 PetriNetUnfolderBase]: For 491893/491893 co-relation queries the response was YES. [2023-08-24 00:24:24,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92771 conditions, 7627 events. 4083/7627 cut-off events. For 491893/491893 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 56144 event pairs, 1735 based on Foata normal form. 160/7787 useless extension candidates. Maximal degree in co-relation 92103. Up to 5902 conditions per place. [2023-08-24 00:24:25,007 INFO L140 encePairwiseOnDemand]: 333/338 looper letters, 736 selfloop transitions, 73 changer transitions 44/853 dead transitions. [2023-08-24 00:24:25,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 853 transitions, 20150 flow [2023-08-24 00:24:25,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 00:24:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 00:24:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 963 transitions. [2023-08-24 00:24:25,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35613905325443784 [2023-08-24 00:24:25,009 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 963 transitions. [2023-08-24 00:24:25,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 963 transitions. [2023-08-24 00:24:25,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:24:25,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 963 transitions. [2023-08-24 00:24:25,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.375) internal successors, (963), 8 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:25,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:25,012 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:25,012 INFO L175 Difference]: Start difference. First operand has 327 places, 595 transitions, 12913 flow. Second operand 8 states and 963 transitions. [2023-08-24 00:24:25,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 853 transitions, 20150 flow [2023-08-24 00:24:27,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 853 transitions, 18905 flow, removed 588 selfloop flow, removed 2 redundant places. [2023-08-24 00:24:27,042 INFO L231 Difference]: Finished difference. Result has 336 places, 665 transitions, 14218 flow [2023-08-24 00:24:27,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=12090, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14218, PETRI_PLACES=336, PETRI_TRANSITIONS=665} [2023-08-24 00:24:27,043 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-08-24 00:24:27,043 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 665 transitions, 14218 flow [2023-08-24 00:24:27,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 116.61111111111111) internal successors, (2099), 18 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:27,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:24:27,043 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:24:27,048 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 00:24:27,243 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,SelfDestructingSolverStorable49 [2023-08-24 00:24:27,244 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:24:27,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:24:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2069835548, now seen corresponding path program 23 times [2023-08-24 00:24:27,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:24:27,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291429086] [2023-08-24 00:24:27,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:24:27,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:24:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:24:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 00:24:27,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:24:27,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291429086] [2023-08-24 00:24:27,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291429086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:24:27,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213367258] [2023-08-24 00:24:27,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 00:24:27,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:27,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:24:27,437 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 00:24:27,448 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 00:24:27,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 00:24:27,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:24:27,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 00:24:27,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:24:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 00:24:27,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:24:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 00:24:27,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213367258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:24:27,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:24:27,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 00:24:27,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762304906] [2023-08-24 00:24:27,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:24:27,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 00:24:27,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:24:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 00:24:27,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-08-24 00:24:27,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:24:27,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 665 transitions, 14218 flow. Second operand has 18 states, 18 states have (on average 116.88888888888889) internal successors, (2104), 18 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:27,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:24:27,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:24:27,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:24:29,898 INFO L124 PetriNetUnfolderBase]: 3627/6817 cut-off events. [2023-08-24 00:24:29,898 INFO L125 PetriNetUnfolderBase]: For 405783/405783 co-relation queries the response was YES. [2023-08-24 00:24:29,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78388 conditions, 6817 events. 3627/6817 cut-off events. For 405783/405783 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 49802 event pairs, 1665 based on Foata normal form. 108/6925 useless extension candidates. Maximal degree in co-relation 77715. Up to 5902 conditions per place. [2023-08-24 00:24:29,993 INFO L140 encePairwiseOnDemand]: 334/338 looper letters, 592 selfloop transitions, 4 changer transitions 173/769 dead transitions. [2023-08-24 00:24:29,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 769 transitions, 17384 flow [2023-08-24 00:24:29,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 00:24:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 00:24:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 963 transitions. [2023-08-24 00:24:29,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35613905325443784 [2023-08-24 00:24:29,995 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 963 transitions. [2023-08-24 00:24:29,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 963 transitions. [2023-08-24 00:24:29,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:24:29,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 963 transitions. [2023-08-24 00:24:29,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.375) internal successors, (963), 8 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:29,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:29,997 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 338.0) internal successors, (3042), 9 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:29,998 INFO L175 Difference]: Start difference. First operand has 336 places, 665 transitions, 14218 flow. Second operand 8 states and 963 transitions. [2023-08-24 00:24:29,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 769 transitions, 17384 flow [2023-08-24 00:24:31,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 769 transitions, 17239 flow, removed 55 selfloop flow, removed 4 redundant places. [2023-08-24 00:24:31,712 INFO L231 Difference]: Finished difference. Result has 342 places, 596 transitions, 12371 flow [2023-08-24 00:24:31,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=13625, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12371, PETRI_PLACES=342, PETRI_TRANSITIONS=596} [2023-08-24 00:24:31,713 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 321 predicate places. [2023-08-24 00:24:31,713 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 596 transitions, 12371 flow [2023-08-24 00:24:31,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 116.88888888888889) internal successors, (2104), 18 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:31,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:24:31,713 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:24:31,719 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 00:24:31,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:31,914 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:24:31,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:24:31,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1976601092, now seen corresponding path program 13 times [2023-08-24 00:24:31,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:24:31,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454101289] [2023-08-24 00:24:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:24:31,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:24:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:24:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:24:32,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:24:32,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454101289] [2023-08-24 00:24:32,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454101289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:24:32,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506628307] [2023-08-24 00:24:32,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 00:24:32,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:24:32,011 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 00:24:32,013 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 00:24:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:24:32,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 00:24:32,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:24:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:24:32,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:24:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:24:32,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506628307] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:24:32,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:24:32,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 00:24:32,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672637157] [2023-08-24 00:24:32,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:24:32,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 00:24:32,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:24:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 00:24:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-08-24 00:24:32,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:24:32,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 596 transitions, 12371 flow. Second operand has 20 states, 20 states have (on average 116.25) internal successors, (2325), 20 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:32,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:24:32,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:24:32,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:24:33,944 INFO L124 PetriNetUnfolderBase]: 2721/5156 cut-off events. [2023-08-24 00:24:33,944 INFO L125 PetriNetUnfolderBase]: For 348515/348515 co-relation queries the response was YES. [2023-08-24 00:24:33,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61591 conditions, 5156 events. 2721/5156 cut-off events. For 348515/348515 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36193 event pairs, 697 based on Foata normal form. 135/5291 useless extension candidates. Maximal degree in co-relation 61465. Up to 3901 conditions per place. [2023-08-24 00:24:34,004 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 455 selfloop transitions, 56 changer transitions 36/547 dead transitions. [2023-08-24 00:24:34,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 547 transitions, 12117 flow [2023-08-24 00:24:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 00:24:34,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 00:24:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1196 transitions. [2023-08-24 00:24:34,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35384615384615387 [2023-08-24 00:24:34,006 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1196 transitions. [2023-08-24 00:24:34,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1196 transitions. [2023-08-24 00:24:34,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:24:34,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1196 transitions. [2023-08-24 00:24:34,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 119.6) internal successors, (1196), 10 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:34,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 338.0) internal successors, (3718), 11 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:34,009 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 338.0) internal successors, (3718), 11 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:34,009 INFO L175 Difference]: Start difference. First operand has 342 places, 596 transitions, 12371 flow. Second operand 10 states and 1196 transitions. [2023-08-24 00:24:34,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 547 transitions, 12117 flow [2023-08-24 00:24:35,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 547 transitions, 11542 flow, removed 202 selfloop flow, removed 18 redundant places. [2023-08-24 00:24:35,217 INFO L231 Difference]: Finished difference. Result has 320 places, 452 transitions, 9096 flow [2023-08-24 00:24:35,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=9114, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9096, PETRI_PLACES=320, PETRI_TRANSITIONS=452} [2023-08-24 00:24:35,218 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 299 predicate places. [2023-08-24 00:24:35,218 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 452 transitions, 9096 flow [2023-08-24 00:24:35,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 116.25) internal successors, (2325), 20 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:35,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:24:35,219 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:24:35,224 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 00:24:35,419 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,SelfDestructingSolverStorable51 [2023-08-24 00:24:35,420 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:24:35,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:24:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash -486854261, now seen corresponding path program 14 times [2023-08-24 00:24:35,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:24:35,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482747869] [2023-08-24 00:24:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:24:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:24:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:24:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:24:36,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:24:36,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482747869] [2023-08-24 