/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/clever.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 07:57:38,305 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 07:57:38,387 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 07:57:38,395 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 07:57:38,395 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 07:57:38,427 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 07:57:38,428 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 07:57:38,428 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 07:57:38,430 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 07:57:38,433 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 07:57:38,433 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 07:57:38,434 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 07:57:38,434 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 07:57:38,435 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 07:57:38,435 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 07:57:38,435 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 07:57:38,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 07:57:38,436 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 07:57:38,436 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 07:57:38,436 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 07:57:38,436 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 07:57:38,437 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 07:57:38,437 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 07:57:38,438 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 07:57:38,438 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 07:57:38,438 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 07:57:38,438 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 07:57:38,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 07:57:38,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 07:57:38,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 07:57:38,440 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 07:57:38,440 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 07:57:38,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 07:57:38,440 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 07:57:38,440 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 07:57:38,441 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 07:57:38,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 07:57:38,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 07:57:38,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 07:57:38,756 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 07:57:38,759 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 07:57:38,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-24 07:57:39,935 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 07:57:40,172 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 07:57:40,173 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-24 07:57:40,179 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a46d76ff4/98d6a52c54f24a85a97903e2e45abfbf/FLAG6d85df3cb [2023-08-24 07:57:40,189 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a46d76ff4/98d6a52c54f24a85a97903e2e45abfbf [2023-08-24 07:57:40,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 07:57:40,192 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 07:57:40,193 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 07:57:40,193 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 07:57:40,196 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 07:57:40,197 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,197 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42217501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40, skipping insertion in model container [2023-08-24 07:57:40,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,215 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 07:57:40,364 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/clever.wvr.c[2133,2146] [2023-08-24 07:57:40,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 07:57:40,378 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 07:57:40,407 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/clever.wvr.c[2133,2146] [2023-08-24 07:57:40,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 07:57:40,424 INFO L206 MainTranslator]: Completed translation [2023-08-24 07:57:40,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40 WrapperNode [2023-08-24 07:57:40,424 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 07:57:40,425 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 07:57:40,426 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 07:57:40,426 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 07:57:40,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,445 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,470 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 85 [2023-08-24 07:57:40,471 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 07:57:40,471 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 07:57:40,472 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 07:57:40,472 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 07:57:40,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,484 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,485 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,499 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,502 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,503 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,504 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,505 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 07:57:40,506 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 07:57:40,506 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 07:57:40,506 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 07:57:40,507 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (1/1) ... [2023-08-24 07:57:40,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 07:57:40,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:57:40,540 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 07:57:40,548 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 07:57:40,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 07:57:40,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 07:57:40,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 07:57:40,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 07:57:40,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 07:57:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 07:57:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 07:57:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 07:57:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 07:57:40,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 07:57:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 07:57:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 07:57:40,577 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 07:57:40,681 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 07:57:40,683 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 07:57:40,882 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 07:57:40,889 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 07:57:40,890 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 07:57:40,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 07:57:40 BoogieIcfgContainer [2023-08-24 07:57:40,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 07:57:40,893 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 07:57:40,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 07:57:40,897 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 07:57:40,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 07:57:40" (1/3) ... [2023-08-24 07:57:40,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d47dfaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 07:57:40, skipping insertion in model container [2023-08-24 07:57:40,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:57:40" (2/3) ... [2023-08-24 07:57:40,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d47dfaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 07:57:40, skipping insertion in model container [2023-08-24 07:57:40,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 07:57:40" (3/3) ... [2023-08-24 07:57:40,900 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-08-24 07:57:40,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 07:57:40,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 07:57:40,916 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 07:57:41,004 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 07:57:41,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 254 flow [2023-08-24 07:57:41,134 INFO L124 PetriNetUnfolderBase]: 9/117 cut-off events. [2023-08-24 07:57:41,135 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 07:57:41,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-08-24 07:57:41,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 254 flow [2023-08-24 07:57:41,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2023-08-24 07:57:41,151 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 07:57:41,170 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 109 transitions, 230 flow [2023-08-24 07:57:41,174 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 109 transitions, 230 flow [2023-08-24 07:57:41,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 109 transitions, 230 flow [2023-08-24 07:57:41,244 INFO L124 PetriNetUnfolderBase]: 9/109 cut-off events. [2023-08-24 07:57:41,244 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 07:57:41,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 109 events. 9/109 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-08-24 07:57:41,247 INFO L119 LiptonReduction]: Number of co-enabled transitions 756 [2023-08-24 07:57:44,645 INFO L134 LiptonReduction]: Checked pairs total: 744 [2023-08-24 07:57:44,645 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-08-24 07:57:44,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 07:57:44,673 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;@73359be5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 07:57:44,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 07:57:44,677 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 07:57:44,677 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-08-24 07:57:44,677 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 07:57:44,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:57:44,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:57:44,678 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 07:57:44,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:57:44,682 INFO L85 PathProgramCache]: Analyzing trace with hash -259219510, now seen corresponding path program 1 times [2023-08-24 07:57:44,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:57:44,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525629554] [2023-08-24 07:57:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:44,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:57:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:45,185 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 07:57:45,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:57:45,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525629554] [2023-08-24 07:57:45,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525629554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 07:57:45,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 07:57:45,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 07:57:45,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553874161] [2023-08-24 07:57:45,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 07:57:45,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 07:57:45,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:57:45,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 07:57:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 07:57:45,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 224 [2023-08-24 07:57:45,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:57:45,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 224 [2023-08-24 07:57:45,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:57:45,294 INFO L124 PetriNetUnfolderBase]: 69/117 cut-off events. [2023-08-24 07:57:45,295 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-24 07:57:45,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 117 events. 69/117 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 280 event pairs, 15 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2023-08-24 07:57:45,297 INFO L140 encePairwiseOnDemand]: 220/224 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-08-24 07:57:45,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 27 transitions, 129 flow [2023-08-24 07:57:45,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 07:57:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 07:57:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2023-08-24 07:57:45,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4836309523809524 [2023-08-24 07:57:45,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2023-08-24 07:57:45,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2023-08-24 07:57:45,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:57:45,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2023-08-24 07:57:45,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,337 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 325 transitions. [2023-08-24 07:57:45,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 27 transitions, 129 flow [2023-08-24 07:57:45,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 07:57:45,341 INFO L231 Difference]: Finished difference. Result has 18 places, 17 transitions, 53 flow [2023-08-24 07:57:45,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2023-08-24 07:57:45,346 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-08-24 07:57:45,346 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 53 flow [2023-08-24 07:57:45,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:57:45,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:57:45,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 07:57:45,347 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 07:57:45,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:57:45,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1272176076, now seen corresponding path program 1 times [2023-08-24 07:57:45,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:57:45,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190463693] [2023-08-24 07:57:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:45,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:57:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:45,485 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 07:57:45,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:57:45,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190463693] [2023-08-24 07:57:45,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190463693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 07:57:45,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 07:57:45,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 07:57:45,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041564535] [2023-08-24 07:57:45,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 07:57:45,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 07:57:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:57:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 07:57:45,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 07:57:45,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:57:45,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:57:45,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:57:45,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:57:45,604 INFO L124 PetriNetUnfolderBase]: 121/217 cut-off events. [2023-08-24 07:57:45,604 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-08-24 07:57:45,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 217 events. 121/217 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 688 event pairs, 18 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 201. Up to 130 conditions per place. [2023-08-24 07:57:45,608 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 35 selfloop transitions, 6 changer transitions 8/49 dead transitions. [2023-08-24 07:57:45,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 49 transitions, 243 flow [2023-08-24 07:57:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 07:57:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 07:57:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 510 transitions. [2023-08-24 07:57:45,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2023-08-24 07:57:45,611 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 510 transitions. [2023-08-24 07:57:45,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 510 transitions. [2023-08-24 07:57:45,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:57:45,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 510 transitions. [2023-08-24 07:57:45,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,619 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,619 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 53 flow. Second operand 5 states and 510 transitions. [2023-08-24 07:57:45,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 49 transitions, 243 flow [2023-08-24 07:57:45,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 49 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 07:57:45,621 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 99 flow [2023-08-24 07:57:45,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-08-24 07:57:45,622 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-08-24 07:57:45,622 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 99 flow [2023-08-24 07:57:45,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:57:45,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:57:45,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 07:57:45,624 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 07:57:45,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:57:45,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1400720826, now seen corresponding path program 2 times [2023-08-24 07:57:45,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:57:45,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027785506] [2023-08-24 07:57:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:57:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:45,696 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 07:57:45,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:57:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027785506] [2023-08-24 07:57:45,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027785506] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 07:57:45,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 07:57:45,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 07:57:45,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218994264] [2023-08-24 07:57:45,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 07:57:45,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 07:57:45,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:57:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 07:57:45,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 07:57:45,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:57:45,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:57:45,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:57:45,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:57:45,772 INFO L124 PetriNetUnfolderBase]: 110/185 cut-off events. [2023-08-24 07:57:45,772 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-08-24 07:57:45,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 185 events. 110/185 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 513 event pairs, 14 based on Foata normal form. 8/193 useless extension candidates. Maximal degree in co-relation 190. Up to 128 conditions per place. [2023-08-24 07:57:45,774 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 29 selfloop transitions, 7 changer transitions 5/41 dead transitions. [2023-08-24 07:57:45,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 41 transitions, 247 flow [2023-08-24 07:57:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 07:57:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 07:57:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 504 transitions. [2023-08-24 07:57:45,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-08-24 07:57:45,776 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 504 transitions. [2023-08-24 07:57:45,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 504 transitions. [2023-08-24 07:57:45,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:57:45,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 504 transitions. [2023-08-24 07:57:45,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,781 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,781 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 99 flow. Second operand 5 states and 504 transitions. [2023-08-24 07:57:45,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 41 transitions, 247 flow [2023-08-24 07:57:45,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 07:57:45,783 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 127 flow [2023-08-24 07:57:45,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-24 07:57:45,784 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2023-08-24 07:57:45,784 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 127 flow [2023-08-24 07:57:45,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:45,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:57:45,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:57:45,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 07:57:45,785 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 07:57:45,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:57:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1139161799, now seen corresponding path program 1 times [2023-08-24 07:57:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:57:45,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649256857] [2023-08-24 07:57:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:57:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:57:45,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:57:45,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649256857] [2023-08-24 07:57:45,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649256857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:57:45,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038537000] [2023-08-24 07:57:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:45,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:45,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:57:45,869 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 07:57:45,895 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 07:57:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:45,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 07:57:45,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:57:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:57:46,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:57:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:57:46,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038537000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:57:46,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:57:46,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-08-24 07:57:46,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364882260] [2023-08-24 07:57:46,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:57:46,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 07:57:46,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:57:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 07:57:46,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-24 07:57:46,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:57:46,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 127 flow. Second operand has 7 states, 7 states have (on average 96.85714285714286) internal successors, (678), 7 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:46,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:57:46,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:57:46,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:57:46,186 INFO L124 PetriNetUnfolderBase]: 108/175 cut-off events. [2023-08-24 07:57:46,186 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2023-08-24 07:57:46,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 175 events. 