00:24:36,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482747869] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:24:36,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485595792] [2023-08-24 00:24:36,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:24:36,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:24:36,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:24:36,090 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 00:24:36,092 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 00:24:36,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:24:36,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:24:36,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 00:24:36,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:24:36,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 00:24:36,685 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 00:24:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:24:36,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:24:39,399 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse4 (forall ((~B~0.offset Int) (v_ArrVal_2177 (Array Int Int)) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2177) ~B~0.base) (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork0_#t~mem1|)))) (.cse5 (+ c_~i_BA~0 1))) (and (forall ((~B~0.offset Int) (v_ArrVal_2177 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2177))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 ~B~0.offset 4)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1 4)))) (not (= (select .cse0 (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork0_#t~mem1|)))))) (or .cse4 (< .cse5 c_~Bn~0)) (or .cse4 (< .cse5 c_~An~0))))) is different from false [2023-08-24 00:24:39,450 INFO L322 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-24 00:24:39,450 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 154 treesize of output 161 [2023-08-24 00:24:39,469 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 00:24:39,469 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 94 treesize of output 95 [2023-08-24 00:24:39,856 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:24:39,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2023-08-24 00:24:39,864 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:24:39,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2023-08-24 00:24:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:24:40,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485595792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:24:40,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:24:40,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 41 [2023-08-24 00:24:40,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134019016] [2023-08-24 00:24:40,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:24:40,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-24 00:24:40,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:24:40,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-24 00:24:40,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1460, Unknown=1, NotChecked=78, Total=1722 [2023-08-24 00:24:40,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 338 [2023-08-24 00:24:40,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 452 transitions, 9096 flow. Second operand has 42 states, 42 states have (on average 85.5952380952381) internal successors, (3595), 42 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:24:40,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:24:40,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 338 [2023-08-24 00:24:40,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:24:40,912 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~i_BA~0 1)) (.cse5 (* c_~i_AB~0 4)) (.cse2 (* c_~i_BA~0 4))) (let ((.cse4 (+ c_~A~0.offset .cse2 4)) (.cse7 (select |c_#memory_int| c_~A~0.base)) (.cse11 (forall ((~B~0.offset Int) (~B~0.base Int)) (not (= (select (select |c_#memory_int| ~B~0.base) (+ ~B~0.offset .cse5)) |c_thread1Thread1of1ForFork0_#t~mem1|)))) (.cse10 (< .cse0 c_~Bn~0)) (.cse9 (forall ((~B~0.offset Int) (v_ArrVal_2177 (Array Int Int)) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2177) ~B~0.base) (+ ~B~0.offset .cse5)) |c_thread1Thread1of1ForFork0_#t~mem1|)))) (.cse8 (< .cse0 c_~An~0))) (and (= c_~i_AB~0 .cse0) (forall ((~B~0.offset Int) (v_ArrVal_2177 (Array Int Int)) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2177))) (let ((.cse1 (select .cse3 ~B~0.base))) (or (= (select .cse1 (+ .cse2 ~B~0.offset 4)) (select (select .cse3 c_~A~0.base) .cse4)) (not (= (select .cse1 (+ ~B~0.offset .cse5)) |c_thread1Thread1of1ForFork0_#t~mem1|)))))) (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse6 (select |c_#memory_int| ~B~0.base))) (or (not (= (select .cse6 (+ ~B~0.offset .cse5)) |c_thread1Thread1of1ForFork0_#t~mem1|)) (= (select .cse7 .cse4) (select .cse6 (+ .cse2 ~B~0.offset 4)))))) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) .cse8 (< c_~i_BA~0 c_~An~0) (< c_~i_BA~0 c_~Bn~0) (or .cse9 .cse10) (= (select .cse7 (+ c_~A~0.offset .cse2)) (select (select |c_#memory_int| c_~B~0.base) (+ .cse2 c_~B~0.offset))) .cse10 (or .cse11 .cse8) (or .cse11 .cse10) (or .cse9 .cse8)))) is different from false [2023-08-24 00:24:50,917 WARN L539 Checker$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 00:24:52,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 00:24:55,283 WARN L539 Checker$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 00:25:03,968 WARN L234 SmtUtils]: Spent 7.71s on a formula simplification. DAG size of input: 65 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 00:25:07,766 INFO L124 PetriNetUnfolderBase]: 2728/5176 cut-off events. [2023-08-24 00:25:07,766 INFO L125 PetriNetUnfolderBase]: For 324305/324305 co-relation queries the response was YES. [2023-08-24 00:25:07,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58864 conditions, 5176 events. 2728/5176 cut-off events. For 324305/324305 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 35878 event pairs, 994 based on Foata normal form. 35/5211 useless extension candidates. Maximal degree in co-relation 58748. Up to 4726 conditions per place. [2023-08-24 00:25:07,823 INFO L140 encePairwiseOnDemand]: 324/338 looper letters, 398 selfloop transitions, 133 changer transitions 5/536 dead transitions. [2023-08-24 00:25:07,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 536 transitions, 11280 flow [2023-08-24 00:25:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 00:25:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 00:25:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2828 transitions. [2023-08-24 00:25:07,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2614644970414201 [2023-08-24 00:25:07,826 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2828 transitions. [2023-08-24 00:25:07,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2828 transitions. [2023-08-24 00:25:07,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:25:07,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2828 transitions. [2023-08-24 00:25:07,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 88.375) internal successors, (2828), 32 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:07,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 338.0) internal successors, (11154), 33 states have internal predecessors, (11154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:07,833 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 338.0) internal successors, (11154), 33 states have internal predecessors, (11154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:07,833 INFO L175 Difference]: Start difference. First operand has 320 places, 452 transitions, 9096 flow. Second operand 32 states and 2828 transitions. [2023-08-24 00:25:07,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 536 transitions, 11280 flow [2023-08-24 00:25:08,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 536 transitions, 11240 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-24 00:25:08,689 INFO L231 Difference]: Finished difference. Result has 353 places, 472 transitions, 9814 flow [2023-08-24 00:25:08,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=9056, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9814, PETRI_PLACES=353, PETRI_TRANSITIONS=472} [2023-08-24 00:25:08,690 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 332 predicate places. [2023-08-24 00:25:08,690 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 472 transitions, 9814 flow [2023-08-24 00:25:08,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 85.5952380952381) internal successors, (3595), 42 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:08,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:25:08,691 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:25:08,696 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 00:25:08,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:25:08,891 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:25:08,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:25:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash 578691112, now seen corresponding path program 24 times [2023-08-24 00:25:08,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:25:08,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456453895] [2023-08-24 00:25:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:25:08,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:25:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:25:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 00:25:09,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:25:09,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456453895] [2023-08-24 00:25:09,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456453895] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:25:09,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850938234] [2023-08-24 00:25:09,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 00:25:09,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:25:09,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:25:09,004 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 00:25:09,031 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 00:25:09,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 00:25:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:25:09,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 00:25:09,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:25:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 00:25:09,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:25:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 00:25:09,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850938234] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:25:09,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:25:09,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 00:25:09,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862119840] [2023-08-24 00:25:09,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:25:09,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 00:25:09,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:25:09,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 00:25:09,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-08-24 00:25:09,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 338 [2023-08-24 00:25:09,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 472 transitions, 9814 flow. Second operand has 20 states, 20 states have (on average 116.5) internal successors, (2330), 20 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:09,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:25:09,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 338 [2023-08-24 00:25:09,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:25:10,881 INFO L124 PetriNetUnfolderBase]: 2446/4665 cut-off events. [2023-08-24 00:25:10,881 INFO L125 PetriNetUnfolderBase]: For 306869/306869 co-relation queries the response was YES. [2023-08-24 00:25:10,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54433 conditions, 4665 events. 2446/4665 cut-off events. For 306869/306869 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 31854 event pairs, 602 based on Foata normal form. 80/4745 useless extension candidates. Maximal degree in co-relation 54309. Up to 3829 conditions per place. [2023-08-24 00:25:10,941 INFO L140 encePairwiseOnDemand]: 333/338 looper letters, 345 selfloop transitions, 43 changer transitions 104/492 dead transitions. [2023-08-24 00:25:10,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 492 transitions, 10857 flow [2023-08-24 00:25:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 00:25:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 00:25:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1197 transitions. [2023-08-24 00:25:10,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35414201183431954 [2023-08-24 00:25:10,943 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1197 transitions. [2023-08-24 00:25:10,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1197 transitions. [2023-08-24 00:25:10,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:25:10,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1197 transitions. [2023-08-24 00:25:10,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 119.7) internal successors, (1197), 10 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:10,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 338.0) internal successors, (3718), 11 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:10,947 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 338.0) internal successors, (3718), 11 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:10,947 INFO L175 Difference]: Start difference. First operand has 353 places, 472 transitions, 9814 flow. Second operand 10 states and 1197 transitions. [2023-08-24 00:25:10,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 492 transitions, 10857 flow [2023-08-24 00:25:11,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 492 transitions, 10632 flow, removed 30 selfloop flow, removed 18 redundant places. [2023-08-24 00:25:11,719 INFO L231 Difference]: Finished difference. Result has 345 places, 384 transitions, 7793 flow [2023-08-24 00:25:11,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=9353, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7793, PETRI_PLACES=345, PETRI_TRANSITIONS=384} [2023-08-24 00:25:11,720 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 324 predicate places. [2023-08-24 00:25:11,720 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 384 transitions, 7793 flow [2023-08-24 00:25:11,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 116.5) internal successors, (2330), 20 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:11,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:25:11,720 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:25:11,726 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 00:25:11,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:25:11,921 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:25:11,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:25:11,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1476287557, now seen corresponding path program 25 times [2023-08-24 00:25:11,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:25:11,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007673490] [2023-08-24 00:25:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:25:11,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:25:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:25:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:25:12,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:25:12,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007673490] [2023-08-24 00:25:12,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007673490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:25:12,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105275698] [2023-08-24 00:25:12,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 00:25:12,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:25:12,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:25:12,155 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 00:25:12,158 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 00:25:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:25:12,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 00:25:12,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:25:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:25:12,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:25:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:25:12,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105275698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:25:12,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:25:12,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-24 00:25:12,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695195646] [2023-08-24 00:25:12,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:25:12,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 00:25:12,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:25:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 00:25:12,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-08-24 00:25:12,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 338 [2023-08-24 00:25:12,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 384 transitions, 7793 flow. Second operand has 30 states, 30 states have (on average 112.83333333333333) internal successors, (3385), 30 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:12,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:25:12,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 338 [2023-08-24 00:25:12,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:25:14,209 INFO L124 PetriNetUnfolderBase]: 2380/4415 cut-off events. [2023-08-24 00:25:14,210 INFO L125 PetriNetUnfolderBase]: For 289869/289869 co-relation queries the response was YES. [2023-08-24 00:25:14,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51712 conditions, 4415 events. 2380/4415 cut-off events. For 289869/289869 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29424 event pairs, 256 based on Foata normal form. 71/4486 useless extension candidates. Maximal degree in co-relation 51590. Up to 1523 conditions per place. [2023-08-24 00:25:14,263 INFO L140 encePairwiseOnDemand]: 330/338 looper letters, 331 selfloop transitions, 175 changer transitions 1/507 dead transitions. [2023-08-24 00:25:14,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 507 transitions, 11114 flow [2023-08-24 00:25:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 00:25:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 00:25:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1615 transitions. [2023-08-24 00:25:14,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412933220625528 [2023-08-24 00:25:14,265 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1615 transitions. [2023-08-24 00:25:14,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1615 transitions. [2023-08-24 00:25:14,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:25:14,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1615 transitions. [2023-08-24 00:25:14,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 115.35714285714286) internal successors, (1615), 14 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:14,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:14,270 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 338.0) internal successors, (5070), 15 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:14,270 INFO L175 Difference]: Start difference. First operand has 345 places, 384 transitions, 7793 flow. Second operand 14 states and 1615 transitions. [2023-08-24 00:25:14,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 507 transitions, 11114 flow [2023-08-24 00:25:15,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 507 transitions, 10822 flow, removed 63 selfloop flow, removed 25 redundant places. [2023-08-24 00:25:15,024 INFO L231 Difference]: Finished difference. Result has 313 places, 419 transitions, 8850 flow [2023-08-24 00:25:15,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=7399, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8850, PETRI_PLACES=313, PETRI_TRANSITIONS=419} [2023-08-24 00:25:15,024 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2023-08-24 00:25:15,025 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 419 transitions, 8850 flow [2023-08-24 00:25:15,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 112.83333333333333) internal successors, (3385), 30 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:15,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:25:15,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:25:15,031 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 00:25:15,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-24 00:25:15,226 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:25:15,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:25:15,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1905101170, now seen corresponding path program 26 times [2023-08-24 00:25:15,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:25:15,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630696244] [2023-08-24 00:25:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:25:15,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:25:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:25:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:25:15,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:25:15,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630696244] [2023-08-24 00:25:15,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630696244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:25:15,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060587697] [2023-08-24 00:25:15,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:25:15,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:25:15,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:25:15,941 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 00:25:15,945 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 00:25:16,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:25:16,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:25:16,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 00:25:16,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:25:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:25:16,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:25:16,894 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:25:16,894 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 20 treesize of output 4 [2023-08-24 00:25:16,930 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:25:16,931 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 42 treesize of output 60 [2023-08-24 00:25:16,951 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 00:25:16,952 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 20 treesize of output 4 [2023-08-24 00:25:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:25:17,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060587697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:25:17,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:25:17,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2023-08-24 00:25:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643436705] [2023-08-24 00:25:17,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:25:17,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 00:25:17,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:25:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 00:25:17,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1753, Unknown=0, NotChecked=0, Total=1980 [2023-08-24 00:25:17,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:25:17,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 419 transitions, 8850 flow. Second operand has 45 states, 45 states have (on average 89.66666666666667) internal successors, (4035), 45 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:17,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:25:17,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:25:17,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:25:19,113 INFO L124 PetriNetUnfolderBase]: 2455/4545 cut-off events. [2023-08-24 00:25:19,114 INFO L125 PetriNetUnfolderBase]: For 267660/267660 co-relation queries the response was YES. [2023-08-24 00:25:19,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52677 conditions, 4545 events. 2455/4545 cut-off events. For 267660/267660 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 30558 event pairs, 558 based on Foata normal form. 12/4557 useless extension candidates. Maximal degree in co-relation 52561. Up to 4165 conditions per place. [2023-08-24 00:25:19,171 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 399 selfloop transitions, 68 changer transitions 0/467 dead transitions. [2023-08-24 00:25:19,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 467 transitions, 10498 flow [2023-08-24 00:25:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 00:25:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 00:25:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1574 transitions. [2023-08-24 00:25:19,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.273929690219283 [2023-08-24 00:25:19,174 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1574 transitions. [2023-08-24 00:25:19,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1574 transitions. [2023-08-24 00:25:19,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:25:19,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1574 transitions. [2023-08-24 00:25:19,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.58823529411765) internal successors, (1574), 17 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:19,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 338.0) internal successors, (6084), 18 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:19,180 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 338.0) internal successors, (6084), 18 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:19,180 INFO L175 Difference]: Start difference. First operand has 313 places, 419 transitions, 8850 flow. Second operand 17 states and 1574 transitions. [2023-08-24 00:25:19,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 467 transitions, 10498 flow [2023-08-24 00:25:20,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 467 transitions, 10390 flow, removed 10 selfloop flow, removed 13 redundant places. [2023-08-24 00:25:20,100 INFO L231 Difference]: Finished difference. Result has 320 places, 434 transitions, 9265 flow [2023-08-24 00:25:20,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=8754, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9265, PETRI_PLACES=320, PETRI_TRANSITIONS=434} [2023-08-24 00:25:20,101 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 299 predicate places. [2023-08-24 00:25:20,101 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 434 transitions, 9265 flow [2023-08-24 00:25:20,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 89.66666666666667) internal successors, (4035), 45 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:20,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:25:20,101 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:25:20,108 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 00:25:20,307 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,SelfDestructingSolverStorable55 [2023-08-24 00:25:20,307 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:25:20,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:25:20,308 INFO L85 PathProgramCache]: Analyzing trace with hash 297923533, now seen corresponding path program 15 times [2023-08-24 00:25:20,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:25:20,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605437468] [2023-08-24 00:25:20,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:25:20,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:25:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:25:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:25:20,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:25:20,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605437468] [2023-08-24 00:25:20,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605437468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:25:20,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187104595] [2023-08-24 00:25:20,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 00:25:20,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:25:20,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:25:20,809 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 00:25:20,832 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 00:25:21,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 00:25:21,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:25:21,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 00:25:21,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:25:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:25:21,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:25:21,665 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:25:21,665 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 42 treesize of output 60 [2023-08-24 00:25:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:25:22,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187104595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:25:22,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:25:22,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 38 [2023-08-24 00:25:22,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827426322] [2023-08-24 00:25:22,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:25:22,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 00:25:22,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:25:22,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 00:25:22,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 00:25:22,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 338 [2023-08-24 00:25:22,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 434 transitions, 9265 flow. Second operand has 39 states, 39 states have (on average 92.82051282051282) internal successors, (3620), 39 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:22,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:25:22,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 338 [2023-08-24 00:25:22,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:25:25,920 INFO L124 PetriNetUnfolderBase]: 3878/7354 cut-off events. [2023-08-24 00:25:25,920 INFO L125 PetriNetUnfolderBase]: For 408671/408671 co-relation queries the response was YES. [2023-08-24 00:25:25,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83479 conditions, 7354 events. 