108/175 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 466 event pairs, 0 based on Foata normal form. 16/191 useless extension candidates. Maximal degree in co-relation 289. Up to 91 conditions per place. [2023-08-24 07:57:46,189 INFO L140 encePairwiseOnDemand]: 219/224 looper letters, 31 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-08-24 07:57:46,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 264 flow [2023-08-24 07:57:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 07:57:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 07:57:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 500 transitions. [2023-08-24 07:57:46,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2023-08-24 07:57:46,191 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 500 transitions. [2023-08-24 07:57:46,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 500 transitions. [2023-08-24 07:57:46,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:57:46,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 500 transitions. [2023-08-24 07:57:46,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:46,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:46,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:46,196 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 127 flow. Second operand 5 states and 500 transitions. [2023-08-24 07:57:46,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 264 flow [2023-08-24 07:57:46,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 252 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-24 07:57:46,199 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 144 flow [2023-08-24 07:57:46,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-08-24 07:57:46,200 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 10 predicate places. [2023-08-24 07:57:46,200 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 144 flow [2023-08-24 07:57:46,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.85714285714286) internal successors, (678), 7 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:46,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:57:46,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:57:46,210 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 07:57:46,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:46,407 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 07:57:46,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:57:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1197066339, now seen corresponding path program 1 times [2023-08-24 07:57:46,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:57:46,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033729025] [2023-08-24 07:57:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:46,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:57:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:46,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:57:46,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033729025] [2023-08-24 07:57:46,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033729025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:57:46,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469906436] [2023-08-24 07:57:46,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:46,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:46,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:57:46,739 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 07:57:46,771 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 07:57:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:46,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 07:57:46,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:57:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:47,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:57:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:47,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469906436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:57:47,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:57:47,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-24 07:57:47,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407047034] [2023-08-24 07:57:47,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:57:47,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 07:57:47,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:57:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 07:57:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-24 07:57:47,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 07:57:47,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 144 flow. Second operand has 13 states, 13 states have (on average 86.0) internal successors, (1118), 13 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:47,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:57:47,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 07:57:47,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:57:47,684 INFO L124 PetriNetUnfolderBase]: 260/427 cut-off events. [2023-08-24 07:57:47,684 INFO L125 PetriNetUnfolderBase]: For 528/528 co-relation queries the response was YES. [2023-08-24 07:57:47,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 427 events. 260/427 cut-off events. For 528/528 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1514 event pairs, 18 based on Foata normal form. 10/437 useless extension candidates. Maximal degree in co-relation 598. Up to 221 conditions per place. [2023-08-24 07:57:47,688 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 55 selfloop transitions, 20 changer transitions 14/89 dead transitions. [2023-08-24 07:57:47,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 89 transitions, 618 flow [2023-08-24 07:57:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 07:57:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 07:57:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 915 transitions. [2023-08-24 07:57:47,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40848214285714285 [2023-08-24 07:57:47,692 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 915 transitions. [2023-08-24 07:57:47,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 915 transitions. [2023-08-24 07:57:47,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:57:47,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 915 transitions. [2023-08-24 07:57:47,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.5) internal successors, (915), 10 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:47,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:47,701 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:47,701 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 144 flow. Second operand 10 states and 915 transitions. [2023-08-24 07:57:47,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 89 transitions, 618 flow [2023-08-24 07:57:47,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 89 transitions, 600 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 07:57:47,707 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 307 flow [2023-08-24 07:57:47,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=307, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-24 07:57:47,710 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 23 predicate places. [2023-08-24 07:57:47,712 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 307 flow [2023-08-24 07:57:47,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 86.0) internal successors, (1118), 13 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:47,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:57:47,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:57:47,727 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 07:57:47,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:47,919 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 07:57:47,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:57:47,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1971463267, now seen corresponding path program 2 times [2023-08-24 07:57:47,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:57:47,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255148133] [2023-08-24 07:57:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:47,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:57:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:48,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:57:48,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255148133] [2023-08-24 07:57:48,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255148133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:57:48,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117595264] [2023-08-24 07:57:48,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 07:57:48,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:48,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:57:48,229 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 07:57:48,258 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 07:57:48,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 07:57:48,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:57:48,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 07:57:48,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:57:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:48,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:57:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:48,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117595264] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:57:48,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:57:48,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-24 07:57:48,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866331312] [2023-08-24 07:57:48,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:57:48,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 07:57:48,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:57:48,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 07:57:48,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-08-24 07:57:48,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 07:57:48,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:48,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:57:48,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 07:57:48,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:57:49,329 INFO L124 PetriNetUnfolderBase]: 612/1001 cut-off events. [2023-08-24 07:57:49,330 INFO L125 PetriNetUnfolderBase]: For 2162/2162 co-relation queries the response was YES. [2023-08-24 07:57:49,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4380 conditions, 1001 events. 612/1001 cut-off events. For 2162/2162 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4333 event pairs, 30 based on Foata normal form. 7/1008 useless extension candidates. Maximal degree in co-relation 4336. Up to 537 conditions per place. [2023-08-24 07:57:49,337 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 99 selfloop transitions, 59 changer transitions 7/165 dead transitions. [2023-08-24 07:57:49,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 165 transitions, 1402 flow [2023-08-24 07:57:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 07:57:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 07:57:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1377 transitions. [2023-08-24 07:57:49,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40982142857142856 [2023-08-24 07:57:49,342 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1377 transitions. [2023-08-24 07:57:49,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1377 transitions. [2023-08-24 07:57:49,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:57:49,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1377 transitions. [2023-08-24 07:57:49,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:49,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:49,376 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:49,376 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 307 flow. Second operand 15 states and 1377 transitions. [2023-08-24 07:57:49,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 165 transitions, 1402 flow [2023-08-24 07:57:49,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 165 transitions, 1259 flow, removed 68 selfloop flow, removed 4 redundant places. [2023-08-24 07:57:49,384 INFO L231 Difference]: Finished difference. Result has 60 places, 86 transitions, 847 flow [2023-08-24 07:57:49,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=847, PETRI_PLACES=60, PETRI_TRANSITIONS=86} [2023-08-24 07:57:49,386 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 41 predicate places. [2023-08-24 07:57:49,386 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 86 transitions, 847 flow [2023-08-24 07:57:49,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:49,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:57:49,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:57:49,395 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 07:57:49,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:49,592 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 07:57:49,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:57:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash -237029505, now seen corresponding path program 3 times [2023-08-24 07:57:49,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:57:49,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287866990] [2023-08-24 07:57:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:49,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:57:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:49,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:57:49,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287866990] [2023-08-24 07:57:49,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287866990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:57:49,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121003675] [2023-08-24 07:57:49,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 07:57:49,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:49,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:57:49,925 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 07:57:49,950 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 07:57:50,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 07:57:50,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:57:50,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 07:57:50,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:57:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:50,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:57:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:50,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121003675] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:57:50,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:57:50,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-24 07:57:50,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803221593] [2023-08-24 07:57:50,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:57:50,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 07:57:50,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:57:50,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 07:57:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-24 07:57:50,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 07:57:50,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 86 transitions, 847 flow. Second operand has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:50,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:57:50,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 07:57:50,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:57:50,919 INFO L124 PetriNetUnfolderBase]: 1100/1797 cut-off events. [2023-08-24 07:57:50,919 INFO L125 PetriNetUnfolderBase]: For 7302/7302 co-relation queries the response was YES. [2023-08-24 07:57:50,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9172 conditions, 1797 events. 1100/1797 cut-off events. For 7302/7302 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8789 event pairs, 172 based on Foata normal form. 4/1801 useless extension candidates. Maximal degree in co-relation 7097. Up to 977 conditions per place. [2023-08-24 07:57:50,936 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 106 selfloop transitions, 80 changer transitions 5/191 dead transitions. [2023-08-24 07:57:50,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 191 transitions, 2112 flow [2023-08-24 07:57:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 07:57:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 07:57:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 908 transitions. [2023-08-24 07:57:50,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40535714285714286 [2023-08-24 07:57:50,939 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 908 transitions. [2023-08-24 07:57:50,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 908 transitions. [2023-08-24 07:57:50,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:57:50,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 908 transitions. [2023-08-24 07:57:50,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.8) internal successors, (908), 10 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:50,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:50,946 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:50,947 INFO L175 Difference]: Start difference. First operand has 60 places, 86 transitions, 847 flow. Second operand 10 states and 908 transitions. [2023-08-24 07:57:50,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 191 transitions, 2112 flow [2023-08-24 07:57:50,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 191 transitions, 1928 flow, removed 89 selfloop flow, removed 2 redundant places. [2023-08-24 07:57:50,968 INFO L231 Difference]: Finished difference. Result has 71 places, 132 transitions, 1490 flow [2023-08-24 07:57:50,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1490, PETRI_PLACES=71, PETRI_TRANSITIONS=132} [2023-08-24 07:57:50,969 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 52 predicate places. [2023-08-24 07:57:50,969 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 132 transitions, 1490 flow [2023-08-24 07:57:50,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:50,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:57:50,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:57:50,980 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 07:57:51,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:51,175 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 07:57:51,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:57:51,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1704426119, now seen corresponding path program 1 times [2023-08-24 07:57:51,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:57:51,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924203289] [2023-08-24 07:57:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:57:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:57:51,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:57:51,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924203289] [2023-08-24 07:57:51,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924203289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:57:51,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658727262] [2023-08-24 07:57:51,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:51,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:51,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:57:51,260 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 07:57:51,282 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 07:57:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:51,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 07:57:51,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:57:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:57:51,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:57:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:57:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658727262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:57:51,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:57:51,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-24 07:57:51,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826779267] [2023-08-24 07:57:51,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:57:51,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 07:57:51,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:57:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 07:57:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-24 07:57:51,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:57:51,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 132 transitions, 1490 flow. Second operand has 10 states, 10 states have (on average 95.8) internal successors, (958), 10 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:51,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:57:51,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:57:51,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:57:51,978 INFO L124 PetriNetUnfolderBase]: 2041/3411 cut-off events. [2023-08-24 07:57:51,979 INFO L125 PetriNetUnfolderBase]: For 19991/19991 co-relation queries the response was YES. [2023-08-24 07:57:51,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18724 conditions, 3411 events. 2041/3411 cut-off events. For 19991/19991 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19781 event pairs, 67 based on Foata normal form. 64/3475 useless extension candidates. Maximal degree in co-relation 13927. Up to 1821 conditions per place. [2023-08-24 07:57:52,015 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 324 selfloop transitions, 103 changer transitions 5/432 dead transitions. [2023-08-24 07:57:52,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 432 transitions, 5461 flow [2023-08-24 07:57:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 07:57:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 07:57:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1205 transitions. [2023-08-24 07:57:52,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44828869047619047 [2023-08-24 07:57:52,020 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1205 transitions. [2023-08-24 07:57:52,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1205 transitions. [2023-08-24 07:57:52,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:57:52,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1205 transitions. [2023-08-24 07:57:52,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 100.41666666666667) internal successors, (1205), 12 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:52,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 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 07:57:52,028 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 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 07:57:52,028 INFO L175 Difference]: Start difference. First operand has 71 places, 132 transitions, 1490 flow. Second operand 12 states and 1205 transitions. [2023-08-24 07:57:52,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 432 transitions, 5461 flow [2023-08-24 07:57:52,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 432 transitions, 5298 flow, removed 69 selfloop flow, removed 3 redundant places. [2023-08-24 07:57:52,076 INFO L231 Difference]: Finished difference. Result has 87 places, 217 transitions, 3056 flow [2023-08-24 07:57:52,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3056, PETRI_PLACES=87, PETRI_TRANSITIONS=217} [2023-08-24 07:57:52,078 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 68 predicate places. [2023-08-24 07:57:52,078 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 217 transitions, 3056 flow [2023-08-24 07:57:52,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 95.8) internal successors, (958), 10 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:52,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:57:52,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:57:52,086 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 07:57:52,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:52,284 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 07:57:52,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:57:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1605359529, now seen corresponding path program 2 times [2023-08-24 07:57:52,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:57:52,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29524684] [2023-08-24 07:57:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:52,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:57:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:52,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:57:52,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29524684] [2023-08-24 07:57:52,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29524684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:57:52,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28874005] [2023-08-24 07:57:52,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 07:57:52,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:52,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:57:52,655 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 07:57:52,657 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 07:57:52,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 07:57:52,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:57:52,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 07:57:52,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:57:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:53,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:57:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 07:57:55,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28874005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:57:55,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:57:55,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-08-24 07:57:55,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161977977] [2023-08-24 07:57:55,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:57:55,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 07:57:55,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:57:55,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 07:57:55,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-08-24 07:57:55,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 07:57:55,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 217 transitions, 3056 flow. Second operand has 17 states, 17 states have (on average 85.47058823529412) internal successors, (1453), 17 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 07:57:55,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:57:55,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 07:57:55,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:57:58,770 INFO L124 PetriNetUnfolderBase]: 2497/4190 cut-off events. [2023-08-24 07:57:58,770 INFO L125 PetriNetUnfolderBase]: For 38200/38200 co-relation queries the response was YES. [2023-08-24 07:57:58,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27532 conditions, 4190 events. 2497/4190 cut-off events. For 38200/38200 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25238 event pairs, 196 based on Foata normal form. 12/4202 useless extension candidates. Maximal degree in co-relation 24298. Up to 3160 conditions per place. [2023-08-24 07:57:58,888 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 330 selfloop transitions, 86 changer transitions 25/441 dead transitions. [2023-08-24 07:57:58,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 441 transitions, 6700 flow [2023-08-24 07:57:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 07:57:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 07:57:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1559 transitions. [2023-08-24 07:57:58,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40940126050420167 [2023-08-24 07:57:58,893 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1559 transitions. [2023-08-24 07:57:58,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1559 transitions. [2023-08-24 07:57:58,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:57:58,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1559 transitions. [2023-08-24 07:57:58,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.70588235294117) internal successors, (1559), 17 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:58,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 224.0) internal successors, (4032), 18 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:58,904 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 224.0) internal successors, (4032), 18 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:57:58,904 INFO L175 Difference]: Start difference. First operand has 87 places, 217 transitions, 3056 flow. Second operand 17 states and 1559 transitions. [2023-08-24 07:57:58,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 441 transitions, 6700 flow [2023-08-24 07:57:59,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 441 transitions, 6019 flow, removed 336 selfloop flow, removed 1 redundant places. [2023-08-24 07:57:59,091 INFO L231 Difference]: Finished difference. Result has 109 places, 277 transitions, 4044 flow [2023-08-24 07:57:59,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2735, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4044, PETRI_PLACES=109, PETRI_TRANSITIONS=277} [2023-08-24 07:57:59,092 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 90 predicate places. [2023-08-24 07:57:59,092 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 277 transitions, 4044 flow [2023-08-24 07:57:59,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.47058823529412) internal successors, (1453), 17 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 07:57:59,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:57:59,093 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:57:59,104 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 07:57:59,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:59,301 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 07:57:59,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:57:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash -834738333, now seen corresponding path program 3 times [2023-08-24 07:57:59,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:57:59,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65421747] [2023-08-24 07:57:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:57:59,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:57:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:57:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:57:59,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:57:59,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65421747] [2023-08-24 07:57:59,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65421747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:57:59,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102968589] [2023-08-24 07:57:59,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 07:57:59,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:57:59,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:57:59,581 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 07:57:59,596 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 07:57:59,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 07:57:59,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:57:59,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 07:57:59,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:57:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:57:59,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:58:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 07:58:00,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102968589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:58:00,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:58:00,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 13 [2023-08-24 07:58:00,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84128174] [2023-08-24 07:58:00,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:58:00,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 07:58:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:58:00,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 07:58:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-24 07:58:00,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 224 [2023-08-24 07:58:00,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 277 transitions, 4044 flow. Second operand has 15 states, 15 states have (on average 91.53333333333333) internal successors, (1373), 15 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:00,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:58:00,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 224 [2023-08-24 07:58:00,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:58:02,024 INFO L124 PetriNetUnfolderBase]: 2896/4900 cut-off events. [2023-08-24 07:58:02,024 INFO L125 PetriNetUnfolderBase]: For 54216/54216 co-relation queries the response was YES. [2023-08-24 07:58:02,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32679 conditions, 4900 events. 2896/4900 cut-off events. For 54216/54216 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30934 event pairs, 210 based on Foata normal form. 27/4927 useless extension candidates. Maximal degree in co-relation 32097. Up to 3748 conditions per place. [2023-08-24 07:58:02,076 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 344 selfloop transitions, 135 changer transitions 18/497 dead transitions. [2023-08-24 07:58:02,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 497 transitions, 7814 flow [2023-08-24 07:58:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 07:58:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 07:58:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2042 transitions. [2023-08-24 07:58:02,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340986394557823 [2023-08-24 07:58:02,082 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2042 transitions. [2023-08-24 07:58:02,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2042 transitions. [2023-08-24 07:58:02,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:58:02,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2042 transitions. [2023-08-24 07:58:02,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 97.23809523809524) internal successors, (2042), 21 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:02,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:02,095 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:02,095 INFO L175 Difference]: Start difference. First operand has 109 places, 277 transitions, 4044 flow. Second operand 21 states and 2042 transitions. [2023-08-24 07:58:02,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 497 transitions, 7814 flow [2023-08-24 07:58:02,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 497 transitions, 7220 flow, removed 287 selfloop flow, removed 7 redundant places. [2023-08-24 07:58:02,270 INFO L231 Difference]: Finished difference. Result has 132 places, 369 transitions, 5951 flow [2023-08-24 07:58:02,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5951, PETRI_PLACES=132, PETRI_TRANSITIONS=369} [2023-08-24 07:58:02,271 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 113 predicate places. [2023-08-24 07:58:02,271 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 369 transitions, 5951 flow [2023-08-24 07:58:02,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 91.53333333333333) internal successors, (1373), 15 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:02,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:58:02,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:58:02,278 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 07:58:02,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:02,474 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 07:58:02,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:58:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash -922612837, now seen corresponding path program 4 times [2023-08-24 07:58:02,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:58:02,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77079599] [2023-08-24 07:58:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:58:02,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:58:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:58:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:58:02,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:58:02,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77079599] [2023-08-24 07:58:02,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77079599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:58:02,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825938502] [2023-08-24 07:58:02,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 07:58:02,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:02,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:58:02,557 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 07:58:02,582 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 07:58:02,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 07:58:02,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:58:02,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 07:58:02,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:58:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:58:02,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:58:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:58:02,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825938502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:58:02,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:58:02,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-08-24 07:58:02,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631294248] [2023-08-24 07:58:02,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:58:02,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 07:58:02,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:58:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 07:58:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-24 07:58:02,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:58:02,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 369 transitions, 5951 flow. Second operand has 9 states, 9 states have (on average 96.22222222222223) internal successors, (866), 9 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:02,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:58:02,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:58:02,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:58:03,937 INFO L124 PetriNetUnfolderBase]: 3271/5800 cut-off events. [2023-08-24 07:58:03,937 INFO L125 PetriNetUnfolderBase]: For 71785/71785 co-relation queries the response was YES. [2023-08-24 07:58:03,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39823 conditions, 5800 events. 3271/5800 cut-off events. For 71785/71785 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40295 event pairs, 296 based on Foata normal form. 40/5840 useless extension candidates. Maximal degree in co-relation 37952. Up to 2273 conditions per place. [2023-08-24 07:58:03,999 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 339 selfloop transitions, 316 changer transitions 6/661 dead transitions. [2023-08-24 07:58:03,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 661 transitions, 11513 flow [2023-08-24 07:58:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 07:58:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 07:58:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1395 transitions. [2023-08-24 07:58:04,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448341836734694 [2023-08-24 07:58:04,004 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1395 transitions. [2023-08-24 07:58:04,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1395 transitions. [2023-08-24 07:58:04,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:58:04,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1395 transitions. [2023-08-24 07:58:04,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 99.64285714285714) internal successors, (1395), 14 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:04,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:04,012 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:04,012 INFO L175 Difference]: Start difference. First operand has 132 places, 369 transitions, 5951 flow. Second operand 14 states and 1395 transitions. [2023-08-24 07:58:04,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 661 transitions, 11513 flow [2023-08-24 07:58:04,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 661 transitions, 10434 flow, removed 527 selfloop flow, removed 7 redundant places. [2023-08-24 07:58:04,241 INFO L231 Difference]: Finished difference. Result has 146 places, 467 transitions, 8053 flow [2023-08-24 07:58:04,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5174, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8053, PETRI_PLACES=146, PETRI_TRANSITIONS=467} [2023-08-24 07:58:04,242 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 127 predicate places. [2023-08-24 07:58:04,242 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 467 transitions, 8053 flow [2023-08-24 07:58:04,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 96.22222222222223) internal successors, (866), 9 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:04,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:58:04,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:58:04,248 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 07:58:04,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-24 07:58:04,446 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 07:58:04,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:58:04,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1944370241, now seen corresponding path program 5 times [2023-08-24 07:58:04,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:58:04,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233846164] [2023-08-24 07:58:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:58:04,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:58:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:58:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:58:04,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:58:04,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233846164] [2023-08-24 07:58:04,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233846164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:58:04,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050779130] [2023-08-24 07:58:04,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 07:58:04,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:04,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:58:04,716 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 07:58:04,744 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 07:58:04,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 07:58:04,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:58:04,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 07:58:04,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:58:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:58:05,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:58:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:58:05,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050779130] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:58:05,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:58:05,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-08-24 07:58:05,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807282479] [2023-08-24 07:58:05,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:58:05,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 07:58:05,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:58:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 07:58:05,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-24 07:58:05,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 224 [2023-08-24 07:58:05,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 467 transitions, 8053 flow. Second operand has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:05,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:58:05,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 224 [2023-08-24 07:58:05,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:58:11,376 INFO L124 PetriNetUnfolderBase]: 4345/7642 cut-off events. [2023-08-24 07:58:11,376 INFO L125 PetriNetUnfolderBase]: For 112133/112133 co-relation queries the response was YES. [2023-08-24 07:58:11,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57273 conditions, 7642 events. 4345/7642 cut-off events. For 112133/112133 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55220 event pairs, 238 based on Foata normal form. 19/7661 useless extension candidates. Maximal degree in co-relation 54841. Up to 3059 conditions per place. [2023-08-24 07:58:11,446 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 353 selfloop transitions, 565 changer transitions 21/939 dead transitions. [2023-08-24 07:58:11,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 939 transitions, 17802 flow [2023-08-24 07:58:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 07:58:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 07:58:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3264 transitions. [2023-08-24 07:58:11,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-24 07:58:11,451 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3264 transitions. [2023-08-24 07:58:11,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3264 transitions. [2023-08-24 07:58:11,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:58:11,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3264 transitions. [2023-08-24 07:58:11,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 96.0) internal successors, (3264), 34 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:11,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:11,466 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:11,466 INFO L175 Difference]: Start difference. First operand has 146 places, 467 transitions, 8053 flow. Second operand 34 states and 3264 transitions. [2023-08-24 07:58:11,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 939 transitions, 17802 flow [2023-08-24 07:58:12,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 939 transitions, 16869 flow, removed 454 selfloop flow, removed 3 redundant places. [2023-08-24 07:58:12,068 INFO L231 Difference]: Finished difference. Result has 188 places, 753 transitions, 15432 flow [2023-08-24 07:58:12,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=7632, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15432, PETRI_PLACES=188, PETRI_TRANSITIONS=753} [2023-08-24 07:58:12,069 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 169 predicate places. [2023-08-24 07:58:12,069 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 753 transitions, 15432 flow [2023-08-24 07:58:12,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:12,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:58:12,070 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:58:12,075 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 07:58:12,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:12,275 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 07:58:12,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:58:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash -620121257, now seen corresponding path program 6 times [2023-08-24 07:58:12,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:58:12,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911130818] [2023-08-24 07:58:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:58:12,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:58:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:58:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:58:12,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:58:12,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911130818] [2023-08-24 07:58:12,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911130818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:58:12,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440271794] [2023-08-24 07:58:12,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 07:58:12,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:12,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:58:12,385 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 07:58:12,415 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 07:58:12,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 07:58:12,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:58:12,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 07:58:12,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:58:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:58:12,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:58:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:58:12,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440271794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:58:12,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:58:12,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-24 07:58:12,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158793212] [2023-08-24 07:58:12,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:58:12,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 07:58:12,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:58:12,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 07:58:12,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-24 07:58:12,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:58:12,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 753 transitions, 15432 flow. Second operand has 10 states, 10 states have (on average 95.9) internal successors, (959), 10 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:12,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:58:12,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:58:12,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:58:14,812 INFO L124 PetriNetUnfolderBase]: 5225/9187 cut-off events. [2023-08-24 07:58:14,813 INFO L125 PetriNetUnfolderBase]: For 149556/149556 co-relation queries the response was YES. [2023-08-24 07:58:14,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72583 conditions, 9187 events. 