3878/7354 cut-off events. For 408671/408671 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 55298 event pairs, 730 based on Foata normal form. 25/7379 useless extension candidates. Maximal degree in co-relation 83361. Up to 4093 conditions per place. [2023-08-24 00:25:26,008 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 507 selfloop transitions, 337 changer transitions 57/901 dead transitions. [2023-08-24 00:25:26,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 901 transitions, 20579 flow [2023-08-24 00:25:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 00:25:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 00:25:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3788 transitions. [2023-08-24 00:25:26,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.287361553633743 [2023-08-24 00:25:26,013 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3788 transitions. [2023-08-24 00:25:26,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3788 transitions. [2023-08-24 00:25:26,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:25:26,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3788 transitions. [2023-08-24 00:25:26,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 97.12820512820512) internal successors, (3788), 39 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:26,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 338.0) internal successors, (13520), 40 states have internal predecessors, (13520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:26,027 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 338.0) internal successors, (13520), 40 states have internal predecessors, (13520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:26,027 INFO L175 Difference]: Start difference. First operand has 320 places, 434 transitions, 9265 flow. Second operand 39 states and 3788 transitions. [2023-08-24 00:25:26,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 901 transitions, 20579 flow [2023-08-24 00:25:27,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 901 transitions, 20014 flow, removed 185 selfloop flow, removed 12 redundant places. [2023-08-24 00:25:27,238 INFO L231 Difference]: Finished difference. Result has 362 places, 683 transitions, 16283 flow [2023-08-24 00:25:27,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=9106, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=16283, PETRI_PLACES=362, PETRI_TRANSITIONS=683} [2023-08-24 00:25:27,239 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 341 predicate places. [2023-08-24 00:25:27,239 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 683 transitions, 16283 flow [2023-08-24 00:25:27,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 92.82051282051282) internal successors, (3620), 39 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:27,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:25:27,240 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:25:27,248 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 00:25:27,446 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,SelfDestructingSolverStorable56 [2023-08-24 00:25:27,447 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:25:27,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:25:27,447 INFO L85 PathProgramCache]: Analyzing trace with hash 939569039, now seen corresponding path program 16 times [2023-08-24 00:25:27,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:25:27,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657913408] [2023-08-24 00:25:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:25:27,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:25:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:25:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:25:27,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:25:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657913408] [2023-08-24 00:25:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657913408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:25:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495385059] [2023-08-24 00:25:27,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 00:25:27,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:25:27,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:25:27,917 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 00:25:27,941 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 00:25:28,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 00:25:28,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:25:28,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 00:25:28,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:25:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:25:28,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:25:28,565 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:25:28,565 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 42 treesize of output 60 [2023-08-24 00:25:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:25:28,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495385059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:25:28,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:25:28,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 27 [2023-08-24 00:25:28,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365229060] [2023-08-24 00:25:28,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:25:28,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 00:25:28,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:25:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 00:25:28,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2023-08-24 00:25:28,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 338 [2023-08-24 00:25:28,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 683 transitions, 16283 flow. Second operand has 28 states, 28 states have (on average 104.25) internal successors, (2919), 28 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:28,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:25:28,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 338 [2023-08-24 00:25:28,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:25:32,140 INFO L124 PetriNetUnfolderBase]: 3822/7321 cut-off events. [2023-08-24 00:25:32,140 INFO L125 PetriNetUnfolderBase]: For 425970/425970 co-relation queries the response was YES. [2023-08-24 00:25:32,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85877 conditions, 7321 events. 3822/7321 cut-off events. For 425970/425970 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 55639 event pairs, 681 based on Foata normal form. 24/7345 useless extension candidates. Maximal degree in co-relation 85743. Up to 4650 conditions per place. [2023-08-24 00:25:32,326 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 428 selfloop transitions, 340 changer transitions 31/799 dead transitions. [2023-08-24 00:25:32,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 799 transitions, 19820 flow [2023-08-24 00:25:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 00:25:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 00:25:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2164 transitions. [2023-08-24 00:25:32,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3201183431952663 [2023-08-24 00:25:32,329 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2164 transitions. [2023-08-24 00:25:32,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2164 transitions. [2023-08-24 00:25:32,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:25:32,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2164 transitions. [2023-08-24 00:25:32,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 108.2) internal successors, (2164), 20 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:32,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 338.0) internal successors, (7098), 21 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:32,336 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 338.0) internal successors, (7098), 21 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:32,336 INFO L175 Difference]: Start difference. First operand has 362 places, 683 transitions, 16283 flow. Second operand 20 states and 2164 transitions. [2023-08-24 00:25:32,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 799 transitions, 19820 flow [2023-08-24 00:25:33,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 799 transitions, 19115 flow, removed 345 selfloop flow, removed 9 redundant places. [2023-08-24 00:25:33,976 INFO L231 Difference]: Finished difference. Result has 373 places, 721 transitions, 17350 flow [2023-08-24 00:25:33,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=15648, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=17350, PETRI_PLACES=373, PETRI_TRANSITIONS=721} [2023-08-24 00:25:33,977 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 352 predicate places. [2023-08-24 00:25:33,977 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 721 transitions, 17350 flow [2023-08-24 00:25:33,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 104.25) internal successors, (2919), 28 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:33,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:25:33,977 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:25:33,983 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 00:25:34,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-24 00:25:34,178 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:25:34,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:25:34,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1144933025, now seen corresponding path program 17 times [2023-08-24 00:25:34,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:25:34,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25792637] [2023-08-24 00:25:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:25:34,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:25:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:25:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:25:34,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:25:34,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25792637] [2023-08-24 00:25:34,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25792637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:25:34,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827977570] [2023-08-24 00:25:34,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 00:25:34,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:25:34,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:25:34,594 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 00:25:34,596 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 00:25:34,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 00:25:34,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:25:34,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 00:25:34,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:25:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:25:34,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:25:35,100 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:25:35,100 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 42 treesize of output 60 [2023-08-24 00:25:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:25:35,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827977570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:25:35,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:25:35,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 24 [2023-08-24 00:25:35,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557535231] [2023-08-24 00:25:35,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:25:35,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 00:25:35,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:25:35,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 00:25:35,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2023-08-24 00:25:35,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 338 [2023-08-24 00:25:35,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 721 transitions, 17350 flow. Second operand has 25 states, 25 states have (on average 104.04) internal successors, (2601), 25 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:35,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:25:35,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 338 [2023-08-24 00:25:35,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:25:38,265 INFO L124 PetriNetUnfolderBase]: 3805/7250 cut-off events. [2023-08-24 00:25:38,265 INFO L125 PetriNetUnfolderBase]: For 430322/430322 co-relation queries the response was YES. [2023-08-24 00:25:38,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86586 conditions, 7250 events. 3805/7250 cut-off events. For 430322/430322 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 54549 event pairs, 683 based on Foata normal form. 12/7262 useless extension candidates. Maximal degree in co-relation 86449. Up to 4551 conditions per place. [2023-08-24 00:25:38,461 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 422 selfloop transitions, 374 changer transitions 2/798 dead transitions. [2023-08-24 00:25:38,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 798 transitions, 20600 flow [2023-08-24 00:25:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 00:25:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 00:25:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2478 transitions. [2023-08-24 00:25:38,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3187548237715462 [2023-08-24 00:25:38,463 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2478 transitions. [2023-08-24 00:25:38,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2478 transitions. [2023-08-24 00:25:38,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:25:38,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2478 transitions. [2023-08-24 00:25:38,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 107.73913043478261) internal successors, (2478), 23 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:38,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 338.0) internal successors, (8112), 24 states have internal predecessors, (8112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:38,468 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 338.0) internal successors, (8112), 24 states have internal predecessors, (8112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:38,468 INFO L175 Difference]: Start difference. First operand has 373 places, 721 transitions, 17350 flow. Second operand 23 states and 2478 transitions. [2023-08-24 00:25:38,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 798 transitions, 20600 flow [2023-08-24 00:25:39,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 798 transitions, 20061 flow, removed 47 selfloop flow, removed 11 redundant places. [2023-08-24 00:25:40,008 INFO L231 Difference]: Finished difference. Result has 386 places, 738 transitions, 18232 flow [2023-08-24 00:25:40,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=16827, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=18232, PETRI_PLACES=386, PETRI_TRANSITIONS=738} [2023-08-24 00:25:40,009 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 365 predicate places. [2023-08-24 00:25:40,009 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 738 transitions, 18232 flow [2023-08-24 00:25:40,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 104.04) internal successors, (2601), 25 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:40,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:25:40,010 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:25:40,016 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 00:25:40,210 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,SelfDestructingSolverStorable58 [2023-08-24 00:25:40,211 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:25:40,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:25:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash 907067533, now seen corresponding path program 18 times [2023-08-24 00:25:40,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:25:40,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713208964] [2023-08-24 00:25:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:25:40,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:25:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:25:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:25:40,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:25:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713208964] [2023-08-24 