5225/9187 cut-off events. For 149556/149556 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 68369 event pairs, 424 based on Foata normal form. 174/9361 useless extension candidates. Maximal degree in co-relation 70289. Up to 3335 conditions per place. [2023-08-24 07:58:14,899 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 574 selfloop transitions, 625 changer transitions 0/1199 dead transitions. [2023-08-24 07:58:14,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1199 transitions, 25589 flow [2023-08-24 07:58:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 07:58:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 07:58:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1398 transitions. [2023-08-24 07:58:14,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4457908163265306 [2023-08-24 07:58:14,902 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1398 transitions. [2023-08-24 07:58:14,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1398 transitions. [2023-08-24 07:58:14,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:58:14,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1398 transitions. [2023-08-24 07:58:14,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 99.85714285714286) internal successors, (1398), 14 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:14,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:14,907 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:14,908 INFO L175 Difference]: Start difference. First operand has 188 places, 753 transitions, 15432 flow. Second operand 14 states and 1398 transitions. [2023-08-24 07:58:14,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1199 transitions, 25589 flow [2023-08-24 07:58:16,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 1199 transitions, 22613 flow, removed 1469 selfloop flow, removed 7 redundant places. [2023-08-24 07:58:16,023 INFO L231 Difference]: Finished difference. Result has 202 places, 948 transitions, 19816 flow [2023-08-24 07:58:16,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=13331, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19816, PETRI_PLACES=202, PETRI_TRANSITIONS=948} [2023-08-24 07:58:16,024 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 183 predicate places. [2023-08-24 07:58:16,025 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 948 transitions, 19816 flow [2023-08-24 07:58:16,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 95.9) internal successors, (959), 10 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:16,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:58:16,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:58:16,033 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 07:58:16,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 07:58:16,230 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 07:58:16,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:58:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1394518185, now seen corresponding path program 7 times [2023-08-24 07:58:16,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:58:16,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267262004] [2023-08-24 07:58:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:58:16,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:58:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:58:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:58:16,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:58:16,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267262004] [2023-08-24 07:58:16,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267262004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:58:16,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069459237] [2023-08-24 07:58:16,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 07:58:16,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:16,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:58:16,321 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 07:58:16,331 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 07:58:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:58:16,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 07:58:16,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:58:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:58:16,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:58:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:58:16,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069459237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:58:16,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:58:16,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-08-24 07:58:16,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997456859] [2023-08-24 07:58:16,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:58:16,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 07:58:16,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:58:16,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 07:58:16,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-24 07:58:16,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:58:16,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 948 transitions, 19816 flow. Second operand has 9 states, 9 states have (on average 96.33333333333333) internal successors, (867), 9 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:16,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:58:16,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:58:16,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:58:19,182 INFO L124 PetriNetUnfolderBase]: 5565/9746 cut-off events. [2023-08-24 07:58:19,182 INFO L125 PetriNetUnfolderBase]: For 182839/182839 co-relation queries the response was YES. [2023-08-24 07:58:19,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81471 conditions, 9746 events. 5565/9746 cut-off events. For 182839/182839 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 73520 event pairs, 108 based on Foata normal form. 100/9846 useless extension candidates. Maximal degree in co-relation 79428. Up to 3519 conditions per place. [2023-08-24 07:58:19,266 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 977 selfloop transitions, 485 changer transitions 0/1462 dead transitions. [2023-08-24 07:58:19,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1462 transitions, 29781 flow [2023-08-24 07:58:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 07:58:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 07:58:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1491 transitions. [2023-08-24 07:58:19,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2023-08-24 07:58:19,269 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1491 transitions. [2023-08-24 07:58:19,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1491 transitions. [2023-08-24 07:58:19,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:58:19,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1491 transitions. [2023-08-24 07:58:19,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 99.4) internal successors, (1491), 15 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:19,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:19,276 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:19,276 INFO L175 Difference]: Start difference. First operand has 202 places, 948 transitions, 19816 flow. Second operand 15 states and 1491 transitions. [2023-08-24 07:58:19,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1462 transitions, 29781 flow [2023-08-24 07:58:20,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1462 transitions, 29286 flow, removed 197 selfloop flow, removed 4 redundant places. [2023-08-24 07:58:20,646 INFO L231 Difference]: Finished difference. Result has 216 places, 1043 transitions, 22932 flow [2023-08-24 07:58:20,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=19031, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22932, PETRI_PLACES=216, PETRI_TRANSITIONS=1043} [2023-08-24 07:58:20,647 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 197 predicate places. [2023-08-24 07:58:20,648 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 1043 transitions, 22932 flow [2023-08-24 07:58:20,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 96.33333333333333) internal successors, (867), 9 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:20,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:58:20,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:58:20,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-24 07:58:20,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 07:58:20,849 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 07:58:20,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:58:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash -231131307, now seen corresponding path program 8 times [2023-08-24 07:58:20,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:58:20,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180068964] [2023-08-24 07:58:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:58:20,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:58:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:58:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:58:21,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:58:21,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180068964] [2023-08-24 07:58:21,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180068964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:58:21,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075238702] [2023-08-24 07:58:21,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 07:58:21,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:21,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:58:21,105 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 07:58:21,132 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 07:58:21,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 07:58:21,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:58:21,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 07:58:21,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:58:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:58:21,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:58:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:58:21,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075238702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:58:21,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:58:21,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-08-24 07:58:21,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310325160] [2023-08-24 07:58:21,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:58:21,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 07:58:21,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:58:21,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 07:58:21,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-08-24 07:58:21,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 224 [2023-08-24 07:58:21,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1043 transitions, 22932 flow. Second operand has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:21,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:58:21,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 224 [2023-08-24 07:58:21,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:58:28,537 INFO L124 PetriNetUnfolderBase]: 8047/14085 cut-off events. [2023-08-24 07:58:28,537 INFO L125 PetriNetUnfolderBase]: For 326478/326478 co-relation queries the response was YES. [2023-08-24 07:58:28,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128774 conditions, 14085 events. 8047/14085 cut-off events. For 326478/326478 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 111551 event pairs, 521 based on Foata normal form. 40/14125 useless extension candidates. Maximal degree in co-relation 125806. Up to 5312 conditions per place. [2023-08-24 07:58:28,664 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 700 selfloop transitions, 1174 changer transitions 37/1911 dead transitions. [2023-08-24 07:58:28,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1911 transitions, 47117 flow [2023-08-24 07:58:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 07:58:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 07:58:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3841 transitions. [2023-08-24 07:58:28,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42868303571428573 [2023-08-24 07:58:28,669 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3841 transitions. [2023-08-24 07:58:28,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3841 transitions. [2023-08-24 07:58:28,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:58:28,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3841 transitions. [2023-08-24 07:58:28,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 96.025) internal successors, (3841), 40 states have internal predecessors, (3841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:28,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 224.0) internal successors, (9184), 41 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:28,684 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 224.0) internal successors, (9184), 41 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:28,684 INFO L175 Difference]: Start difference. First operand has 216 places, 1043 transitions, 22932 flow. Second operand 40 states and 3841 transitions. [2023-08-24 07:58:28,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1911 transitions, 47117 flow [2023-08-24 07:58:31,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1911 transitions, 45876 flow, removed 616 selfloop flow, removed 1 redundant places. [2023-08-24 07:58:31,462 INFO L231 Difference]: Finished difference. Result has 267 places, 1629 transitions, 42950 flow [2023-08-24 07:58:31,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=22561, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=664, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=42950, PETRI_PLACES=267, PETRI_TRANSITIONS=1629} [2023-08-24 07:58:31,463 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 248 predicate places. [2023-08-24 07:58:31,463 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 1629 transitions, 42950 flow [2023-08-24 07:58:31,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:31,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:58:31,464 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:58:31,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-24 07:58:31,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 07:58:31,669 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 07:58:31,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:58:31,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1040135160, now seen corresponding path program 9 times [2023-08-24 07:58:31,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:58:31,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077171756] [2023-08-24 07:58:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:58:31,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:58:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:58:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 07:58:31,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:58:31,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077171756] [2023-08-24 07:58:31,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077171756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:58:31,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909951722] [2023-08-24 07:58:31,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 07:58:31,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:31,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:58:31,746 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 07:58:31,750 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 07:58:31,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 07:58:31,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:58:31,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 07:58:31,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:58:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 07:58:31,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:58:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 07:58:31,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909951722] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:58:31,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:58:31,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-24 07:58:31,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896823804] [2023-08-24 07:58:31,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:58:31,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 07:58:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:58:31,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 07:58:31,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-24 07:58:31,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:58:31,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 1629 transitions, 42950 flow. Second operand has 10 states, 10 states have (on average 96.4) internal successors, (964), 10 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:31,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:58:31,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:58:31,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:58:38,275 INFO L124 PetriNetUnfolderBase]: 8442/14653 cut-off events. [2023-08-24 07:58:38,275 INFO L125 PetriNetUnfolderBase]: For 399821/399821 co-relation queries the response was YES. [2023-08-24 07:58:38,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143821 conditions, 14653 events. 8442/14653 cut-off events. For 399821/399821 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 115025 event pairs, 788 based on Foata normal form. 634/15287 useless extension candidates. Maximal degree in co-relation 141070. Up to 12266 conditions per place. [2023-08-24 07:58:38,527 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 1635 selfloop transitions, 303 changer transitions 0/1938 dead transitions. [2023-08-24 07:58:38,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1938 transitions, 53143 flow [2023-08-24 07:58:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 07:58:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 07:58:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1311 transitions. [2023-08-24 07:58:38,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45020604395604397 [2023-08-24 07:58:38,529 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1311 transitions. [2023-08-24 07:58:38,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1311 transitions. [2023-08-24 07:58:38,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:58:38,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1311 transitions. [2023-08-24 07:58:38,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 100.84615384615384) internal successors, (1311), 13 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:38,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:38,534 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:38,534 INFO L175 Difference]: Start difference. First operand has 267 places, 1629 transitions, 42950 flow. Second operand 13 states and 1311 transitions. [2023-08-24 07:58:38,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1938 transitions, 53143 flow [2023-08-24 07:58:42,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1938 transitions, 48203 flow, removed 2459 selfloop flow, removed 4 redundant places. [2023-08-24 07:58:42,737 INFO L231 Difference]: Finished difference. Result has 281 places, 1785 transitions, 43291 flow [2023-08-24 07:58:42,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=37157, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=43291, PETRI_PLACES=281, PETRI_TRANSITIONS=1785} [2023-08-24 07:58:42,740 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 262 predicate places. [2023-08-24 07:58:42,740 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 1785 transitions, 43291 flow [2023-08-24 07:58:42,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 96.4) internal successors, (964), 10 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:42,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:58:42,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:58:42,745 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 07:58:42,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 07:58:42,945 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 07:58:42,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:58:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1915724884, now seen corresponding path program 10 times [2023-08-24 07:58:42,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:58:42,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524935686] [2023-08-24 07:58:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:58:42,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:58:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:58:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 07:58:42,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:58:42,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524935686] [2023-08-24 07:58:42,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524935686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:58:42,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811664354] [2023-08-24 07:58:42,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 07:58:42,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:58:42,989 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 07:58:42,992 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 07:58:43,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 07:58:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:58:43,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 07:58:43,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:58:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 07:58:43,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:58:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 07:58:43,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811664354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:58:43,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:58:43,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-24 07:58:43,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813877698] [2023-08-24 07:58:43,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:58:43,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 07:58:43,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:58:43,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 07:58:43,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-24 07:58:43,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 224 [2023-08-24 07:58:43,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 1785 transitions, 43291 flow. Second operand has 8 states, 8 states have (on average 99.875) internal successors, (799), 8 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:43,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:58:43,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 224 [2023-08-24 07:58:43,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:58:47,309 INFO L124 PetriNetUnfolderBase]: 5394/9414 cut-off events. [2023-08-24 07:58:47,309 INFO L125 PetriNetUnfolderBase]: For 261369/261369 co-relation queries the response was YES. [2023-08-24 07:58:47,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87297 conditions, 9414 events. 5394/9414 cut-off events. For 261369/261369 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 69416 event pairs, 392 based on Foata normal form. 578/9992 useless extension candidates. Maximal degree in co-relation 86898. Up to 5483 conditions per place. [2023-08-24 07:58:47,412 INFO L140 encePairwiseOnDemand]: 221/224 looper letters, 1028 selfloop transitions, 306 changer transitions 0/1334 dead transitions. [2023-08-24 07:58:47,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1334 transitions, 34192 flow [2023-08-24 07:58:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 07:58:47,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 07:58:47,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 526 transitions. [2023-08-24 07:58:47,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46964285714285714 [2023-08-24 07:58:47,414 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 526 transitions. [2023-08-24 07:58:47,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 526 transitions. [2023-08-24 07:58:47,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:58:47,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 526 transitions. [2023-08-24 07:58:47,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:47,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:47,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:47,416 INFO L175 Difference]: Start difference. First operand has 281 places, 1785 transitions, 43291 flow. Second operand 5 states and 526 transitions. [2023-08-24 07:58:47,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1334 transitions, 34192 flow [2023-08-24 07:58:49,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1334 transitions, 31457 flow, removed 729 selfloop flow, removed 15 redundant places. [2023-08-24 07:58:49,714 INFO L231 Difference]: Finished difference. Result has 271 places, 1195 transitions, 27062 flow [2023-08-24 07:58:49,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=24503, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=27062, PETRI_PLACES=271, PETRI_TRANSITIONS=1195} [2023-08-24 07:58:49,715 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 252 predicate places. [2023-08-24 07:58:49,715 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 1195 transitions, 27062 flow [2023-08-24 07:58:49,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.875) internal successors, (799), 8 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:49,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:58:49,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:58:49,723 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 07:58:49,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:49,920 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 07:58:49,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:58:49,921 INFO L85 PathProgramCache]: Analyzing trace with hash 793995680, now seen corresponding path program 11 times [2023-08-24 07:58:49,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:58:49,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708636496] [2023-08-24 07:58:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:58:49,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:58:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:58:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 07:58:49,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:58:49,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708636496] [2023-08-24 07:58:49,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708636496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:58:49,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91034812] [2023-08-24 07:58:49,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 07:58:49,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:49,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:58:49,990 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 07:58:49,992 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 07:58:50,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-24 07:58:50,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:58:50,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 07:58:50,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:58:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 07:58:50,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:58:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 07:58:50,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91034812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:58:50,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:58:50,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-08-24 07:58:50,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388678799] [2023-08-24 07:58:50,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:58:50,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 07:58:50,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:58:50,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 07:58:50,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-24 07:58:50,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:58:50,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 1195 transitions, 27062 flow. Second operand has 9 states, 9 states have (on average 96.33333333333333) internal successors, (867), 9 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:50,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:58:50,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:58:50,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:58:53,386 INFO L124 PetriNetUnfolderBase]: 5514/9733 cut-off events. [2023-08-24 07:58:53,386 INFO L125 PetriNetUnfolderBase]: For 240336/240336 co-relation queries the response was YES. [2023-08-24 07:58:53,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88938 conditions, 9733 events. 5514/9733 cut-off events. For 240336/240336 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 73126 event pairs, 256 based on Foata normal form. 14/9747 useless extension candidates. Maximal degree in co-relation 88596. Up to 6525 conditions per place. [2023-08-24 07:58:53,483 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 1177 selfloop transitions, 154 changer transitions 21/1352 dead transitions. [2023-08-24 07:58:53,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1352 transitions, 32334 flow [2023-08-24 07:58:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 07:58:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 07:58:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1486 transitions. [2023-08-24 07:58:53,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44226190476190474 [2023-08-24 07:58:53,485 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1486 transitions. [2023-08-24 07:58:53,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1486 transitions. [2023-08-24 07:58:53,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:58:53,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1486 transitions. [2023-08-24 07:58:53,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 99.06666666666666) internal successors, (1486), 15 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:53,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:53,490 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:53,490 INFO L175 Difference]: Start difference. First operand has 271 places, 1195 transitions, 27062 flow. Second operand 15 states and 1486 transitions. [2023-08-24 07:58:53,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1352 transitions, 32334 flow [2023-08-24 07:58:55,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1352 transitions, 32067 flow, removed 130 selfloop flow, removed 2 redundant places. [2023-08-24 07:58:55,545 INFO L231 Difference]: Finished difference. Result has 287 places, 1243 transitions, 28234 flow [2023-08-24 07:58:55,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=26354, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=28234, PETRI_PLACES=287, PETRI_TRANSITIONS=1243} [2023-08-24 07:58:55,547 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 268 predicate places. [2023-08-24 07:58:55,547 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 1243 transitions, 28234 flow [2023-08-24 07:58:55,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 96.33333333333333) internal successors, (867), 9 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:55,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:58:55,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:58:55,552 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 07:58:55,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 07:58:55,752 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 07:58:55,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:58:55,752 INFO L85 PathProgramCache]: Analyzing trace with hash -965795692, now seen corresponding path program 12 times [2023-08-24 07:58:55,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:58:55,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307565419] [2023-08-24 07:58:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:58:55,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:58:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:58:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:58:55,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:58:55,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307565419] [2023-08-24 07:58:55,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307565419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:58:55,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275201180] [2023-08-24 07:58:55,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 07:58:55,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:58:55,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:58:55,829 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 07:58:55,843 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 07:58:55,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 07:58:55,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:58:55,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 07:58:55,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:58:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:58:55,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:58:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:58:55,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275201180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:58:55,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:58:55,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-24 07:58:55,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19016881] [2023-08-24 07:58:55,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:58:55,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 07:58:55,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:58:55,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 07:58:55,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-24 07:58:55,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:58:55,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 1243 transitions, 28234 flow. Second operand has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:58:55,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:58:55,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:58:55,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:59:00,081 INFO L124 PetriNetUnfolderBase]: 6399/11444 cut-off events. [2023-08-24 07:59:00,081 INFO L125 PetriNetUnfolderBase]: For 326691/326691 co-relation queries the response was YES. [2023-08-24 07:59:00,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106616 conditions, 11444 events. 6399/11444 cut-off events. For 326691/326691 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 89124 event pairs, 242 based on Foata normal form. 212/11656 useless extension candidates. Maximal degree in co-relation 105576. Up to 4631 conditions per place. [2023-08-24 07:59:00,219 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 1099 selfloop transitions, 462 changer transitions 121/1682 dead transitions. [2023-08-24 07:59:00,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1682 transitions, 39344 flow [2023-08-24 07:59:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 07:59:00,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 07:59:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1192 transitions. [2023-08-24 07:59:00,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2023-08-24 07:59:00,221 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1192 transitions. [2023-08-24 07:59:00,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1192 transitions. [2023-08-24 07:59:00,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:59:00,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1192 transitions. [2023-08-24 07:59:00,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.33333333333333) internal successors, (1192), 12 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:00,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 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 07:59:00,226 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 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 07:59:00,227 INFO L175 Difference]: Start difference. First operand has 287 places, 1243 transitions, 28234 flow. Second operand 12 states and 1192 transitions. [2023-08-24 07:59:00,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1682 transitions, 39344 flow [2023-08-24 07:59:03,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1682 transitions, 38745 flow, removed 293 selfloop flow, removed 2 redundant places. [2023-08-24 07:59:03,033 INFO L231 Difference]: Finished difference. Result has 302 places, 1297 transitions, 30938 flow [2023-08-24 07:59:03,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=26055, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=30938, PETRI_PLACES=302, PETRI_TRANSITIONS=1297} [2023-08-24 07:59:03,034 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 283 predicate places. [2023-08-24 07:59:03,034 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 1297 transitions, 30938 flow [2023-08-24 07:59:03,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:03,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:59:03,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:59:03,038 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 07:59:03,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:59:03,235 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 07:59:03,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:59:03,236 INFO L85 PathProgramCache]: Analyzing trace with hash 92124486, now seen corresponding path program 13 times [2023-08-24 07:59:03,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:59:03,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966173993] [2023-08-24 07:59:03,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:59:03,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:59:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:59:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:59:03,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:59:03,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966173993] [2023-08-24 07:59:03,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966173993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:59:03,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559942202] [2023-08-24 07:59:03,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 07:59:03,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:59:03,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:59:03,300 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 07:59:03,307 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 07:59:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:59:03,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 07:59:03,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:59:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:59:03,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:59:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:59:03,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559942202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:59:03,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:59:03,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-08-24 07:59:03,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006722788] [2023-08-24 07:59:03,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:59:03,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 07:59:03,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:59:03,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 07:59:03,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-24 07:59:03,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:59:03,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 1297 transitions, 30938 flow. Second operand has 9 states, 9 states have (on average 96.44444444444444) internal successors, (868), 9 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:03,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:59:03,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:59:03,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:59:07,664 INFO L124 PetriNetUnfolderBase]: 6081/10853 cut-off events. [2023-08-24 07:59:07,664 INFO L125 PetriNetUnfolderBase]: For 370313/370313 co-relation queries the response was YES. [2023-08-24 07:59:07,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106692 conditions, 10853 events. 6081/10853 cut-off events. For 370313/370313 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 83047 event pairs, 466 based on Foata normal form. 366/11219 useless extension candidates. Maximal degree in co-relation 105441. Up to 6459 conditions per place. [2023-08-24 07:59:07,786 INFO L140 encePairwiseOnDemand]: 219/224 looper letters, 999 selfloop transitions, 540 changer transitions 2/1541 dead transitions. [2023-08-24 07:59:07,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1541 transitions, 38699 flow [2023-08-24 07:59:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 07:59:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 07:59:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1100 transitions. [2023-08-24 07:59:07,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2023-08-24 07:59:07,787 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1100 transitions. [2023-08-24 07:59:07,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1100 transitions. [2023-08-24 07:59:07,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:59:07,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1100 transitions. [2023-08-24 07:59:07,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 100.0) internal successors, (1100), 11 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:07,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 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 07:59:07,790 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 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 07:59:07,790 INFO L175 Difference]: Start difference. First operand has 302 places, 1297 transitions, 30938 flow. Second operand 11 states and 1100 transitions. [2023-08-24 07:59:07,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1541 transitions, 38699 flow [2023-08-24 07:59:10,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1541 transitions, 36645 flow, removed 992 selfloop flow, removed 7 redundant places. [2023-08-24 07:59:10,938 INFO L231 Difference]: Finished difference. Result has 307 places, 1357 transitions, 32575 flow [2023-08-24 07:59:10,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=28898, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=32575, PETRI_PLACES=307, PETRI_TRANSITIONS=1357} [2023-08-24 07:59:10,939 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 288 predicate places. [2023-08-24 07:59:10,939 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 1357 transitions, 32575 flow [2023-08-24 07:59:10,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 96.44444444444444) internal successors, (868), 9 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:10,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:59:10,940 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:59:10,944 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 07:59:11,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:59:11,141 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 07:59:11,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:59:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash -675962772, now seen corresponding path program 14 times [2023-08-24 07:59:11,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:59:11,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360480070] [2023-08-24 07:59:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:59:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:59:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:59:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:59:11,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:59:11,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360480070] [2023-08-24 07:59:11,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360480070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 07:59:11,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 07:59:11,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 07:59:11,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045967901] [2023-08-24 07:59:11,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 07:59:11,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 07:59:11,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:59:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 07:59:11,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 07:59:11,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 224 [2023-08-24 07:59:11,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 1357 transitions, 32575 flow. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:11,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:59:11,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 224 [2023-08-24 07:59:11,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:59:14,648 INFO L124 PetriNetUnfolderBase]: 4822/8940 cut-off events. [2023-08-24 07:59:14,648 INFO L125 PetriNetUnfolderBase]: For 280364/280364 co-relation queries the response was YES. [2023-08-24 07:59:14,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87238 conditions, 8940 events. 4822/8940 cut-off events. For 280364/280364 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 68547 event pairs, 1144 based on Foata normal form. 402/9342 useless extension candidates. Maximal degree in co-relation 85433. Up to 4972 conditions per place. [2023-08-24 07:59:14,736 INFO L140 encePairwiseOnDemand]: 221/224 looper letters, 878 selfloop transitions, 235 changer transitions 220/1333 dead transitions. [2023-08-24 07:59:14,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1333 transitions, 35595 flow [2023-08-24 07:59:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 07:59:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 07:59:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 421 transitions. [2023-08-24 07:59:14,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46986607142857145 [2023-08-24 07:59:14,737 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 421 transitions. [2023-08-24 07:59:14,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 421 transitions. [2023-08-24 07:59:14,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:59:14,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 421 transitions. [2023-08-24 07:59:14,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.25) internal successors, (421), 4 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 07:59:14,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:14,739 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:14,739 INFO L175 Difference]: Start difference. First operand has 307 places, 1357 transitions, 32575 flow. Second operand 4 states and 421 transitions. [2023-08-24 07:59:14,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1333 transitions, 35595 flow [2023-08-24 07:59:16,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1333 transitions, 34669 flow, removed 405 selfloop flow, removed 5 redundant places. [2023-08-24 07:59:16,898 INFO L231 Difference]: Finished difference. Result has 304 places, 1027 transitions, 24701 flow [2023-08-24 07:59:16,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=27862, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=24701, PETRI_PLACES=304, PETRI_TRANSITIONS=1027} [2023-08-24 07:59:16,899 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 285 predicate places. [2023-08-24 07:59:16,899 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 1027 transitions, 24701 flow [2023-08-24 07:59:16,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:16,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:59:16,899 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:59:16,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-24 07:59:16,899 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 07:59:16,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:59:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash -16554560, now seen corresponding path program 4 times [2023-08-24 07:59:16,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:59:16,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39624441] [2023-08-24 07:59:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:59:16,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:59:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:59:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:59:16,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:59:16,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39624441] [2023-08-24 07:59:16,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39624441] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:59:16,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318561967] [2023-08-24 07:59:16,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 07:59:16,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:59:16,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:59:16,981 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 07:59:17,009 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 07:59:17,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 07:59:17,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:59:17,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 07:59:17,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:59:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:59:17,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:59:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:59:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318561967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:59:17,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:59:17,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-08-24 07:59:17,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066631487] [2023-08-24 07:59:17,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:59:17,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 07:59:17,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:59:17,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 07:59:17,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-24 07:59:17,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:59:17,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 1027 transitions, 24701 flow. Second operand has 12 states, 12 states have (on average 95.66666666666667) internal successors, (1148), 12 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:17,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:59:17,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:59:17,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:59:20,884 INFO L124 PetriNetUnfolderBase]: 5467/10063 cut-off events. [2023-08-24 07:59:20,884 INFO L125 PetriNetUnfolderBase]: For 344825/344825 co-relation queries the response was YES. [2023-08-24 07:59:20,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101410 conditions, 10063 events. 