00:25:40,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713208964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:25:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851769296] [2023-08-24 00:25:40,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 00:25:40,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:25:40,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:25:40,716 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 00:25:40,717 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 00:25:41,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 00:25:41,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:25:41,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 00:25:41,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:25:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:25:41,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:25:41,350 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:25:41,350 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 42 treesize of output 60 [2023-08-24 00:25:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:25:41,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851769296] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:25:41,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:25:41,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 23 [2023-08-24 00:25:41,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836192023] [2023-08-24 00:25:41,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:25:41,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 00:25:41,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:25:41,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 00:25:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-08-24 00:25:41,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 338 [2023-08-24 00:25:41,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 738 transitions, 18232 flow. Second operand has 24 states, 24 states have (on average 104.04166666666667) internal successors, (2497), 24 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:41,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:25:41,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 338 [2023-08-24 00:25:41,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:25:44,707 INFO L124 PetriNetUnfolderBase]: 3811/7301 cut-off events. [2023-08-24 00:25:44,707 INFO L125 PetriNetUnfolderBase]: For 448594/448594 co-relation queries the response was YES. [2023-08-24 00:25:44,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88343 conditions, 7301 events. 3811/7301 cut-off events. For 448594/448594 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 55351 event pairs, 691 based on Foata normal form. 24/7325 useless extension candidates. Maximal degree in co-relation 88201. Up to 4684 conditions per place. [2023-08-24 00:25:44,807 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 423 selfloop transitions, 358 changer transitions 14/795 dead transitions. [2023-08-24 00:25:44,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 795 transitions, 20804 flow [2023-08-24 00:25:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 00:25:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 00:25:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2374 transitions. [2023-08-24 00:25:44,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31925766541151157 [2023-08-24 00:25:44,809 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2374 transitions. [2023-08-24 00:25:44,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2374 transitions. [2023-08-24 00:25:44,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:25:44,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2374 transitions. [2023-08-24 00:25:44,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 107.9090909090909) internal successors, (2374), 22 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:44,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 338.0) internal successors, (7774), 23 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:44,814 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 338.0) internal successors, (7774), 23 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:44,814 INFO L175 Difference]: Start difference. First operand has 386 places, 738 transitions, 18232 flow. Second operand 22 states and 2374 transitions. [2023-08-24 00:25:44,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 795 transitions, 20804 flow [2023-08-24 00:25:46,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 795 transitions, 20252 flow, removed 45 selfloop flow, removed 15 redundant places. [2023-08-24 00:25:46,513 INFO L231 Difference]: Finished difference. Result has 392 places, 736 transitions, 18380 flow [2023-08-24 00:25:46,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=17680, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=18380, PETRI_PLACES=392, PETRI_TRANSITIONS=736} [2023-08-24 00:25:46,514 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 371 predicate places. [2023-08-24 00:25:46,514 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 736 transitions, 18380 flow [2023-08-24 00:25:46,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 104.04166666666667) internal successors, (2497), 24 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:46,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:25:46,515 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:25:46,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-08-24 00:25:46,717 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,SelfDestructingSolverStorable59 [2023-08-24 00:25:46,717 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:25:46,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:25:46,717 INFO L85 PathProgramCache]: Analyzing trace with hash 734554896, now seen corresponding path program 27 times [2023-08-24 00:25:46,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:25:46,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66239329] [2023-08-24 00:25:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:25:46,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:25:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:25:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:25:47,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:25:47,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66239329] [2023-08-24 00:25:47,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66239329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:25:47,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105931101] [2023-08-24 00:25:47,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 00:25:47,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:25:47,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:25:47,421 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 00:25:47,429 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 00:25:47,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 00:25:47,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:25:47,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-24 00:25:47,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:25:48,271 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 00:25:48,275 INFO L322 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-08-24 00:25:48,275 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 28 treesize of output 1 [2023-08-24 00:25:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 00:25:48,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:25:48,864 INFO L322 Elim1Store]: treesize reduction 26, result has 86.7 percent of original size [2023-08-24 00:25:48,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 198 [2023-08-24 00:25:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 00:25:49,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105931101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:25:49,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:25:49,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2023-08-24 00:25:49,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961985682] [2023-08-24 00:25:49,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:25:49,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-24 00:25:49,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:25:49,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-24 00:25:49,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1783, Unknown=0, NotChecked=0, Total=2070 [2023-08-24 00:25:49,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:25:49,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 736 transitions, 18380 flow. Second operand has 46 states, 46 states have (on average 89.6086956521739) internal successors, (4122), 46 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:25:49,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:25:49,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:25:49,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:26:01,189 INFO L124 PetriNetUnfolderBase]: 5411/10227 cut-off events. [2023-08-24 00:26:01,190 INFO L125 PetriNetUnfolderBase]: For 715958/715958 co-relation queries the response was YES. [2023-08-24 00:26:01,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126541 conditions, 10227 events. 5411/10227 cut-off events. For 715958/715958 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 81662 event pairs, 271 based on Foata normal form. 166/10393 useless extension candidates. Maximal degree in co-relation 126398. Up to 4772 conditions per place. [2023-08-24 00:26:01,345 INFO L140 encePairwiseOnDemand]: 325/338 looper letters, 557 selfloop transitions, 947 changer transitions 30/1534 dead transitions. [2023-08-24 00:26:01,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 1534 transitions, 37017 flow [2023-08-24 00:26:01,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-08-24 00:26:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2023-08-24 00:26:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 9257 transitions. [2023-08-24 00:26:01,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27664216125754587 [2023-08-24 00:26:01,352 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 9257 transitions. [2023-08-24 00:26:01,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 9257 transitions. [2023-08-24 00:26:01,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:26:01,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 9257 transitions. [2023-08-24 00:26:01,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 93.5050505050505) internal successors, (9257), 99 states have internal predecessors, (9257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:01,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 338.0) internal successors, (33800), 100 states have internal predecessors, (33800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:01,377 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 338.0) internal successors, (33800), 100 states have internal predecessors, (33800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:01,377 INFO L175 Difference]: Start difference. First operand has 392 places, 736 transitions, 18380 flow. Second operand 99 states and 9257 transitions. [2023-08-24 00:26:01,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 1534 transitions, 37017 flow [2023-08-24 00:26:04,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1534 transitions, 35713 flow, removed 0 selfloop flow, removed 19 redundant places. [2023-08-24 00:26:04,051 INFO L231 Difference]: Finished difference. Result has 504 places, 1223 transitions, 32845 flow [2023-08-24 00:26:04,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=17562, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=32845, PETRI_PLACES=504, PETRI_TRANSITIONS=1223} [2023-08-24 00:26:04,052 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 483 predicate places. [2023-08-24 00:26:04,052 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 1223 transitions, 32845 flow [2023-08-24 00:26:04,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 89.6086956521739) internal successors, (4122), 46 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:04,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:26:04,053 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:26:04,059 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 00:26:04,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:26:04,253 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:26:04,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:26:04,254 INFO L85 PathProgramCache]: Analyzing trace with hash 599003498, now seen corresponding path program 28 times [2023-08-24 00:26:04,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:26:04,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364842065] [2023-08-24 00:26:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:26:04,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:26:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:26:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:26:04,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:26:04,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364842065] [2023-08-24 00:26:04,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364842065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:26:04,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549493473] [2023-08-24 00:26:04,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 00:26:04,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:26:04,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:26:04,968 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 00:26:04,970 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 00:26:05,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 00:26:05,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:26:05,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 00:26:05,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:26:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:26:05,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:26:07,068 INFO L322 Elim1Store]: treesize reduction 15, result has 93.1 percent of original size [2023-08-24 00:26:07,069 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 232 [2023-08-24 00:26:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:26:19,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549493473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:26:19,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:26:19,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 32 [2023-08-24 00:26:19,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218350594] [2023-08-24 00:26:19,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:26:19,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 00:26:19,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:26:19,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 00:26:19,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 00:26:19,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:26:19,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 1223 transitions, 32845 flow. Second operand has 33 states, 33 states have (on average 89.9090909090909) internal successors, (2967), 33 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:19,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:26:19,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:26:19,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:26:25,938 INFO L124 PetriNetUnfolderBase]: 5228/9646 cut-off events. [2023-08-24 00:26:25,938 INFO L125 PetriNetUnfolderBase]: For 1082137/1082137 co-relation queries the response was YES. [2023-08-24 00:26:26,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141292 conditions, 9646 events. 