5467/10063 cut-off events. For 344825/344825 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 76325 event pairs, 514 based on Foata normal form. 132/10195 useless extension candidates. Maximal degree in co-relation 99551. Up to 3245 conditions per place. [2023-08-24 07:59:20,987 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 753 selfloop transitions, 839 changer transitions 1/1593 dead transitions. [2023-08-24 07:59:20,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1593 transitions, 40963 flow [2023-08-24 07:59:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 07:59:20,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 07:59:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2299 transitions. [2023-08-24 07:59:20,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623447204968947 [2023-08-24 07:59:20,991 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2299 transitions. [2023-08-24 07:59:20,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2299 transitions. [2023-08-24 07:59:20,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:59:20,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2299 transitions. [2023-08-24 07:59:20,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 99.95652173913044) internal successors, (2299), 23 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:20,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:20,997 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:20,997 INFO L175 Difference]: Start difference. First operand has 304 places, 1027 transitions, 24701 flow. Second operand 23 states and 2299 transitions. [2023-08-24 07:59:20,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1593 transitions, 40963 flow [2023-08-24 07:59:23,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1593 transitions, 40088 flow, removed 238 selfloop flow, removed 7 redundant places. [2023-08-24 07:59:23,483 INFO L231 Difference]: Finished difference. Result has 329 places, 1331 transitions, 35950 flow [2023-08-24 07:59:23,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=24098, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=35950, PETRI_PLACES=329, PETRI_TRANSITIONS=1331} [2023-08-24 07:59:23,485 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 310 predicate places. [2023-08-24 07:59:23,485 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 1331 transitions, 35950 flow [2023-08-24 07:59:23,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 95.66666666666667) internal successors, (1148), 12 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:23,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:59:23,485 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:59:23,491 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 07:59:23,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:59:23,686 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 07:59:23,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:59:23,686 INFO L85 PathProgramCache]: Analyzing trace with hash -862660922, now seen corresponding path program 5 times [2023-08-24 07:59:23,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:59:23,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722917739] [2023-08-24 07:59:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:59:23,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:59:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:59:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:59:23,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:59:23,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722917739] [2023-08-24 07:59:23,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722917739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:59:23,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480131614] [2023-08-24 07:59:23,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 07:59:23,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:59:23,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:59:23,785 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 07:59:23,818 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 07:59:23,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 07:59:23,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:59:23,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 07:59:23,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:59:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:59:23,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:59:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:59:23,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480131614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:59:23,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:59:23,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-08-24 07:59:23,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380017007] [2023-08-24 07:59:23,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:59:23,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 07:59:23,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:59:23,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 07:59:23,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-24 07:59:23,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-24 07:59:23,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1331 transitions, 35950 flow. Second operand has 12 states, 12 states have (on average 95.83333333333333) internal successors, (1150), 12 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:23,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:59:23,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-24 07:59:23,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:59:28,408 INFO L124 PetriNetUnfolderBase]: 5260/9755 cut-off events. [2023-08-24 07:59:28,408 INFO L125 PetriNetUnfolderBase]: For 384579/384579 co-relation queries the response was YES. [2023-08-24 07:59:28,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103335 conditions, 9755 events. 5260/9755 cut-off events. For 384579/384579 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 74697 event pairs, 82 based on Foata normal form. 112/9867 useless extension candidates. Maximal degree in co-relation 101432. Up to 2999 conditions per place. [2023-08-24 07:59:28,522 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 1024 selfloop transitions, 663 changer transitions 25/1712 dead transitions. [2023-08-24 07:59:28,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1712 transitions, 45857 flow [2023-08-24 07:59:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 07:59:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 07:59:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2381 transitions. [2023-08-24 07:59:28,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44289434523809523 [2023-08-24 07:59:28,525 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2381 transitions. [2023-08-24 07:59:28,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2381 transitions. [2023-08-24 07:59:28,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:59:28,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2381 transitions. [2023-08-24 07:59:28,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 99.20833333333333) internal successors, (2381), 24 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:28,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:28,532 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:28,532 INFO L175 Difference]: Start difference. First operand has 329 places, 1331 transitions, 35950 flow. Second operand 24 states and 2381 transitions. [2023-08-24 07:59:28,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1712 transitions, 45857 flow [2023-08-24 07:59:31,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1712 transitions, 44847 flow, removed 414 selfloop flow, removed 5 redundant places. [2023-08-24 07:59:31,294 INFO L231 Difference]: Finished difference. Result has 352 places, 1341 transitions, 37421 flow [2023-08-24 07:59:31,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34224, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=37421, PETRI_PLACES=352, PETRI_TRANSITIONS=1341} [2023-08-24 07:59:31,295 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 333 predicate places. [2023-08-24 07:59:31,295 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1341 transitions, 37421 flow [2023-08-24 07:59:31,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 95.83333333333333) internal successors, (1150), 12 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:31,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:59:31,296 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:59:31,301 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 07:59:31,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:59:31,496 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 07:59:31,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:59:31,497 INFO L85 PathProgramCache]: Analyzing trace with hash 793791252, now seen corresponding path program 15 times [2023-08-24 07:59:31,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:59:31,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465911262] [2023-08-24 07:59:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:59:31,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:59:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:59:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:59:31,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:59:31,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465911262] [2023-08-24 07:59:31,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465911262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:59:31,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991008162] [2023-08-24 07:59:31,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 07:59:31,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:59:31,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:59:31,557 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 07:59:31,583 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 07:59:31,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 07:59:31,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:59:31,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 07:59:31,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:59:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:59:31,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:59:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 07:59:31,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991008162] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:59:31,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:59:31,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-24 07:59:31,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509677098] [2023-08-24 07:59:31,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:59:31,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 07:59:31,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:59:31,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 07:59:31,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-24 07:59:31,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 224 [2023-08-24 07:59:31,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1341 transitions, 37421 flow. Second operand has 11 states, 11 states have (on average 99.54545454545455) internal successors, (1095), 11 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:31,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:59:31,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 224 [2023-08-24 07:59:31,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:59:37,628 INFO L124 PetriNetUnfolderBase]: 7296/13519 cut-off events. [2023-08-24 07:59:37,629 INFO L125 PetriNetUnfolderBase]: For 595615/595615 co-relation queries the response was YES. [2023-08-24 07:59:37,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147344 conditions, 13519 events. 7296/13519 cut-off events. For 595615/595615 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 109735 event pairs, 317 based on Foata normal form. 410/13929 useless extension candidates. Maximal degree in co-relation 145852. Up to 5039 conditions per place. [2023-08-24 07:59:37,801 INFO L140 encePairwiseOnDemand]: 221/224 looper letters, 1638 selfloop transitions, 431 changer transitions 24/2093 dead transitions. [2023-08-24 07:59:37,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 2093 transitions, 63873 flow [2023-08-24 07:59:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 07:59:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 07:59:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 739 transitions. [2023-08-24 07:59:37,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47130102040816324 [2023-08-24 07:59:37,802 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 739 transitions. [2023-08-24 07:59:37,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 739 transitions. [2023-08-24 07:59:37,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:59:37,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 739 transitions. [2023-08-24 07:59:37,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.57142857142857) internal successors, (739), 7 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:37,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:37,804 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:37,804 INFO L175 Difference]: Start difference. First operand has 352 places, 1341 transitions, 37421 flow. Second operand 7 states and 739 transitions. [2023-08-24 07:59:37,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 2093 transitions, 63873 flow [2023-08-24 07:59:43,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 2093 transitions, 60533 flow, removed 1496 selfloop flow, removed 8 redundant places. [2023-08-24 07:59:43,111 INFO L231 Difference]: Finished difference. Result has 348 places, 1388 transitions, 38612 flow [2023-08-24 07:59:43,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=33052, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=38612, PETRI_PLACES=348, PETRI_TRANSITIONS=1388} [2023-08-24 07:59:43,112 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 329 predicate places. [2023-08-24 07:59:43,113 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1388 transitions, 38612 flow [2023-08-24 07:59:43,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 99.54545454545455) internal successors, (1095), 11 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:43,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:59:43,113 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:59:43,120 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 07:59:43,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-24 07:59:43,318 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 07:59:43,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:59:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1483838864, now seen corresponding path program 16 times [2023-08-24 07:59:43,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:59:43,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136305961] [2023-08-24 07:59:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:59:43,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:59:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:59:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:59:43,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:59:43,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136305961] [2023-08-24 07:59:43,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136305961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 07:59:43,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326730211] [2023-08-24 07:59:43,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 07:59:43,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 07:59:43,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:59:43,629 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 07:59:43,655 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 07:59:43,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 07:59:43,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 07:59:43,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 07:59:43,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 07:59:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:59:44,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 07:59:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 07:59:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326730211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 07:59:44,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 07:59:44,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-24 07:59:44,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942130561] [2023-08-24 07:59:44,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 07:59:44,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 07:59:44,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:59:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 07:59:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-24 07:59:44,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 07:59:44,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1388 transitions, 38612 flow. Second operand has 21 states, 21 states have (on average 85.52380952380952) internal successors, (1796), 21 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:44,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:59:44,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 07:59:44,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:59:50,627 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 [0, 1] [2023-08-24 07:59:56,581 INFO L124 PetriNetUnfolderBase]: 7975/14846 cut-off events. [2023-08-24 07:59:56,582 INFO L125 PetriNetUnfolderBase]: For 580654/580654 co-relation queries the response was YES. [2023-08-24 07:59:56,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159108 conditions, 14846 events. 7975/14846 cut-off events. For 580654/580654 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 122866 event pairs, 742 based on Foata normal form. 20/14866 useless extension candidates. Maximal degree in co-relation 156918. Up to 13663 conditions per place. [2023-08-24 07:59:56,760 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 1502 selfloop transitions, 165 changer transitions 19/1686 dead transitions. [2023-08-24 07:59:56,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1686 transitions, 49709 flow [2023-08-24 07:59:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 07:59:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 07:59:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1625 transitions. [2023-08-24 07:59:56,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40302579365079366 [2023-08-24 07:59:56,762 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1625 transitions. [2023-08-24 07:59:56,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1625 transitions. [2023-08-24 07:59:56,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:59:56,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1625 transitions. [2023-08-24 07:59:56,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 90.27777777777777) internal successors, (1625), 18 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:56,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:56,766 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 07:59:56,766 INFO L175 Difference]: Start difference. First operand has 348 places, 1388 transitions, 38612 flow. Second operand 18 states and 1625 transitions. [2023-08-24 07:59:56,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1686 transitions, 49709 flow [2023-08-24 08:00:01,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1686 transitions, 48944 flow, removed 153 selfloop flow, removed 4 redundant places. [2023-08-24 08:00:01,832 INFO L231 Difference]: Finished difference. Result has 370 places, 1526 transitions, 42758 flow [2023-08-24 08:00:01,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=37965, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=42758, PETRI_PLACES=370, PETRI_TRANSITIONS=1526} [2023-08-24 08:00:01,833 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 351 predicate places. [2023-08-24 08:00:01,833 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1526 transitions, 42758 flow [2023-08-24 08:00:01,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.52380952380952) internal successors, (1796), 21 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:01,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:01,834 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:01,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:02,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 08:00:02,034 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 08:00:02,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash 351091990, now seen corresponding path program 17 times [2023-08-24 08:00:02,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:02,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067992987] [2023-08-24 08:00:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:02,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:02,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:02,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067992987] [2023-08-24 08:00:02,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067992987] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:02,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299494873] [2023-08-24 08:00:02,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:00:02,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:02,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:02,313 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 08:00:02,339 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 08:00:02,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 08:00:02,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:02,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 08:00:02,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:02,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:03,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299494873] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:03,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:03,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-24 08:00:03,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388453061] [2023-08-24 08:00:03,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:03,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 08:00:03,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:03,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 08:00:03,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-08-24 08:00:03,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 08:00:03,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1526 transitions, 42758 flow. Second operand has 21 states, 21 states have (on average 85.47619047619048) internal successors, (1795), 21 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:03,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:03,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 08:00:03,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:16,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:00:20,072 WARN L539 Checker$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 08:00:22,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-24 08:00:24,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-24 08:00:29,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:00:31,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:00:33,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:00:35,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:00:37,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:00:40,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:00:42,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:00:45,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:00:47,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:00:49,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:00:54,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:00:56,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:01:02,218 INFO L124 PetriNetUnfolderBase]: 8824/16477 cut-off events. [2023-08-24 08:01:02,218 INFO L125 PetriNetUnfolderBase]: For 664178/664178 co-relation queries the response was YES. [2023-08-24 08:01:02,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179083 conditions, 16477 events. 8824/16477 cut-off events. For 664178/664178 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 138658 event pairs, 848 based on Foata normal form. 26/16503 useless extension candidates. Maximal degree in co-relation 174121. Up to 15009 conditions per place. [2023-08-24 08:01:02,434 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 1669 selfloop transitions, 201 changer transitions 32/1902 dead transitions. [2023-08-24 08:01:02,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1902 transitions, 56780 flow [2023-08-24 08:01:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 08:01:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 08:01:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1979 transitions. [2023-08-24 08:01:02,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015827922077922 [2023-08-24 08:01:02,436 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1979 transitions. [2023-08-24 08:01:02,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1979 transitions. [2023-08-24 08:01:02,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:02,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1979 transitions. [2023-08-24 08:01:02,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 89.95454545454545) internal successors, (1979), 22 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:02,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:02,441 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:02,441 INFO L175 Difference]: Start difference. First operand has 370 places, 1526 transitions, 42758 flow. Second operand 22 states and 1979 transitions. [2023-08-24 08:01:02,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1902 transitions, 56780 flow [2023-08-24 08:01:08,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1902 transitions, 56010 flow, removed 377 selfloop flow, removed 5 redundant places. [2023-08-24 08:01:08,678 INFO L231 Difference]: Finished difference. Result has 395 places, 1700 transitions, 48151 flow [2023-08-24 08:01:08,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=41988, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=48151, PETRI_PLACES=395, PETRI_TRANSITIONS=1700} [2023-08-24 08:01:08,680 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 376 predicate places. [2023-08-24 08:01:08,680 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1700 transitions, 48151 flow [2023-08-24 08:01:08,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.47619047619048) internal successors, (1795), 21 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:08,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:08,680 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:08,684 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 08:01:08,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 08:01:08,881 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 08:01:08,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:08,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1811320966, now seen corresponding path program 18 times [2023-08-24 08:01:08,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:08,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129991267] [2023-08-24 08:01:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:08,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:09,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:09,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129991267] [2023-08-24 08:01:09,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129991267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:09,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746743996] [2023-08-24 08:01:09,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:01:09,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:09,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:09,157 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 08:01:09,169 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 08:01:09,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-24 08:01:09,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:09,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 08:01:09,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:09,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:01:42,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746743996] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:42,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:42,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-24 08:01:42,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339780657] [2023-08-24 08:01:42,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:42,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 08:01:42,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 08:01:42,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=340, Unknown=14, NotChecked=0, Total=420 [2023-08-24 08:01:42,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 08:01:42,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1700 transitions, 48151 flow. Second operand has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:42,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:42,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 08:01:42,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:44,655 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse3 (+ c_~j1~0 1))) (and (or (let ((.cse2 (* c_~m~0 2))) (let ((.cse1 (+ c_~k2~0 .cse2 (* (div (+ c_~k1~0 1) 4294967296) 4294967296))) (.cse0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296))) (and (< (+ .cse0 c_~k1~0) .cse1) (<= .cse1 (+ .cse0 c_~k1~0 1))))) (< c_~j1~0 c_~m~0)) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse3 ~m~0) (let ((.cse4 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse4) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse4 .cse5))))) (forall ((~m~0 Int)) (or (let ((.cse6 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse6 .cse5) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse3 ~m~0))) (< 0 c_~m~0) (<= c_~m~0 1) (= (mod (+ (* c_~m~0 4294967295) c_~k2~0) 4294967296) 0) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-08-24 08:01:47,509 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-24 08:01:50,946 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-08-24 08:01:58,987 INFO L124 PetriNetUnfolderBase]: 9273/17371 cut-off events. [2023-08-24 08:01:58,987 INFO L125 PetriNetUnfolderBase]: For 743960/743960 co-relation queries the response was YES. [2023-08-24 08:01:59,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192852 conditions, 17371 events. 9273/17371 cut-off events. For 743960/743960 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 148103 event pairs, 895 based on Foata normal form. 11/17382 useless extension candidates. Maximal degree in co-relation 189597. Up to 16419 conditions per place. [2023-08-24 08:01:59,252 INFO L140 encePairwiseOnDemand]: 216/224 looper letters, 1790 selfloop transitions, 145 changer transitions 11/1946 dead transitions. [2023-08-24 08:01:59,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1946 transitions, 58802 flow [2023-08-24 08:01:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 08:01:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 08:01:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1615 transitions. [2023-08-24 08:01:59,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40054563492063494 [2023-08-24 08:01:59,255 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1615 transitions. [2023-08-24 08:01:59,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1615 transitions. [2023-08-24 08:01:59,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:59,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1615 transitions. [2023-08-24 08:01:59,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 89.72222222222223) internal successors, (1615), 18 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 08:01:59,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:59,260 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:59,260 INFO L175 Difference]: Start difference. First operand has 395 places, 1700 transitions, 48151 flow. Second operand 18 states and 1615 transitions. [2023-08-24 08:01:59,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1946 transitions, 58802 flow [2023-08-24 08:02:06,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1946 transitions, 57258 flow, removed 761 selfloop flow, removed 5 redundant places. [2023-08-24 08:02:07,013 INFO L231 Difference]: Finished difference. Result has 417 places, 1813 transitions, 50672 flow [2023-08-24 08:02:07,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=46695, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=50672, PETRI_PLACES=417, PETRI_TRANSITIONS=1813} [2023-08-24 08:02:07,014 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 398 predicate places. [2023-08-24 08:02:07,014 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 1813 transitions, 50672 flow [2023-08-24 08:02:07,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:07,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:07,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:07,023 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 08:02:07,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:07,221 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 08:02:07,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:07,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1559351968, now seen corresponding path program 19 times [2023-08-24 08:02:07,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:07,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593168941] [2023-08-24 08:02:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:07,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:07,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:07,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593168941] [2023-08-24 08:02:07,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593168941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:07,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794961101] [2023-08-24 08:02:07,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:02:07,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:07,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:07,617 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 08:02:07,634 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 08:02:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:07,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 08:02:07,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:08,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:08,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794961101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:08,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:08,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 08:02:08,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588120596] [2023-08-24 08:02:08,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:08,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:02:08,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:08,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:02:08,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-08-24 08:02:08,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 08:02:08,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1813 transitions, 50672 flow. Second operand has 22 states, 22 states have (on average 85.31818181818181) internal successors, (1877), 22 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:08,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:08,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 08:02:08,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:24,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:27,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:36,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:38,258 INFO L124 PetriNetUnfolderBase]: 10806/20314 cut-off events. [2023-08-24 08:02:38,259 INFO L125 PetriNetUnfolderBase]: For 942729/942729 co-relation queries the response was YES. [2023-08-24 08:02:38,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240890 conditions, 20314 events. 10806/20314 cut-off events. For 942729/942729 co-relation queries the response was YES. Maximal size of possible extension queue 1200. Compared 178025 event pairs, 836 based on Foata normal form. 12/20326 useless extension candidates. Maximal degree in co-relation 236222. Up to 12382 conditions per place. [2023-08-24 08:02:38,579 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 1068 selfloop transitions, 1364 changer transitions 22/2454 dead transitions. [2023-08-24 08:02:38,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 2454 transitions, 73835 flow [2023-08-24 08:02:38,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 08:02:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 08:02:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3024 transitions. [2023-08-24 08:02:38,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39705882352941174 [2023-08-24 08:02:38,582 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3024 transitions. [2023-08-24 08:02:38,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3024 transitions. [2023-08-24 08:02:38,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:38,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3024 transitions. [2023-08-24 08:02:38,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 88.94117647058823) internal successors, (3024), 34 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:38,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:38,590 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:38,590 INFO L175 Difference]: Start difference. First operand has 417 places, 1813 transitions, 50672 flow. Second operand 34 states and 3024 transitions. [2023-08-24 08:02:38,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 2454 transitions, 73835 flow [2023-08-24 08:02:49,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 2454 transitions, 73025 flow, removed 394 selfloop flow, removed 6 redundant places. [2023-08-24 08:02:49,078 INFO L231 Difference]: Finished difference. Result has 457 places, 2229 transitions, 69517 flow [2023-08-24 08:02:49,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=49966, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=992, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=69517, PETRI_PLACES=457, PETRI_TRANSITIONS=2229} [2023-08-24 08:02:49,080 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 438 predicate places. [2023-08-24 08:02:49,080 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 2229 transitions, 69517 flow [2023-08-24 08:02:49,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 85.31818181818181) internal successors, (1877), 22 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:49,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:49,080 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:49,088 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 08:02:49,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 08:02:49,286 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 08:02:49,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:49,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1704281468, now seen corresponding path program 20 times [2023-08-24 08:02:49,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:49,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213802176] [2023-08-24 08:02:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:49,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:49,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:49,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213802176] [2023-08-24 08:02:49,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213802176] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:49,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681917268] [2023-08-24 08:02:49,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:02:49,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:49,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:49,567 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 08:02:49,595 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 08:02:49,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:02:49,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:49,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 08:02:49,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:50,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:50,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681917268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:50,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:50,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-24 08:02:50,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129758457] [2023-08-24 08:02:50,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:50,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 08:02:50,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:50,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 08:02:50,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-08-24 08:02:50,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 08:02:50,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 2229 transitions, 69517 flow. Second operand has 21 states, 21 states have (on average 85.57142857142857) internal successors, (1797), 21 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:50,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:50,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 08:02:50,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:21,583 WARN L234 SmtUtils]: Spent 23.45s on a formula simplification. DAG size of input: 60 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 08:03:31,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:03:34,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:03:36,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:03:38,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:03:40,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:03:42,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:03:44,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:03:47,519 WARN L539 Checker$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 08:03:49,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:03:53,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:03:55,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:03:58,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:04:00,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:04:02,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:04:04,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:04:28,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:04:31,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:04:33,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:04:36,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:04:38,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:04:41,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:04:43,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:04:45,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:04:47,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:04:49,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:04:51,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:04:52,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-24 08:04:55,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:04:58,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:05:00,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 08:05:15,388 INFO L124 PetriNetUnfolderBase]: 12248/23143 cut-off events. [2023-08-24 08:05:15,389 INFO L125 PetriNetUnfolderBase]: For 1239589/1239589 co-relation queries the response was YES. [2023-08-24 08:05:15,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291293 conditions, 23143 events. 12248/23143 cut-off events. For 1239589/1239589 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 204319 event pairs, 1190 based on Foata normal form. 28/23171 useless extension candidates. Maximal degree in co-relation 284729. Up to 20127 conditions per place. [2023-08-24 08:05:15,810 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 2309 selfloop transitions, 431 changer transitions 33/2773 dead transitions. [2023-08-24 08:05:15,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2773 transitions, 92084 flow [2023-08-24 08:05:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 08:05:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 08:05:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2771 transitions. [2023-08-24 08:05:15,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990495391705069 [2023-08-24 08:05:15,812 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2771 transitions. [2023-08-24 08:05:15,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2771 transitions. [2023-08-24 08:05:15,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:05:15,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2771 transitions. [2023-08-24 08:05:15,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 89.38709677419355) internal successors, (2771), 31 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:15,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:15,818 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:15,819 INFO L175 Difference]: Start difference. First operand has 457 places, 2229 transitions, 69517 flow. Second operand 31 states and 2771 transitions. [2023-08-24 08:05:15,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2773 transitions, 92084 flow [2023-08-24 08:05:30,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 2773 transitions, 89084 flow, removed 1468 selfloop flow, removed 15 redundant places. [2023-08-24 08:05:31,059 INFO L231 Difference]: Finished difference. Result has 486 places, 2521 transitions, 78814 flow [2023-08-24 08:05:31,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=66753, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1941, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=78814, PETRI_PLACES=486, PETRI_TRANSITIONS=2521} [2023-08-24 08:05:31,061 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 467 predicate places. [2023-08-24 08:05:31,062 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 2521 transitions, 78814 flow [2023-08-24 08:05:31,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.57142857142857) internal successors, (1797), 21 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:31,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:05:31,062 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:05:31,068 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 08:05:31,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 08:05:31,268 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 08:05:31,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:05:31,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1960753912, now seen corresponding path program 21 times [2023-08-24 08:05:31,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:05:31,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436654659] [2023-08-24 08:05:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:05:31,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:05:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:05:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:05:31,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:05:31,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436654659] [2023-08-24 08:05:31,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436654659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:05:31,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027215309] [2023-08-24 08:05:31,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:05:31,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:05:31,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:05:31,573 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 08:05:31,600 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 08:05:32,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:05:32,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:05:32,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 08:05:32,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:05:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:05:32,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:06:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:06:07,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027215309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:06:07,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:06:07,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-24 08:06:07,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307606080] [2023-08-24 08:06:07,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:06:07,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 08:06:07,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:06:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 08:06:07,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=342, Unknown=14, NotChecked=0, Total=420 [2023-08-24 08:06:07,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 08:06:07,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 2521 transitions, 78814 flow. Second operand has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:07,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:06:07,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 08:06:07,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:06:18,931 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* 4294967296 (div c_~k2~0 4294967296)))) (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse6 (* (div (+ c_~k1~0 1) 4294967296) 4294967296)) (.cse7 (< c_~j1~0 c_~m~0)) (.cse5 (+ .cse4 c_~k1~0)) (.cse11 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (or (let ((.cse3 (+ c_~k2~0 .cse6))) (and (<= .cse3 (+ .cse4 c_~k1~0 1)) (< .cse5 .cse3))) .cse7) (forall ((~m~0 Int)) (or (let ((.cse8 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse8 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse8) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (or (let ((.cse10 (+ c_~k2~0 c_~m~0 .cse6)) (.cse9 (* (div (+ c_~k2~0 c_~m~0) 4294967296) 4294967296))) (and (< (+ .cse9 c_~k1~0) .cse10) (<= .cse10 (+ .cse9 c_~k1~0 1)))) .cse7) (<= (+ c_~k2~0 .cse11) .cse5) (< .cse5 (+ c_~k2~0 .cse11 1))))) is different from false [2023-08-24 08:06:35,130 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-24 08:06:47,405 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-08-24 08:06:59,691 INFO L124 PetriNetUnfolderBase]: 12674/23933 cut-off events. [2023-08-24 08:06:59,691 INFO L125 PetriNetUnfolderBase]: For 1294691/1294691 co-relation queries the response was YES. [2023-08-24 08:07:00,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301374 conditions, 23933 events. 12674/23933 cut-off events. For 1294691/1294691 co-relation queries the response was YES. Maximal size of possible extension queue 1292. Compared 212462 event pairs, 1076 based on Foata normal form. 9/23942 useless extension candidates. Maximal degree in co-relation 297834. Up to 16193 conditions per place. [2023-08-24 08:07:00,269 INFO L140 encePairwiseOnDemand]: 216/224 looper letters, 1354 selfloop transitions, 1401 changer transitions 19/2774 dead transitions. [2023-08-24 08:07:00,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 2774 transitions, 91337 flow [2023-08-24 08:07:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:07:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:07:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2215 transitions. [2023-08-24 08:07:00,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39553571428571427 [2023-08-24 08:07:00,271 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2215 transitions. [2023-08-24 08:07:00,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2215 transitions. [2023-08-24 08:07:00,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:07:00,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2215 transitions. [2023-08-24 08:07:00,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 88.6) internal successors, (2215), 25 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:00,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 224.0) internal successors, (5824), 26 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:00,277 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 224.0) internal successors, (5824), 26 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:00,277 INFO L175 Difference]: Start difference. First operand has 486 places, 2521 transitions, 78814 flow. Second operand 25 states and 2215 transitions. [2023-08-24 08:07:00,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 2774 transitions, 91337 flow [2023-08-24 08:07:17,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 2774 transitions, 89233 flow, removed 1028 selfloop flow, removed 10 redundant places. [2023-08-24 08:07:17,257 INFO L231 Difference]: Finished difference. Result has 513 places, 2658 transitions, 86049 flow [2023-08-24 08:07:17,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=76710, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=86049, PETRI_PLACES=513, PETRI_TRANSITIONS=2658} [2023-08-24 08:07:17,260 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 494 predicate places. [2023-08-24 08:07:17,260 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 2658 transitions, 86049 flow [2023-08-24 08:07:17,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:17,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:07:17,261 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:07:17,269 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 08:07:17,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:07:17,466 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 08:07:17,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:07:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash -155023124, now seen corresponding path program 22 times [2023-08-24 08:07:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:07:17,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766863231] [2023-08-24 08:07:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:07:17,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:07:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:07:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:07:17,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:07:17,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766863231] [2023-08-24 08:07:17,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766863231] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:07:17,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617979502] [2023-08-24 08:07:17,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:07:17,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:07:17,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:07:17,781 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 08:07:17,785 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 08:07:18,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:07:18,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:07:18,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 08:07:18,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:07:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:07:18,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:07:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:07:18,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617979502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:07:18,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:07:18,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 08:07:18,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725593722] [2023-08-24 08:07:18,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:07:18,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:07:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:07:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:07:18,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-08-24 08:07:18,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 08:07:18,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 2658 transitions, 86049 flow. Second operand has 22 states, 22 states have (on average 85.27272727272727) internal successors, (1876), 22 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:18,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:07:18,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 08:07:18,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:07:24,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-24 08:07:49,408 INFO L124 PetriNetUnfolderBase]: 13216/24952 cut-off events. [2023-08-24 08:07:49,408 INFO L125 PetriNetUnfolderBase]: For 1491196/1491196 co-relation queries the response was YES. [2023-08-24 08:07:50,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333647 conditions, 24952 events. 