5228/9646 cut-off events. For 1082137/1082137 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 74444 event pairs, 1019 based on Foata normal form. 58/9704 useless extension candidates. Maximal degree in co-relation 141115. Up to 6676 conditions per place. [2023-08-24 00:26:26,110 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 724 selfloop transitions, 508 changer transitions 23/1255 dead transitions. [2023-08-24 00:26:26,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1255 transitions, 35477 flow [2023-08-24 00:26:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 00:26:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 00:26:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2496 transitions. [2023-08-24 00:26:26,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27350427350427353 [2023-08-24 00:26:26,113 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2496 transitions. [2023-08-24 00:26:26,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2496 transitions. [2023-08-24 00:26:26,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:26:26,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2496 transitions. [2023-08-24 00:26:26,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 92.44444444444444) internal successors, (2496), 27 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:26,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 338.0) internal successors, (9464), 28 states have internal predecessors, (9464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:26,119 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 338.0) internal successors, (9464), 28 states have internal predecessors, (9464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:26,119 INFO L175 Difference]: Start difference. First operand has 504 places, 1223 transitions, 32845 flow. Second operand 27 states and 2496 transitions. [2023-08-24 00:26:26,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1255 transitions, 35477 flow [2023-08-24 00:26:31,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1255 transitions, 32022 flow, removed 1527 selfloop flow, removed 25 redundant places. [2023-08-24 00:26:31,068 INFO L231 Difference]: Finished difference. Result has 507 places, 1186 transitions, 29450 flow [2023-08-24 00:26:31,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=28386, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29450, PETRI_PLACES=507, PETRI_TRANSITIONS=1186} [2023-08-24 00:26:31,069 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 486 predicate places. [2023-08-24 00:26:31,069 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 1186 transitions, 29450 flow [2023-08-24 00:26:31,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.9090909090909) internal successors, (2967), 33 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:31,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:26:31,070 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:26:31,080 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 00:26:31,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:26:31,280 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:26:31,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:26:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1458472674, now seen corresponding path program 29 times [2023-08-24 00:26:31,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:26:31,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250092758] [2023-08-24 00:26:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:26:31,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:26:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:26:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:26:31,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:26:31,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250092758] [2023-08-24 00:26:31,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250092758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:26:31,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296306541] [2023-08-24 00:26:31,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 00:26:31,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:26:31,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:26:31,884 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 00:26:31,887 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 00:26:32,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 00:26:32,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:26:32,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 00:26:32,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:26:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:26:32,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:26:32,747 INFO L322 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-08-24 00:26:32,748 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 183 [2023-08-24 00:26:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:26:33,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296306541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:26:33,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:26:33,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 31 [2023-08-24 00:26:33,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79714051] [2023-08-24 00:26:33,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:26:33,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 00:26:33,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:26:33,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 00:26:33,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-08-24 00:26:33,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:26:33,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 1186 transitions, 29450 flow. Second operand has 32 states, 32 states have (on average 89.96875) internal successors, (2879), 32 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 00:26:33,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:26:33,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:26:33,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:26:40,124 INFO L124 PetriNetUnfolderBase]: 5538/10318 cut-off events. [2023-08-24 00:26:40,124 INFO L125 PetriNetUnfolderBase]: For 1293253/1293253 co-relation queries the response was YES. [2023-08-24 00:26:40,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144009 conditions, 10318 events. 5538/10318 cut-off events. For 1293253/1293253 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 81312 event pairs, 984 based on Foata normal form. 330/10648 useless extension candidates. Maximal degree in co-relation 143832. Up to 6534 conditions per place. [2023-08-24 00:26:40,421 INFO L140 encePairwiseOnDemand]: 327/338 looper letters, 771 selfloop transitions, 686 changer transitions 14/1471 dead transitions. [2023-08-24 00:26:40,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 1471 transitions, 39062 flow [2023-08-24 00:26:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 00:26:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 00:26:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4111 transitions. [2023-08-24 00:26:40,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27642549757934376 [2023-08-24 00:26:40,424 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4111 transitions. [2023-08-24 00:26:40,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4111 transitions. [2023-08-24 00:26:40,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:26:40,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4111 transitions. [2023-08-24 00:26:40,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 93.43181818181819) internal successors, (4111), 44 states have internal predecessors, (4111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:40,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 338.0) internal successors, (15210), 45 states have internal predecessors, (15210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:40,440 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 338.0) internal successors, (15210), 45 states have internal predecessors, (15210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:40,441 INFO L175 Difference]: Start difference. First operand has 507 places, 1186 transitions, 29450 flow. Second operand 44 states and 4111 transitions. [2023-08-24 00:26:40,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 1471 transitions, 39062 flow [2023-08-24 00:26:44,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 1471 transitions, 37408 flow, removed 135 selfloop flow, removed 28 redundant places. [2023-08-24 00:26:44,972 INFO L231 Difference]: Finished difference. Result has 534 places, 1317 transitions, 33609 flow [2023-08-24 00:26:44,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=28115, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=33609, PETRI_PLACES=534, PETRI_TRANSITIONS=1317} [2023-08-24 00:26:44,973 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 513 predicate places. [2023-08-24 00:26:44,973 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 1317 transitions, 33609 flow [2023-08-24 00:26:44,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 89.96875) internal successors, (2879), 32 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 00:26:44,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:26:44,974 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:26:44,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-24 00:26:45,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:26:45,180 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:26:45,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:26:45,180 INFO L85 PathProgramCache]: Analyzing trace with hash 17591245, now seen corresponding path program 19 times [2023-08-24 00:26:45,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:26:45,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074957065] [2023-08-24 00:26:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:26:45,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:26:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:26:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:26:45,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:26:45,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074957065] [2023-08-24 00:26:45,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074957065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:26:45,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11803430] [2023-08-24 00:26:45,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 00:26:45,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:26:45,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:26:45,564 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 00:26:45,565 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 00:26:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:26:45,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 00:26:45,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:26:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:26:45,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:26:46,027 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 00:26:46,027 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 40 treesize of output 56 [2023-08-24 00:26:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:26:46,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11803430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:26:46,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:26:46,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 6] total 25 [2023-08-24 00:26:46,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140316238] [2023-08-24 00:26:46,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:26:46,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 00:26:46,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:26:46,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 00:26:46,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2023-08-24 00:26:46,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 338 [2023-08-24 00:26:46,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 1317 transitions, 33609 flow. Second operand has 26 states, 26 states have (on average 104.34615384615384) internal successors, (2713), 26 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:46,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:26:46,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 338 [2023-08-24 00:26:46,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:26:52,598 INFO L124 PetriNetUnfolderBase]: 5753/10687 cut-off events. [2023-08-24 00:26:52,599 INFO L125 PetriNetUnfolderBase]: For 1811855/1811855 co-relation queries the response was YES. [2023-08-24 00:26:52,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167620 conditions, 10687 events. 5753/10687 cut-off events. For 1811855/1811855 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 84519 event pairs, 789 based on Foata normal form. 24/10711 useless extension candidates. Maximal degree in co-relation 167430. Up to 6458 conditions per place. [2023-08-24 00:26:52,827 INFO L140 encePairwiseOnDemand]: 330/338 looper letters, 850 selfloop transitions, 616 changer transitions 8/1474 dead transitions. [2023-08-24 00:26:52,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1474 transitions, 40928 flow [2023-08-24 00:26:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 00:26:52,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 00:26:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2402 transitions. [2023-08-24 00:26:52,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3230231307154384 [2023-08-24 00:26:52,830 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2402 transitions. [2023-08-24 00:26:52,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2402 transitions. [2023-08-24 00:26:52,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:26:52,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2402 transitions. [2023-08-24 00:26:52,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 109.18181818181819) internal successors, (2402), 22 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:52,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 338.0) internal successors, (7774), 23 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:52,836 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 338.0) internal successors, (7774), 23 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:26:52,836 INFO L175 Difference]: Start difference. First operand has 534 places, 1317 transitions, 33609 flow. Second operand 22 states and 2402 transitions. [2023-08-24 00:26:52,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1474 transitions, 40928 flow [2023-08-24 00:27:00,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1474 transitions, 39467 flow, removed 354 selfloop flow, removed 22 redundant places. [2023-08-24 00:27:00,281 INFO L231 Difference]: Finished difference. Result has 535 places, 1355 transitions, 34778 flow [2023-08-24 00:27:00,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=32250, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=34778, PETRI_PLACES=535, PETRI_TRANSITIONS=1355} [2023-08-24 00:27:00,283 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 514 predicate places. [2023-08-24 00:27:00,283 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1355 transitions, 34778 flow [2023-08-24 00:27:00,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.34615384615384) internal successors, (2713), 26 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:27:00,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:27:00,283 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:27:00,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-08-24 00:27:00,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:27:00,485 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:27:00,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:27:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash 893733548, now seen corresponding path program 30 times [2023-08-24 00:27:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:27:00,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555861369] [2023-08-24 00:27:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:27:00,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:27:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:27:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:27:01,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:27:01,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555861369] [2023-08-24 00:27:01,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555861369] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:27:01,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204089624] [2023-08-24 00:27:01,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 00:27:01,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:27:01,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:27:01,069 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 00:27:01,071 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 00:27:01,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-24 00:27:01,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:27:01,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 00:27:01,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:27:01,904 INFO L322 Elim1Store]: treesize reduction 48, result has 15.8 percent of original size [2023-08-24 00:27:01,905 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 28 treesize of output 16 [2023-08-24 00:27:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:27:01,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:27:02,220 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 00:27:02,220 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 47 treesize of output 80 [2023-08-24 00:27:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:27:02,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204089624] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:27:02,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:27:02,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2023-08-24 00:27:02,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155686474] [2023-08-24 00:27:02,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:27:02,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-24 00:27:02,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:27:02,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-24 00:27:02,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2023-08-24 00:27:02,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:27:02,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1355 transitions, 34778 flow. Second operand has 46 states, 46 states have (on average 89.6086956521739) internal successors, (4122), 46 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:27:02,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:27:02,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:27:02,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:27:26,517 INFO L124 PetriNetUnfolderBase]: 15702/29067 cut-off events. [2023-08-24 00:27:26,517 INFO L125 PetriNetUnfolderBase]: For 5581579/5581579 co-relation queries the response was YES. [2023-08-24 00:27:27,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478141 conditions, 29067 events. 15702/29067 cut-off events. For 5581579/5581579 co-relation queries the response was YES. Maximal size of possible extension queue 1584. Compared 265505 event pairs, 1063 based on Foata normal form. 226/29293 useless extension candidates. Maximal degree in co-relation 477948. Up to 8410 conditions per place. [2023-08-24 00:27:27,839 INFO L140 encePairwiseOnDemand]: 326/338 looper letters, 1371 selfloop transitions, 2698 changer transitions 38/4107 dead transitions. [2023-08-24 00:27:27,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 4107 transitions, 115232 flow [2023-08-24 00:27:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-24 00:27:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-24 00:27:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 6783 transitions. [2023-08-24 00:27:27,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27872287968441817 [2023-08-24 00:27:27,845 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 6783 transitions. [2023-08-24 00:27:27,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 6783 transitions. [2023-08-24 00:27:27,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:27:27,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 6783 transitions. [2023-08-24 00:27:27,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 94.20833333333333) internal successors, (6783), 72 states have internal predecessors, (6783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:27:27,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 338.0) internal successors, (24674), 73 states have internal predecessors, (24674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:27:27,872 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 338.0) internal successors, (24674), 73 states have internal predecessors, (24674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:27:27,872 INFO L175 Difference]: Start difference. First operand has 535 places, 1355 transitions, 34778 flow. Second operand 72 states and 6783 transitions. [2023-08-24 00:27:27,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 4107 transitions, 115232 flow [2023-08-24 00:27:57,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 4107 transitions, 111806 flow, removed 477 selfloop flow, removed 13 redundant places. [2023-08-24 00:27:57,649 INFO L231 Difference]: Finished difference. Result has 631 places, 3571 transitions, 105876 flow [2023-08-24 00:27:57,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=33518, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=817, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=105876, PETRI_PLACES=631, PETRI_TRANSITIONS=3571} [2023-08-24 00:27:57,650 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 610 predicate places. [2023-08-24 00:27:57,651 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 3571 transitions, 105876 flow [2023-08-24 00:27:57,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 89.6086956521739) internal successors, (4122), 46 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:27:57,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:27:57,651 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:27:57,657 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 00:27:57,852 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,SelfDestructingSolverStorable64 [2023-08-24 00:27:57,852 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:27:57,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:27:57,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1363487775, now seen corresponding path program 20 times [2023-08-24 00:27:57,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:27:57,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191904703] [2023-08-24 00:27:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:27:57,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:27:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:27:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:27:58,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:27:58,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191904703] [2023-08-24 00:27:58,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191904703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:27:58,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241926992] [2023-08-24 00:27:58,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:27:58,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:27:58,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:27:58,197 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 00:27:58,199 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 00:27:58,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:27:58,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:27:58,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 00:27:58,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:27:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:27:58,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:27:58,671 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 00:27:58,671 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 40 treesize of output 56 [2023-08-24 00:27:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-24 00:27:58,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241926992] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:27:58,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:27:58,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 6] total 25 [2023-08-24 00:27:58,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068484170] [2023-08-24 00:27:58,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:27:58,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 00:27:58,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:27:58,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 00:27:58,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-08-24 00:27:58,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 338 [2023-08-24 00:27:58,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 3571 transitions, 105876 flow. Second operand has 26 states, 26 states have (on average 104.34615384615384) internal successors, (2713), 26 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:27:58,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:27:58,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 338 [2023-08-24 00:27:58,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:28:38,504 INFO L124 PetriNetUnfolderBase]: 15935/29478 cut-off events. [2023-08-24 00:28:38,504 INFO L125 PetriNetUnfolderBase]: For 7538122/7538122 co-relation queries the response was YES. [2023-08-24 00:28:40,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549189 conditions, 29478 events. 15935/29478 cut-off events. For 7538122/7538122 co-relation queries the response was YES. Maximal size of possible extension queue 1613. Compared 268771 event pairs, 2841 based on Foata normal form. 100/29578 useless extension candidates. Maximal degree in co-relation 548959. Up to 24303 conditions per place. [2023-08-24 00:28:40,192 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 2854 selfloop transitions, 986 changer transitions 7/3847 dead transitions. [2023-08-24 00:28:40,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 3847 transitions, 124939 flow [2023-08-24 00:28:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 00:28:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 00:28:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2915 transitions. [2023-08-24 00:28:40,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31941705018628097 [2023-08-24 00:28:40,200 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2915 transitions. [2023-08-24 00:28:40,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2915 transitions. [2023-08-24 00:28:40,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:28:40,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2915 transitions. [2023-08-24 00:28:40,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 107.96296296296296) internal successors, (2915), 27 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:28:40,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 338.0) internal successors, (9464), 28 states have internal predecessors, (9464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:28:40,207 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 338.0) internal successors, (9464), 28 states have internal predecessors, (9464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:28:40,207 INFO L175 Difference]: Start difference. First operand has 631 places, 3571 transitions, 105876 flow. Second operand 27 states and 2915 transitions. [2023-08-24 00:28:40,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 3847 transitions, 124939 flow [2023-08-24 00:29:56,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 3847 transitions, 117163 flow, removed 3858 selfloop flow, removed 9 redundant places. [2023-08-24 00:29:56,279 INFO L231 Difference]: Finished difference. Result has 657 places, 3676 transitions, 106675 flow [2023-08-24 00:29:56,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=100696, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=888, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=106675, PETRI_PLACES=657, PETRI_TRANSITIONS=3676} [2023-08-24 00:29:56,281 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 636 predicate places. [2023-08-24 00:29:56,282 INFO L495 AbstractCegarLoop]: Abstraction has has 657 places, 3676 transitions, 106675 flow [2023-08-24 00:29:56,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.34615384615384) internal successors, (2713), 26 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:29:56,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:29:56,282 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:29:56,287 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 00:29:56,482 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,SelfDestructingSolverStorable65 [2023-08-24 00:29:56,483 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:29:56,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:29:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash 621138163, now seen corresponding path program 21 times [2023-08-24 00:29:56,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:29:56,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081437947] [2023-08-24 00:29:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:29:56,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:29:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:29:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:29:56,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:29:56,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081437947] [2023-08-24 00:29:56,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081437947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:29:56,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383827773] [2023-08-24 00:29:56,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 00:29:56,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:29:56,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:29:56,929 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 00:29:56,933 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 00:29:57,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 00:29:57,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:29:57,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 00:29:57,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:29:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:29:57,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:29:57,947 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-24 00:29:57,947 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 42 treesize of output 60 [2023-08-24 00:29:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:29:58,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383827773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:29:58,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:29:58,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2023-08-24 00:29:58,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096203184] [2023-08-24 00:29:58,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:29:58,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 00:29:58,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:29:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 00:29:58,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1705, Unknown=0, NotChecked=0, Total=1980 [2023-08-24 00:29:58,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 338 [2023-08-24 00:29:58,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 657 places, 3676 transitions, 106675 flow. Second operand has 45 states, 45 states have (on average 89.57777777777778) internal successors, (4031), 45 states have internal predecessors, (4031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:29:58,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:29:58,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 338 [2023-08-24 00:29:58,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:31:03,424 INFO L124 PetriNetUnfolderBase]: 23078/43194 cut-off events. [2023-08-24 00:31:03,425 INFO L125 PetriNetUnfolderBase]: For 11737858/11737858 co-relation queries the response was YES. [2023-08-24 00:31:05,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803726 conditions, 43194 events. 