13216/24952 cut-off events. For 1491196/1491196 co-relation queries the response was YES. Maximal size of possible extension queue 1364. Compared 223814 event pairs, 1179 based on Foata normal form. 13/24965 useless extension candidates. Maximal degree in co-relation 332557. Up to 12460 conditions per place. [2023-08-24 08:07:50,210 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 1578 selfloop transitions, 1333 changer transitions 23/2934 dead transitions. [2023-08-24 08:07:50,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 2934 transitions, 100562 flow [2023-08-24 08:07:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 08:07:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 08:07:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2035 transitions. [2023-08-24 08:07:50,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39499223602484473 [2023-08-24 08:07:50,213 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2035 transitions. [2023-08-24 08:07:50,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2035 transitions. [2023-08-24 08:07:50,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:07:50,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2035 transitions. [2023-08-24 08:07:50,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 88.47826086956522) internal successors, (2035), 23 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:50,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:50,219 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:50,219 INFO L175 Difference]: Start difference. First operand has 513 places, 2658 transitions, 86049 flow. Second operand 23 states and 2035 transitions. [2023-08-24 08:07:50,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 2934 transitions, 100562 flow [2023-08-24 08:08:09,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 2934 transitions, 99183 flow, removed 680 selfloop flow, removed 6 redundant places. [2023-08-24 08:08:09,715 INFO L231 Difference]: Finished difference. Result has 540 places, 2817 transitions, 94059 flow [2023-08-24 08:08:09,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=84670, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=94059, PETRI_PLACES=540, PETRI_TRANSITIONS=2817} [2023-08-24 08:08:09,717 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 521 predicate places. [2023-08-24 08:08:09,717 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 2817 transitions, 94059 flow [2023-08-24 08:08:09,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 85.27272727272727) internal successors, (1876), 22 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:09,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:08:09,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:08:09,722 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 08:08:09,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:08:09,918 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 08:08:09,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:08:09,919 INFO L85 PathProgramCache]: Analyzing trace with hash -641647828, now seen corresponding path program 23 times [2023-08-24 08:08:09,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:08:09,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349415953] [2023-08-24 08:08:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:08:09,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:08:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:08:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:10,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:08:10,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349415953] [2023-08-24 08:08:10,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349415953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:08:10,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976765587] [2023-08-24 08:08:10,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:08:10,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:08:10,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:08:10,385 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 08:08:10,389 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 08:08:10,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 08:08:10,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:08:10,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 08:08:10,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:08:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:10,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:08:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:11,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976765587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:08:11,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:08:11,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-24 08:08:11,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592245018] [2023-08-24 08:08:11,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:08:11,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 08:08:11,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:08:11,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 08:08:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-08-24 08:08:11,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 08:08:11,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 2817 transitions, 94059 flow. Second operand has 21 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:11,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:08:11,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 08:08:11,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:08:41,006 INFO L124 PetriNetUnfolderBase]: 13906/26265 cut-off events. [2023-08-24 08:08:41,006 INFO L125 PetriNetUnfolderBase]: For 1635586/1635586 co-relation queries the response was YES. [2023-08-24 08:08:41,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357140 conditions, 26265 events. 13906/26265 cut-off events. For 1635586/1635586 co-relation queries the response was YES. Maximal size of possible extension queue 1450. Compared 237824 event pairs, 1235 based on Foata normal form. 8/26273 useless extension candidates. Maximal degree in co-relation 356104. Up to 13053 conditions per place. [2023-08-24 08:08:42,056 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 1689 selfloop transitions, 1427 changer transitions 48/3164 dead transitions. [2023-08-24 08:08:42,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 3164 transitions, 111096 flow [2023-08-24 08:08:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 08:08:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 08:08:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2134 transitions. [2023-08-24 08:08:42,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39694940476190477 [2023-08-24 08:08:42,059 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2134 transitions. [2023-08-24 08:08:42,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2134 transitions. [2023-08-24 08:08:42,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:08:42,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2134 transitions. [2023-08-24 08:08:42,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 88.91666666666667) internal successors, (2134), 24 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:42,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:42,066 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:42,066 INFO L175 Difference]: Start difference. First operand has 540 places, 2817 transitions, 94059 flow. Second operand 24 states and 2134 transitions. [2023-08-24 08:08:42,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 3164 transitions, 111096 flow [2023-08-24 08:09:03,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 3164 transitions, 108881 flow, removed 1101 selfloop flow, removed 4 redundant places. [2023-08-24 08:09:03,654 INFO L231 Difference]: Finished difference. Result has 570 places, 3021 transitions, 105481 flow [2023-08-24 08:09:03,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=91844, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=105481, PETRI_PLACES=570, PETRI_TRANSITIONS=3021} [2023-08-24 08:09:03,656 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 551 predicate places. [2023-08-24 08:09:03,656 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 3021 transitions, 105481 flow [2023-08-24 08:09:03,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:03,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:09:03,657 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:09:03,661 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 08:09:03,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:09:03,857 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 08:09:03,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:09:03,858 INFO L85 PathProgramCache]: Analyzing trace with hash -428826602, now seen corresponding path program 24 times [2023-08-24 08:09:03,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:09:03,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693171239] [2023-08-24 08:09:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:09:03,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:09:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:09:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:04,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:09:04,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693171239] [2023-08-24 08:09:04,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693171239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:09:04,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420985363] [2023-08-24 08:09:04,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:09:04,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:09:04,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:09:04,221 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 08:09:04,222 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 08:09:04,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 08:09:04,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:09:04,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 08:09:04,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:09:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:04,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:09:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:05,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420985363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:09:05,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:09:05,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-08-24 08:09:05,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688199231] [2023-08-24 08:09:05,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:09:05,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:09:05,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:09:05,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:09:05,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-08-24 08:09:05,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 08:09:05,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 3021 transitions, 105481 flow. Second operand has 23 states, 23 states have (on average 85.26086956521739) internal successors, (1961), 23 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:05,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:09:05,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 08:09:05,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:09:44,314 INFO L124 PetriNetUnfolderBase]: 18243/34193 cut-off events. [2023-08-24 08:09:44,315 INFO L125 PetriNetUnfolderBase]: For 2330205/2330205 co-relation queries the response was YES. [2023-08-24 08:09:45,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495054 conditions, 34193 events. 18243/34193 cut-off events. For 2330205/2330205 co-relation queries the response was YES. Maximal size of possible extension queue 1755. Compared 318447 event pairs, 1345 based on Foata normal form. 10/34203 useless extension candidates. Maximal degree in co-relation 493999. Up to 18401 conditions per place. [2023-08-24 08:09:45,416 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 2018 selfloop transitions, 2232 changer transitions 28/4278 dead transitions. [2023-08-24 08:09:45,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 4278 transitions, 161738 flow [2023-08-24 08:09:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 08:09:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 08:09:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2957 transitions. [2023-08-24 08:09:45,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40002705627705626 [2023-08-24 08:09:45,419 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2957 transitions. [2023-08-24 08:09:45,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2957 transitions. [2023-08-24 08:09:45,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:09:45,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2957 transitions. [2023-08-24 08:09:45,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 89.60606060606061) internal successors, (2957), 33 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:45,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:45,428 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:45,428 INFO L175 Difference]: Start difference. First operand has 570 places, 3021 transitions, 105481 flow. Second operand 33 states and 2957 transitions. [2023-08-24 08:09:45,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 4278 transitions, 161738 flow [2023-08-24 08:10:24,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 4278 transitions, 159427 flow, removed 1151 selfloop flow, removed 3 redundant places. [2023-08-24 08:10:24,610 INFO L231 Difference]: Finished difference. Result has 611 places, 3889 transitions, 151300 flow [2023-08-24 08:10:24,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=103608, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=151300, PETRI_PLACES=611, PETRI_TRANSITIONS=3889} [2023-08-24 08:10:24,613 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 592 predicate places. [2023-08-24 08:10:24,613 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 3889 transitions, 151300 flow [2023-08-24 08:10:24,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 85.26086956521739) internal successors, (1961), 23 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:10:24,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:10:24,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:10:24,617 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 08:10:24,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:10:24,814 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 08:10:24,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:10:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash -750093574, now seen corresponding path program 25 times [2023-08-24 08:10:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:10:24,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685783830] [2023-08-24 08:10:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:10:24,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:10:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:10:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:10:25,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:10:25,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685783830] [2023-08-24 08:10:25,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685783830] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:10:25,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132652436] [2023-08-24 08:10:25,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:10:25,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:10:25,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:10:25,165 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 08:10:25,169 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 08:10:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:10:25,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 08:10:25,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:10:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:10:25,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:10:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:10:26,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132652436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:10:26,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:10:26,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-24 08:10:26,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80833389] [2023-08-24 08:10:26,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:10:26,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 08:10:26,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:10:26,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 08:10:26,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-08-24 08:10:26,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-24 08:10:26,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 3889 transitions, 151300 flow. Second operand has 21 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:10:26,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:10:26,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-24 08:10:26,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-24 08:11:22,447 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 08:11:22,447 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 08:11:23,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-24 08:11:23,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-24 08:11:23,995 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 08:11:23,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-24 08:11:23,995 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-24 08:11:23,996 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 08:11:23,996 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 08:11:23,997 INFO L445 BasicCegarLoop]: Path program histogram: [25, 5, 2, 1, 1] [2023-08-24 08:11:23,999 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 08:11:23,999 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 08:11:24,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 08:11:24 BasicIcfg [2023-08-24 08:11:24,001 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 08:11:24,001 INFO L158 Benchmark]: Toolchain (without parser) took 823808.80ms. Allocated memory was 400.6MB in the beginning and 9.2GB in the end (delta: 8.8GB). Free memory was 377.6MB in the beginning and 5.1GB in the end (delta: -4.7GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. [2023-08-24 08:11:24,001 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 400.6MB. Free memory is still 377.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 08:11:24,001 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.24ms. Allocated memory is still 400.6MB. Free memory was 377.1MB in the beginning and 366.2MB in the end (delta: 11.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2023-08-24 08:11:24,002 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.56ms. Allocated memory is still 400.6MB. Free memory was 366.2MB in the beginning and 364.7MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-24 08:11:24,002 INFO L158 Benchmark]: Boogie Preprocessor took 33.88ms. Allocated memory is still 400.6MB. Free memory was 364.7MB in the beginning and 363.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:11:24,002 INFO L158 Benchmark]: RCFGBuilder took 385.68ms. Allocated memory is still 400.6MB. Free memory was 363.1MB in the beginning and 349.4MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 08:11:24,002 INFO L158 Benchmark]: TraceAbstraction took 823107.24ms. Allocated memory was 400.6MB in the beginning and 9.2GB in the end (delta: 8.8GB). Free memory was 348.4MB in the beginning and 5.1GB in the end (delta: -4.7GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. [2023-08-24 08:11:24,003 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 400.6MB. Free memory is still 377.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 231.24ms. Allocated memory is still 400.6MB. Free memory was 377.1MB in the beginning and 366.2MB in the end (delta: 11.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 45.56ms. Allocated memory is still 400.6MB. Free memory was 366.2MB in the beginning and 364.7MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.88ms. Allocated memory is still 400.6MB. Free memory was 364.7MB in the beginning and 363.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 385.68ms. Allocated memory is still 400.6MB. Free memory was 363.1MB in the beginning and 349.4MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 823107.24ms. Allocated memory was 400.6MB in the beginning and 9.2GB in the end (delta: 8.8GB). Free memory was 348.4MB in the beginning and 5.1GB in the end (delta: -4.7GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 107 PlacesBefore, 19 PlacesAfterwards, 109 TransitionsBefore, 15 TransitionsAfterwards, 756 CoEnabledTransitionPairs, 7 FixpointIterations, 63 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 6 ConcurrentYvCompositions, 6 ChoiceCompositions, 105 TotalNumberOfCompositions, 744 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 744, independent: 744, independent conditional: 0, independent unconditional: 744, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 408, independent: 408, independent conditional: 0, independent unconditional: 408, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 744, independent: 336, independent conditional: 0, independent unconditional: 336, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 408, unknown conditional: 0, unknown unconditional: 408] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 136 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: 823.0s, OverallIterations: 34, TraceHistogramMax: 3, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 719.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 42 mSolverCounterUnknown, 2840 SdHoareTripleChecker+Valid, 136.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2840 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 134.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 424 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 350 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15999 IncrementalHoareTripleChecker+Invalid, 16815 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 350 mSolverCounterUnsat, 0 mSDtfsCounter, 15999 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1501 GetRequests, 714 SyntacticMatches, 60 SemanticMatches, 727 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 5189 ImplicationChecksByTransitivity, 214.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151300occurred in iteration=33, InterpolantAutomatonStates: 562, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 87.8s InterpolantComputationTime, 1093 NumberOfCodeBlocks, 1087 NumberOfCodeBlocksAsserted, 111 NumberOfCheckSat, 1519 ConstructedInterpolants, 53 QuantifiedInterpolants, 27179 SizeOfPredicates, 144 NumberOfNonLiveVariables, 3943 ConjunctsInSsa, 395 ConjunctsInUnsatCore, 94 InterpolantComputations, 4 PerfectInterpolantSequences, 199/770 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