23078/43194 cut-off events. For 11737858/11737858 co-relation queries the response was YES. Maximal size of possible extension queue 2419. Compared 423547 event pairs, 2563 based on Foata normal form. 249/43443 useless extension candidates. Maximal degree in co-relation 803485. Up to 13273 conditions per place. [2023-08-24 00:31:06,152 INFO L140 encePairwiseOnDemand]: 326/338 looper letters, 1859 selfloop transitions, 3925 changer transitions 39/5823 dead transitions. [2023-08-24 00:31:06,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 5823 transitions, 180368 flow [2023-08-24 00:31:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-24 00:31:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-24 00:31:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6375 transitions. [2023-08-24 00:31:06,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27736686390532544 [2023-08-24 00:31:06,159 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6375 transitions. [2023-08-24 00:31:06,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6375 transitions. [2023-08-24 00:31:06,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:31:06,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6375 transitions. [2023-08-24 00:31:06,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 93.75) internal successors, (6375), 68 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:31:06,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 338.0) internal successors, (23322), 69 states have internal predecessors, (23322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:31:06,176 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 338.0) internal successors, (23322), 69 states have internal predecessors, (23322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:31:06,176 INFO L175 Difference]: Start difference. First operand has 657 places, 3676 transitions, 106675 flow. Second operand 68 states and 6375 transitions. [2023-08-24 00:31:06,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 5823 transitions, 180368 flow [2023-08-24 00:32:39,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 5823 transitions, 176779 flow, removed 998 selfloop flow, removed 12 redundant places. [2023-08-24 00:32:40,095 INFO L231 Difference]: Finished difference. Result has 739 places, 5192 transitions, 166219 flow [2023-08-24 00:32:40,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=104616, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=849, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=166219, PETRI_PLACES=739, PETRI_TRANSITIONS=5192} [2023-08-24 00:32:40,099 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 718 predicate places. [2023-08-24 00:32:40,099 INFO L495 AbstractCegarLoop]: Abstraction has has 739 places, 5192 transitions, 166219 flow [2023-08-24 00:32:40,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 89.57777777777778) internal successors, (4031), 45 states have internal predecessors, (4031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:32:40,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:32:40,100 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:32:40,106 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 00:32:40,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:32:40,306 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:32:40,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:32:40,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1815743777, now seen corresponding path program 22 times [2023-08-24 00:32:40,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:32:40,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038458091] [2023-08-24 00:32:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:32:40,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:32:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:32:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 00:32:40,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:32:40,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038458091] [2023-08-24 00:32:40,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038458091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:32:40,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428692449] [2023-08-24 00:32:40,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 00:32:40,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:32:40,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:32:40,726 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 00:32:40,728 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 00:32:40,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 00:32:40,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:32:40,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 00:32:40,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:32:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-24 00:32:41,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:32:41,204 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 00:32:41,204 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 40 treesize of output 56 [2023-08-24 00:32:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-24 00:32:41,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428692449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:32:41,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:32:41,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 6] total 26 [2023-08-24 00:32:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86848498] [2023-08-24 00:32:41,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:32:41,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 00:32:41,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:32:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 00:32:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2023-08-24 00:32:41,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 338 [2023-08-24 00:32:41,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 5192 transitions, 166219 flow. Second operand has 27 states, 27 states have (on average 104.25925925925925) internal successors, (2815), 27 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:32:41,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:32:41,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 338 [2023-08-24 00:32:41,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:34:06,836 INFO L124 PetriNetUnfolderBase]: 25709/47861 cut-off events. [2023-08-24 00:34:06,836 INFO L125 PetriNetUnfolderBase]: For 13836783/13836783 co-relation queries the response was YES. [2023-08-24 00:34:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942538 conditions, 47861 events. 25709/47861 cut-off events. For 13836783/13836783 co-relation queries the response was YES. Maximal size of possible extension queue 2707. Compared 474179 event pairs, 5620 based on Foata normal form. 124/47985 useless extension candidates. Maximal degree in co-relation 942270. Up to 41364 conditions per place. [2023-08-24 00:34:09,521 INFO L140 encePairwiseOnDemand]: 328/338 looper letters, 5067 selfloop transitions, 724 changer transitions 7/5798 dead transitions. [2023-08-24 00:34:09,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 5798 transitions, 199392 flow [2023-08-24 00:34:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 00:34:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 00:34:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3235 transitions. [2023-08-24 00:34:09,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31903353057199213 [2023-08-24 00:34:09,524 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3235 transitions. [2023-08-24 00:34:09,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3235 transitions. [2023-08-24 00:34:09,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:34:09,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3235 transitions. [2023-08-24 00:34:09,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 107.83333333333333) internal successors, (3235), 30 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:34:09,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 338.0) internal successors, (10478), 31 states have internal predecessors, (10478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:34:09,530 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 338.0) internal successors, (10478), 31 states have internal predecessors, (10478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:34:09,530 INFO L175 Difference]: Start difference. First operand has 739 places, 5192 transitions, 166219 flow. Second operand 30 states and 3235 transitions. [2023-08-24 00:34:09,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 5798 transitions, 199392 flow Received shutdown request... [2023-08-24 00:34:18,836 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 00:34:18,836 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 00:34:19,049 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 00:34:19,054 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 00:34:19,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:34:19,250 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-24 00:34:19,251 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 00:34:19,251 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 00:34:19,252 INFO L445 BasicCegarLoop]: Path program histogram: [30, 22, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-24 00:34:19,254 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 00:34:19,254 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 00:34:19,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 12:34:19 BasicIcfg [2023-08-24 00:34:19,256 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 00:34:19,257 INFO L158 Benchmark]: Toolchain (without parser) took 777919.00ms. Allocated memory was 373.3MB in the beginning and 11.1GB in the end (delta: 10.7GB). Free memory was 348.8MB in the beginning and 7.9GB in the end (delta: -7.5GB). Peak memory consumption was 6.0GB. Max. memory is 16.0GB. [2023-08-24 00:34:19,257 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 373.3MB. Free memory is still 350.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 00:34:19,257 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.56ms. Allocated memory is still 373.3MB. Free memory was 348.8MB in the beginning and 337.5MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 00:34:19,257 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.96ms. Allocated memory is still 373.3MB. Free memory was 337.5MB in the beginning and 336.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 00:34:19,257 INFO L158 Benchmark]: Boogie Preprocessor took 50.94ms. Allocated memory is still 373.3MB. Free memory was 336.0MB in the beginning and 334.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 00:34:19,257 INFO L158 Benchmark]: RCFGBuilder took 428.79ms. Allocated memory is still 373.3MB. Free memory was 334.4MB in the beginning and 317.6MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-24 00:34:19,257 INFO L158 Benchmark]: TraceAbstraction took 777112.30ms. Allocated memory was 373.3MB in the beginning and 11.1GB in the end (delta: 10.7GB). Free memory was 316.5MB in the beginning and 7.9GB in the end (delta: -7.6GB). Peak memory consumption was 5.9GB. Max. memory is 16.0GB. [2023-08-24 00:34:19,258 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 373.3MB. Free memory is still 350.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 278.56ms. Allocated memory is still 373.3MB. Free memory was 348.8MB in the beginning and 337.5MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 40.96ms. Allocated memory is still 373.3MB. Free memory was 337.5MB in the beginning and 336.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 50.94ms. Allocated memory is still 373.3MB. Free memory was 336.0MB in the beginning and 334.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 428.79ms. Allocated memory is still 373.3MB. Free memory was 334.4MB in the beginning and 317.6MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 777112.30ms. Allocated memory was 373.3MB in the beginning and 11.1GB in the end (delta: 10.7GB). Free memory was 316.5MB in the beginning and 7.9GB in the end (delta: -7.6GB). Peak memory consumption was 5.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.7s, 147 PlacesBefore, 21 PlacesAfterwards, 155 TransitionsBefore, 19 TransitionsAfterwards, 992 CoEnabledTransitionPairs, 7 FixpointIterations, 100 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 24 TrivialYvCompositions, 9 ConcurrentYvCompositions, 10 ChoiceCompositions, 173 TotalNumberOfCompositions, 1284 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1175, independent: 1137, independent conditional: 0, independent unconditional: 1137, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 614, independent: 604, independent conditional: 0, independent unconditional: 604, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1175, independent: 533, independent conditional: 0, independent unconditional: 533, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 614, unknown conditional: 0, unknown unconditional: 614] , Statistics on independence cache: Total cache size (in pairs): 23, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 181 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 777.0s, OverallIterations: 68, TraceHistogramMax: 3, PathProgramHistogramMax: 30, EmptinessCheckTime: 0.0s, AutomataDifference: 621.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.8s, HoareTripleCheckerStatistics: 632 mSolverCounterUnknown, 7058 SdHoareTripleChecker+Valid, 46.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7058 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 42.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1052 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 882 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44164 IncrementalHoareTripleChecker+Invalid, 46730 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 882 mSolverCounterUnsat, 0 mSDtfsCounter, 44164 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3979 GetRequests, 1834 SyntacticMatches, 34 SemanticMatches, 2111 ConstructedPredicates, 12 IntricatePredicates, 4 DeprecatedPredicates, 20673 ImplicationChecksByTransitivity, 105.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166219occurred in iteration=67, InterpolantAutomatonStates: 1187, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 126.7s InterpolantComputationTime, 2837 NumberOfCodeBlocks, 2835 NumberOfCodeBlocksAsserted, 205 NumberOfCheckSat, 4012 ConstructedInterpolants, 154 QuantifiedInterpolants, 51476 SizeOfPredicates, 578 NumberOfNonLiveVariables, 14281 ConjunctsInSsa, 1563 ConjunctsInUnsatCore, 190 InterpolantComputations, 10 PerfectInterpolantSequences, 1165/2382 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown